In javac, use ListBuffer to append

8 files changed, 134 insertions, 128 deletions

diff --git a/src/core/lombok/javac/JavacResolution.java b/src/core/lombok/javac/JavacResolution.java
index 2845328d..653e6d6d 100644
--- a/src/core/lombok/javac/JavacResolution.java
+++ b/src/core/lombok/javac/JavacResolution.java
@@ -34,6 +34,7 @@ import com.sun.tools.javac.tree.JCTree.JCVariableDecl;
 import com.sun.tools.javac.tree.TreeMaker;
 import com.sun.tools.javac.util.Context;
 import com.sun.tools.javac.util.List;
+import com.sun.tools.javac.util.ListBuffer;
 import com.sun.tools.javac.util.Log;
 
 public class JavacResolution {
@@ -378,9 +379,9 @@ public class JavacResolution {
 		}
 		
 		if (generics != null && !generics.isEmpty()) {
-			List<JCExpression> args = List.nil();
-			for (Type t : generics) args = args.append(typeToJCTree(t, maker, ast, true));
-			replacement = maker.TypeApply(replacement, args);
+			ListBuffer<JCExpression> args = ListBuffer.lb();
+			for (Type t : generics) args.append(typeToJCTree(t, maker, ast, true));
+			replacement = maker.TypeApply(replacement, args.toList());
 		}
 		
 		return replacement;
diff --git a/src/core/lombok/javac/handlers/HandleCleanup.java b/src/core/lombok/javac/handlers/HandleCleanup.java
index cbbdc007..bfe357ef 100644
--- a/src/core/lombok/javac/handlers/HandleCleanup.java
+++ b/src/core/lombok/javac/handlers/HandleCleanup.java
@@ -50,6 +50,7 @@ import com.sun.tools.javac.tree.JCTree.JCStatement;
 import com.sun.tools.javac.tree.JCTree.JCTypeCast;
 import com.sun.tools.javac.tree.JCTree.JCVariableDecl;
 import com.sun.tools.javac.util.List;
+import com.sun.tools.javac.util.ListBuffer;
 import com.sun.tools.javac.util.Name;
 
 /**
@@ -93,14 +94,14 @@ public class HandleCleanup implements JavacAnnotationHandler<Cleanup> {
 		}
 		
 		boolean seenDeclaration = false;
-		List<JCStatement> tryBlock = List.nil();
-		List<JCStatement> newStatements = List.nil();
+		ListBuffer<JCStatement> newStatements = ListBuffer.lb();
+		ListBuffer<JCStatement> tryBlock = ListBuffer.lb();
 		for (JCStatement statement : statements) {
 			if (!seenDeclaration) {
 				if (statement == decl) seenDeclaration = true;
-				newStatements = newStatements.append(statement);
+				newStatements.append(statement);
 			} else {
-				tryBlock = tryBlock.append(statement);
+				tryBlock.append(statement);
 			}
 		}
 		
@@ -108,8 +109,7 @@ public class HandleCleanup implements JavacAnnotationHandler<Cleanup> {
 			annotationNode.addError("LOMBOK BUG: Can't find this local variable declaration inside its parent.");
 			return true;
 		}
-		
-		doAssignmentCheck(annotationNode, tryBlock, decl.name);
+		doAssignmentCheck(annotationNode, tryBlock.toList(), decl.name);
 		
 		TreeMaker maker = annotationNode.getTreeMaker();
 		JCFieldAccess cleanupMethod = maker.Select(maker.Ident(decl.name), annotationNode.toName(cleanupName));
@@ -123,14 +123,14 @@ public class HandleCleanup implements JavacAnnotationHandler<Cleanup> {
 		
 		JCBlock finalizer = maker.Block(0, List.<JCStatement>of(ifNotNullCleanup));
 		
-		newStatements = newStatements.append(maker.Try(maker.Block(0, tryBlock), List.<JCCatch>nil(), finalizer));
+		newStatements.append(maker.Try(maker.Block(0, tryBlock.toList()), List.<JCCatch>nil(), finalizer));
 		
 		if (blockNode instanceof JCBlock) {
-			((JCBlock)blockNode).stats = newStatements;
+			((JCBlock)blockNode).stats = newStatements.toList();
 		} else if (blockNode instanceof JCCase) {
-			((JCCase)blockNode).stats = newStatements;
+			((JCCase)blockNode).stats = newStatements.toList();
 		} else if (blockNode instanceof JCMethodDecl) {
-			((JCMethodDecl)blockNode).body.stats = newStatements;
+			((JCMethodDecl)blockNode).body.stats = newStatements.toList();
 		} else throw new AssertionError("Should not get here");
 		
 		ancestor.rebuild();
diff --git a/src/core/lombok/javac/handlers/HandleConstructor.java b/src/core/lombok/javac/handlers/HandleConstructor.java
index d56c976f..3370685e 100644
--- a/src/core/lombok/javac/handlers/HandleConstructor.java
+++ b/src/core/lombok/javac/handlers/HandleConstructor.java
@@ -53,6 +53,7 @@ import com.sun.tools.javac.tree.JCTree.JCTypeApply;
 import com.sun.tools.javac.tree.JCTree.JCTypeParameter;
 import com.sun.tools.javac.tree.JCTree.JCVariableDecl;
 import com.sun.tools.javac.util.List;
+import com.sun.tools.javac.util.ListBuffer;
 
 public class HandleConstructor {
 	@ProviderFor(JavacAnnotationHandler.class)
@@ -97,7 +98,7 @@ public class HandleConstructor {
 	}
 	
 	private static List<JavacNode> findRequiredFields(JavacNode typeNode) {
-		List<JavacNode> fields = List.nil();
+		ListBuffer<JavacNode> fields = ListBuffer.lb();
 		for (JavacNode child : typeNode.down()) {
 			if (child.getKind() != Kind.FIELD) continue;
 			JCVariableDecl fieldDecl = (JCVariableDecl) child.get();
@@ -108,9 +109,9 @@ public class HandleConstructor {
 			if ((fieldFlags & Flags.STATIC) != 0) continue;
 			boolean isFinal = (fieldFlags & Flags.FINAL) != 0;
 			boolean isNonNull = !findAnnotations(child, TransformationsUtil.NON_NULL_PATTERN).isEmpty();
-			if ((isFinal || isNonNull) && fieldDecl.init == null) fields = fields.append(child);
+			if ((isFinal || isNonNull) && fieldDecl.init == null) fields.append(child);
 		}
-		return fields;
+		return fields.toList();
 	}
 	
 	@ProviderFor(JavacAnnotationHandler.class)
@@ -125,7 +126,7 @@ public class HandleConstructor {
 			@SuppressWarnings("deprecation")
 			boolean suppressConstructorProperties = ann.suppressConstructorProperties();
 			if (level == AccessLevel.NONE) return true;
-			List<JavacNode> fields = List.nil();
+			ListBuffer<JavacNode> fields = ListBuffer.lb();
 			for (JavacNode child : typeNode.down()) {
 				if (child.getKind() != Kind.FIELD) continue;
 				JCVariableDecl fieldDecl = (JCVariableDecl) child.get();
@@ -134,9 +135,9 @@ public class HandleConstructor {
 				long fieldFlags = fieldDecl.mods.flags;
 				//Skip static fields.
 				if ((fieldFlags & Flags.STATIC) != 0) continue;
-				fields = fields.append(child);
+				fields.append(child);
 			}
-			new HandleConstructor().generateConstructor(typeNode, level, fields, staticName, false, suppressConstructorProperties);
+			new HandleConstructor().generateConstructor(typeNode, level, fields.toList(), staticName, false, suppressConstructorProperties);
 			return true;
 		}
 		
@@ -176,11 +177,11 @@ public class HandleConstructor {
 		if (fields.isEmpty()) return;
 		TreeMaker maker = node.getTreeMaker();
 		JCExpression constructorPropertiesType = chainDots(maker, node, "java", "beans", "ConstructorProperties");
-		List<JCExpression> fieldNames = List.nil();
+		ListBuffer<JCExpression> fieldNames = ListBuffer.lb();
 		for (JavacNode field : fields) {
-			fieldNames = fieldNames.append(maker.Literal(field.getName()));
+			fieldNames.append(maker.Literal(field.getName()));
 		}
-		JCExpression fieldNamesArray = maker.NewArray(null, List.<JCExpression>nil(), fieldNames);
+		JCExpression fieldNamesArray = maker.NewArray(null, List.<JCExpression>nil(), fieldNames.toList());
 		JCAnnotation annotation = maker.Annotation(constructorPropertiesType, List.of(fieldNamesArray));
 		mods.annotations = mods.annotations.append(annotation);
 	}
@@ -188,23 +189,23 @@ public class HandleConstructor {
 	private JCMethodDecl createConstructor(AccessLevel level, JavacNode typeNode, List<JavacNode> fields, boolean suppressConstructorProperties) {
 		TreeMaker maker = typeNode.getTreeMaker();
 		
-		List<JCStatement> nullChecks = List.nil();
-		List<JCStatement> assigns = List.nil();
-		List<JCVariableDecl> params = List.nil();
+		ListBuffer<JCStatement> nullChecks = ListBuffer.lb();
+		ListBuffer<JCStatement> assigns = ListBuffer.lb();
+		ListBuffer<JCVariableDecl> params = ListBuffer.lb();
 		
 		for (JavacNode fieldNode : fields) {
 			JCVariableDecl field = (JCVariableDecl) fieldNode.get();
 			List<JCAnnotation> nonNulls = findAnnotations(fieldNode, TransformationsUtil.NON_NULL_PATTERN);
 			List<JCAnnotation> nullables = findAnnotations(fieldNode, TransformationsUtil.NULLABLE_PATTERN);
 			JCVariableDecl param = maker.VarDef(maker.Modifiers(Flags.FINAL, nonNulls.appendList(nullables)), field.name, field.vartype, null);
-			params = params.append(param);
+			params.append(param);
 			JCFieldAccess thisX = maker.Select(maker.Ident(fieldNode.toName("this")), field.name);
 			JCAssign assign = maker.Assign(thisX, maker.Ident(field.name));
-			assigns = assigns.append(maker.Exec(assign));
+			assigns.append(maker.Exec(assign));
 			
 			if (!nonNulls.isEmpty()) {
 				JCStatement nullCheck = generateNullCheck(maker, fieldNode);
-				if (nullCheck != null) nullChecks = nullChecks.append(nullCheck);
+				if (nullCheck != null) nullChecks.append(nullCheck);
 			}
 		}
 		
@@ -214,7 +215,7 @@ public class HandleConstructor {
 		}
 		
 		return maker.MethodDef(mods, typeNode.toName("<init>"),
-				null, List.<JCTypeParameter>nil(), params, List.<JCExpression>nil(), maker.Block(0L, nullChecks.appendList(assigns)), null);
+				null, List.<JCTypeParameter>nil(), params.toList(), List.<JCExpression>nil(), maker.Block(0L, nullChecks.appendList(assigns).toList()), null);
 	}
 	
 	private boolean isLocalType(JavacNode type) {
@@ -232,20 +233,20 @@ public class HandleConstructor {
 		
 		JCExpression returnType, constructorType;
 		
-		List<JCTypeParameter> typeParams = List.nil();
-		List<JCVariableDecl> params = List.nil();
-		List<JCExpression> typeArgs1 = List.nil();
-		List<JCExpression> typeArgs2 = List.nil();
-		List<JCExpression> args = List.nil();
+		ListBuffer<JCTypeParameter> typeParams = ListBuffer.lb();
+		ListBuffer<JCVariableDecl> params = ListBuffer.lb();
+		ListBuffer<JCExpression> typeArgs1 = ListBuffer.lb();
+		ListBuffer<JCExpression> typeArgs2 = ListBuffer.lb();
+		ListBuffer<JCExpression> args = ListBuffer.lb();
 		
 		if (!type.typarams.isEmpty()) {
 			for (JCTypeParameter param : type.typarams) {
-				typeArgs1 = typeArgs1.append(maker.Ident(param.name));
-				typeArgs2 = typeArgs2.append(maker.Ident(param.name));
-				typeParams = typeParams.append(maker.TypeParameter(param.name, param.bounds));
+				typeArgs1.append(maker.Ident(param.name));
+				typeArgs2.append(maker.Ident(param.name));
+				typeParams.append(maker.TypeParameter(param.name, param.bounds));
 			}
-			returnType = maker.TypeApply(maker.Ident(type.name), typeArgs1);
-			constructorType = maker.TypeApply(maker.Ident(type.name), typeArgs2);
+			returnType = maker.TypeApply(maker.Ident(type.name), typeArgs1.toList());
+			constructorType = maker.TypeApply(maker.Ident(type.name), typeArgs2.toList());
 		} else {
 			returnType = maker.Ident(type.name);
 			constructorType = maker.Ident(type.name);
@@ -257,21 +258,21 @@ public class HandleConstructor {
 			if (field.vartype instanceof JCIdent) pType = maker.Ident(((JCIdent)field.vartype).name);
 			else if (field.vartype instanceof JCTypeApply) {
 				JCTypeApply typeApply = (JCTypeApply) field.vartype;
-				List<JCExpression> tArgs = List.nil();
-				for (JCExpression arg : typeApply.arguments) tArgs = tArgs.append(arg);
-				pType = maker.TypeApply(typeApply.clazz, tArgs);
+				ListBuffer<JCExpression> tArgs = ListBuffer.lb();
+				for (JCExpression arg : typeApply.arguments) tArgs.append(arg);
+				pType = maker.TypeApply(typeApply.clazz, tArgs.toList());
 			} else {
 				pType = field.vartype;
 			}
 			List<JCAnnotation> nonNulls = findAnnotations(fieldNode, TransformationsUtil.NON_NULL_PATTERN);
 			List<JCAnnotation> nullables = findAnnotations(fieldNode, TransformationsUtil.NULLABLE_PATTERN);
 			JCVariableDecl param = maker.VarDef(maker.Modifiers(Flags.FINAL, nonNulls.appendList(nullables)), field.name, pType, null);
-			params = params.append(param);
-			args = args.append(maker.Ident(field.name));
+			params.append(param);
+			args.append(maker.Ident(field.name));
 		}
-		JCReturn returnStatement = maker.Return(maker.NewClass(null, List.<JCExpression>nil(), constructorType, args, null));
+		JCReturn returnStatement = maker.Return(maker.NewClass(null, List.<JCExpression>nil(), constructorType, args.toList(), null));
 		JCBlock body = maker.Block(0, List.<JCStatement>of(returnStatement));
 		
-		return maker.MethodDef(mods, typeNode.toName(name), returnType, typeParams, params, List.<JCExpression>nil(), body, null);
+		return maker.MethodDef(mods, typeNode.toName(name), returnType, typeParams.toList(), params.toList(), List.<JCExpression>nil(), body, null);
 	}
 }
diff --git a/src/core/lombok/javac/handlers/HandleEqualsAndHashCode.java b/src/core/lombok/javac/handlers/HandleEqualsAndHashCode.java
index 8799f2e1..59689614 100644
--- a/src/core/lombok/javac/handlers/HandleEqualsAndHashCode.java
+++ b/src/core/lombok/javac/handlers/HandleEqualsAndHashCode.java
@@ -51,6 +51,7 @@ import com.sun.tools.javac.tree.JCTree.JCTypeParameter;
 import com.sun.tools.javac.tree.JCTree.JCUnary;
 import com.sun.tools.javac.tree.JCTree.JCVariableDecl;
 import com.sun.tools.javac.util.List;
+import com.sun.tools.javac.util.ListBuffer;
 import com.sun.tools.javac.util.Name;
 
 /**
@@ -146,12 +147,12 @@ public class HandleEqualsAndHashCode implements JavacAnnotationHandler<EqualsAnd
 			errorNode.addWarning("Generating equals/hashCode implementation but without a call to superclass, even though this class does not extend java.lang.Object. If this is intentional, add '@EqualsAndHashCode(callSuper=false)' to your type.");
 		}
 		
-		List<JavacNode> nodesForEquality = List.nil();
+		ListBuffer<JavacNode> nodesForEquality = ListBuffer.lb();
 		if (includes != null) {
 			for (JavacNode child : typeNode.down()) {
 				if (child.getKind() != Kind.FIELD) continue;
 				JCVariableDecl fieldDecl = (JCVariableDecl) child.get();
-				if (includes.contains(fieldDecl.name.toString())) nodesForEquality = nodesForEquality.append(child);
+				if (includes.contains(fieldDecl.name.toString())) nodesForEquality.append(child);
 			}
 		} else {
 			for (JavacNode child : typeNode.down()) {
@@ -165,7 +166,7 @@ public class HandleEqualsAndHashCode implements JavacAnnotationHandler<EqualsAnd
 				if (excludes != null && excludes.contains(fieldDecl.name.toString())) continue;
 				//Skip fields that start with $
 				if (fieldDecl.name.toString().startsWith("$")) continue;
-				nodesForEquality = nodesForEquality.append(child);
+				nodesForEquality.append(child);
 			}
 		}
 		
@@ -175,7 +176,7 @@ public class HandleEqualsAndHashCode implements JavacAnnotationHandler<EqualsAnd
 			boolean isFinal = (((JCClassDecl)typeNode.get()).mods.flags & Flags.FINAL) != 0;
 			needsCanEqual = !isFinal || !isDirectDescendantOfObject;
 			
-			JCMethodDecl method = createEquals(typeNode, nodesForEquality, callSuper, fieldAccess, needsCanEqual);
+			JCMethodDecl method = createEquals(typeNode, nodesForEquality.toList(), callSuper, fieldAccess, needsCanEqual);
 			injectMethod(typeNode, method);
 			break;
 		case EXISTS_BY_LOMBOK:
@@ -202,7 +203,7 @@ public class HandleEqualsAndHashCode implements JavacAnnotationHandler<EqualsAnd
 		}
 		switch (methodExists("hashCode", typeNode)) {
 		case NOT_EXISTS:
-			JCMethodDecl method = createHashCode(typeNode, nodesForEquality, callSuper, fieldAccess);
+			JCMethodDecl method = createHashCode(typeNode, nodesForEquality.toList(), callSuper, fieldAccess);
 			injectMethod(typeNode, method);
 			break;
 		case EXISTS_BY_LOMBOK:
@@ -223,28 +224,28 @@ public class HandleEqualsAndHashCode implements JavacAnnotationHandler<EqualsAnd
 		JCAnnotation overrideAnnotation = maker.Annotation(chainDots(maker, typeNode, "java", "lang", "Override"), List.<JCExpression>nil());
 		JCModifiers mods = maker.Modifiers(Flags.PUBLIC, List.of(overrideAnnotation));
 		JCExpression returnType = maker.TypeIdent(TypeTags.INT);
-		List<JCStatement> statements = List.nil();
+		ListBuffer<JCStatement> statements = ListBuffer.lb();
 		
 		Name primeName = typeNode.toName("PRIME");
 		Name resultName = typeNode.toName("result");
 		/* final int PRIME = 31; */ {
 			if (!fields.isEmpty() || callSuper) {
-				statements = statements.append(maker.VarDef(maker.Modifiers(Flags.FINAL),
+				statements.append(maker.VarDef(maker.Modifiers(Flags.FINAL),
 						primeName, maker.TypeIdent(TypeTags.INT), maker.Literal(31)));
 			}
 		}
 		
 		/* int result = 1; */ {
-			statements = statements.append(maker.VarDef(maker.Modifiers(0), resultName, maker.TypeIdent(TypeTags.INT), maker.Literal(1)));
+			statements.append(maker.VarDef(maker.Modifiers(0), resultName, maker.TypeIdent(TypeTags.INT), maker.Literal(1)));
 		}
 		
-		List<JCExpression> intoResult = List.nil();
+		ListBuffer<JCExpression> intoResult = ListBuffer.lb();
 		
 		if (callSuper) {
 			JCMethodInvocation callToSuper = maker.Apply(List.<JCExpression>nil(),
 					maker.Select(maker.Ident(typeNode.toName("super")), typeNode.toName("hashCode")),
 					List.<JCExpression>nil());
-			intoResult = intoResult.append(callToSuper);
+			intoResult.append(callToSuper);
 		}
 		
 		int tempCounter = 0;
@@ -255,14 +256,14 @@ public class HandleEqualsAndHashCode implements JavacAnnotationHandler<EqualsAnd
 				switch (((JCPrimitiveTypeTree)fType).getPrimitiveTypeKind()) {
 				case BOOLEAN:
 					/* this.fieldName ? 1231 : 1237 */
-					intoResult = intoResult.append(maker.Conditional(fieldAccessor, maker.Literal(1231), maker.Literal(1237)));
+					intoResult.append(maker.Conditional(fieldAccessor, maker.Literal(1231), maker.Literal(1237)));
 					break;
 				case LONG:
-					intoResult = intoResult.append(longToIntForHashCode(maker, fieldAccessor, createFieldAccessor(maker, fieldNode, fieldAccess)));
+					intoResult.append(longToIntForHashCode(maker, fieldAccessor, createFieldAccessor(maker, fieldNode, fieldAccess)));
 					break;
 				case FLOAT:
 					/* Float.floatToIntBits(this.fieldName) */
-					intoResult = intoResult.append(maker.Apply(
+					intoResult.append(maker.Apply(
 							List.<JCExpression>nil(),
 							chainDots(maker, typeNode, "java", "lang", "Float", "floatToIntBits"),
 							List.of(fieldAccessor)));
@@ -274,9 +275,9 @@ public class HandleEqualsAndHashCode implements JavacAnnotationHandler<EqualsAnd
 							List.<JCExpression>nil(),
 							chainDots(maker, typeNode, "java", "lang", "Double", "doubleToLongBits"),
 							List.of(fieldAccessor));
-					statements = statements.append(
+					statements.append(
 							maker.VarDef(maker.Modifiers(Flags.FINAL), tempVar, maker.TypeIdent(TypeTags.LONG), init));
-					intoResult = intoResult.append(longToIntForHashCode(maker, maker.Ident(tempVar), maker.Ident(tempVar)));
+					intoResult.append(longToIntForHashCode(maker, maker.Ident(tempVar), maker.Ident(tempVar)));
 					break;
 				default:
 				case BYTE:
@@ -284,7 +285,7 @@ public class HandleEqualsAndHashCode implements JavacAnnotationHandler<EqualsAnd
 				case INT:
 				case CHAR:
 					/* just the field */
-					intoResult = intoResult.append(fieldAccessor);
+					intoResult.append(fieldAccessor);
 					break;
 				}
 			} else if (fType instanceof JCArrayTypeTree) {
@@ -294,14 +295,14 @@ public class HandleEqualsAndHashCode implements JavacAnnotationHandler<EqualsAnd
 				boolean useDeepHC = multiDim || !primitiveArray;
 				
 				JCExpression hcMethod = chainDots(maker, typeNode, "java", "util", "Arrays", useDeepHC ? "deepHashCode" : "hashCode");
-				intoResult = intoResult.append(
+				intoResult.append(
 						maker.Apply(List.<JCExpression>nil(), hcMethod, List.of(fieldAccessor)));
 			} else /* objects */ {
 				/* this.fieldName == null ? 0 : this.fieldName.hashCode() */
 				JCExpression hcCall = maker.Apply(List.<JCExpression>nil(), maker.Select(createFieldAccessor(maker, fieldNode, fieldAccess), typeNode.toName("hashCode")),
 						List.<JCExpression>nil());
 				JCExpression thisEqualsNull = maker.Binary(JCTree.EQ, fieldAccessor, maker.Literal(TypeTags.BOT, null));
-				intoResult = intoResult.append(
+				intoResult.append(
 						maker.Conditional(thisEqualsNull, maker.Literal(0), hcCall));
 			}
 		}
@@ -311,14 +312,14 @@ public class HandleEqualsAndHashCode implements JavacAnnotationHandler<EqualsAnd
 		for (JCExpression expr : intoResult) {
 			JCExpression mult = maker.Binary(JCTree.MUL, maker.Ident(resultName), maker.Ident(primeName));
 			JCExpression add = maker.Binary(JCTree.PLUS, mult, expr);
-			statements = statements.append(maker.Exec(maker.Assign(maker.Ident(resultName), add)));
+			statements.append(maker.Exec(maker.Assign(maker.Ident(resultName), add)));
 		}
 		
 		/* return result; */ {
-			statements = statements.append(maker.Return(maker.Ident(resultName)));
+			statements.append(maker.Return(maker.Ident(resultName)));
 		}
 		
-		JCBlock body = maker.Block(0, statements);
+		JCBlock body = maker.Block(0, statements.toList());
 		return maker.MethodDef(mods, typeNode.toName("hashCode"), returnType,
 				List.<JCTypeParameter>nil(), List.<JCVariableDecl>nil(), List.<JCExpression>nil(), body, null);
 	}
@@ -344,38 +345,38 @@ public class HandleEqualsAndHashCode implements JavacAnnotationHandler<EqualsAnd
 		JCExpression objectType = chainDots(maker, typeNode, "java", "lang", "Object");
 		JCExpression returnType = maker.TypeIdent(TypeTags.BOOLEAN);
 		
-		List<JCStatement> statements = List.nil();
-		List<JCVariableDecl> params = List.of(maker.VarDef(maker.Modifiers(Flags.FINAL), oName, objectType, null));
+		ListBuffer<JCStatement> statements = ListBuffer.lb();
+		final List<JCVariableDecl> params = List.of(maker.VarDef(maker.Modifiers(Flags.FINAL), oName, objectType, null));
 		
 		/* if (o == this) return true; */ {
-			statements = statements.append(maker.If(maker.Binary(JCTree.EQ, maker.Ident(oName),
+			statements.append(maker.If(maker.Binary(JCTree.EQ, maker.Ident(oName),
 					maker.Ident(thisName)), returnBool(maker, true), null));
 		}
 		
 		/* if (!(o instanceof MyType) return false; */ {
 			JCUnary notInstanceOf = maker.Unary(JCTree.NOT, maker.TypeTest(maker.Ident(oName), maker.Ident(type.name)));
-			statements = statements.append(maker.If(notInstanceOf, returnBool(maker, false), null));
+			statements.append(maker.If(notInstanceOf, returnBool(maker, false), null));
 		}
 		
 		/* MyType<?> other = (MyType<?>) o; */ {
 			if (!fields.isEmpty() || needsCanEqual) {
 				final JCExpression selfType1, selfType2;
-				List<JCExpression> wildcards1 = List.nil();
-				List<JCExpression> wildcards2 = List.nil();
+				ListBuffer<JCExpression> wildcards1 = ListBuffer.lb();
+				ListBuffer<JCExpression> wildcards2 = ListBuffer.lb();
 				for (int i = 0 ; i < type.typarams.length() ; i++) {
-					wildcards1 = wildcards1.append(maker.Wildcard(maker.TypeBoundKind(BoundKind.UNBOUND), null));
-					wildcards2 = wildcards2.append(maker.Wildcard(maker.TypeBoundKind(BoundKind.UNBOUND), null));
+					wildcards1.append(maker.Wildcard(maker.TypeBoundKind(BoundKind.UNBOUND), null));
+					wildcards2.append(maker.Wildcard(maker.TypeBoundKind(BoundKind.UNBOUND), null));
 				}
 				
 				if (type.typarams.isEmpty()) {
 					selfType1 = maker.Ident(type.name);
 					selfType2 = maker.Ident(type.name);
 				} else {
-					selfType1 = maker.TypeApply(maker.Ident(type.name), wildcards1);
-					selfType2 = maker.TypeApply(maker.Ident(type.name), wildcards2);
+					selfType1 = maker.TypeApply(maker.Ident(type.name), wildcards1.toList());
+					selfType2 = maker.TypeApply(maker.Ident(type.name), wildcards2.toList());
 				}
 				
-				statements = statements.append(
+				statements.append(
 						maker.VarDef(maker.Modifiers(Flags.FINAL), otherName, selfType1, maker.TypeCast(selfType2, maker.Ident(oName))));
 			}
 		}
@@ -386,7 +387,7 @@ public class HandleEqualsAndHashCode implements JavacAnnotationHandler<EqualsAnd
 				JCExpression equalityCheck = maker.Apply(exprNil, 
 						maker.Select(maker.Ident(otherName), typeNode.toName("canEqual")),
 						List.<JCExpression>of(maker.Ident(thisName)));
-				statements = statements.append(maker.If(maker.Unary(JCTree.NOT, equalityCheck), returnBool(maker, false), null));
+				statements.append(maker.If(maker.Unary(JCTree.NOT, equalityCheck), returnBool(maker, false), null));
 			}
 		}
 		
@@ -396,7 +397,7 @@ public class HandleEqualsAndHashCode implements JavacAnnotationHandler<EqualsAnd
 					maker.Select(maker.Ident(typeNode.toName("super")), typeNode.toName("equals")),
 					List.<JCExpression>of(maker.Ident(oName)));
 			JCUnary superNotEqual = maker.Unary(JCTree.NOT, callToSuper);
-			statements = statements.append(maker.If(superNotEqual, returnBool(maker, false), null));
+			statements.append(maker.If(superNotEqual, returnBool(maker, false), null));
 		}
 		
 		for (JavacNode fieldNode : fields) {
@@ -407,15 +408,15 @@ public class HandleEqualsAndHashCode implements JavacAnnotationHandler<EqualsAnd
 				switch (((JCPrimitiveTypeTree)fType).getPrimitiveTypeKind()) {
 				case FLOAT:
 					/* if (Float.compare(this.fieldName, other.fieldName) != 0) return false; */
-					statements = statements.append(generateCompareFloatOrDouble(thisFieldAccessor, otherFieldAccessor, maker, typeNode, false));
+					statements.append(generateCompareFloatOrDouble(thisFieldAccessor, otherFieldAccessor, maker, typeNode, false));
 					break;
 				case DOUBLE:
 					/* if (Double(this.fieldName, other.fieldName) != 0) return false; */
-					statements = statements.append(generateCompareFloatOrDouble(thisFieldAccessor, otherFieldAccessor, maker, typeNode, true));
+					statements.append(generateCompareFloatOrDouble(thisFieldAccessor, otherFieldAccessor, maker, typeNode, true));
 					break;
 				default:
 					/* if (this.fieldName != other.fieldName) return false; */
-					statements = statements.append(
+					statements.append(
 							maker.If(maker.Binary(JCTree.NE, thisFieldAccessor, otherFieldAccessor), returnBool(maker, false), null));
 					break;
 				}
@@ -427,7 +428,7 @@ public class HandleEqualsAndHashCode implements JavacAnnotationHandler<EqualsAnd
 				
 				JCExpression eqMethod = chainDots(maker, typeNode, "java", "util", "Arrays", useDeepEquals ? "deepEquals" : "equals");
 				List<JCExpression> args = List.of(thisFieldAccessor, otherFieldAccessor);
-				statements = statements.append(maker.If(maker.Unary(JCTree.NOT,
+				statements.append(maker.If(maker.Unary(JCTree.NOT,
 						maker.Apply(List.<JCExpression>nil(), eqMethod, args)), returnBool(maker, false), null));
 			} else /* objects */ {
 				/* if (this.fieldName == null ? other.fieldName != null : !this.fieldName.equals(other.fieldName)) return false; */
@@ -437,15 +438,15 @@ public class HandleEqualsAndHashCode implements JavacAnnotationHandler<EqualsAnd
 						maker.Select(createFieldAccessor(maker, fieldNode, fieldAccess), typeNode.toName("equals")),
 						List.of(createFieldAccessor(maker, fieldNode, fieldAccess, maker.Ident(otherName))));
 				JCExpression fieldsAreNotEqual = maker.Conditional(thisEqualsNull, otherNotEqualsNull, maker.Unary(JCTree.NOT, thisEqualsThat));
-				statements = statements.append(maker.If(fieldsAreNotEqual, returnBool(maker, false), null));
+				statements.append(maker.If(fieldsAreNotEqual, returnBool(maker, false), null));
 			}
 		}
 		
 		/* return true; */ {
-			statements = statements.append(returnBool(maker, true));
+			statements.append(returnBool(maker, true));
 		}
 		
-		JCBlock body = maker.Block(0, statements);
+		JCBlock body = maker.Block(0, statements.toList());
 		return maker.MethodDef(mods, typeNode.toName("equals"), returnType, List.<JCTypeParameter>nil(), params, List.<JCExpression>nil(), body, null);
 	}
 
diff --git a/src/core/lombok/javac/handlers/HandleGetter.java b/src/core/lombok/javac/handlers/HandleGetter.java
index be1bc49a..85387684 100644
--- a/src/core/lombok/javac/handlers/HandleGetter.java
+++ b/src/core/lombok/javac/handlers/HandleGetter.java
@@ -61,6 +61,7 @@ import com.sun.tools.javac.tree.JCTree.JCTypeApply;
 import com.sun.tools.javac.tree.JCTree.JCTypeParameter;
 import com.sun.tools.javac.tree.JCTree.JCVariableDecl;
 import com.sun.tools.javac.util.List;
+import com.sun.tools.javac.util.ListBuffer;
 import com.sun.tools.javac.util.Name;
 import com.sun.tools.javac.util.JCDiagnostic.DiagnosticPosition;
 
@@ -287,7 +288,7 @@ public class HandleGetter implements JavacAnnotationHandler<Getter> {
 		return value.get();
 		*/
 		
-		List<JCStatement> statements = List.nil();
+		ListBuffer<JCStatement> statements = ListBuffer.lb();
 		
 		JCVariableDecl field = (JCVariableDecl) fieldNode.get();
 		field.type = null;
@@ -302,46 +303,46 @@ public class HandleGetter implements JavacAnnotationHandler<Getter> {
 		
 		/* java.util.concurrent.atomic.AtomicReference<ValueType> value = this.fieldName.get();*/ {
 			JCTypeApply valueVarType = maker.TypeApply(chainDotsString(maker, fieldNode, AR), List.of(copyType(maker, field)));
-			statements = statements.append(maker.VarDef(maker.Modifiers(0), valueName, valueVarType, callGet(fieldNode, createFieldAccessor(maker, fieldNode, FieldAccess.ALWAYS_FIELD))));
+			statements.append(maker.VarDef(maker.Modifiers(0), valueName, valueVarType, callGet(fieldNode, createFieldAccessor(maker, fieldNode, FieldAccess.ALWAYS_FIELD))));
 		}
 		
 		/* if (value == null) { */ {
 			JCSynchronized synchronizedStatement;
 			/* synchronized (this.fieldName) { */ {
-				List<JCStatement> synchronizedStatements = List.nil();
+				ListBuffer<JCStatement> synchronizedStatements = ListBuffer.lb();
 				/* value = this.fieldName.get(); */ {
 					JCExpressionStatement newAssign = maker.Exec(maker.Assign(maker.Ident(valueName), callGet(fieldNode, createFieldAccessor(maker, fieldNode, FieldAccess.ALWAYS_FIELD))));
-					synchronizedStatements = synchronizedStatements.append(newAssign);
+					synchronizedStatements.append(newAssign);
 				}
 				
 				/* if (value == null) { */ {
-					List<JCStatement> innerIfStatements = List.nil();
+					ListBuffer<JCStatement> innerIfStatements = ListBuffer.lb();
 					/* value = new java.util.concurrent.atomic.AtomicReference<ValueType>(new ValueType());*/ {
 						JCTypeApply valueVarType = maker.TypeApply(chainDotsString(maker, fieldNode, AR), List.of(copyType(maker, field)));			
 						JCNewClass newInstance = maker.NewClass(null, NIL_EXPRESSION, valueVarType, List.<JCExpression>of(field.init), null);
 						
 						JCStatement statement = maker.Exec(maker.Assign(maker.Ident(valueName), newInstance));
-						innerIfStatements = innerIfStatements.append(statement);
+						innerIfStatements.append(statement);
 					}
 					/* this.fieldName.set(value); */ {
 						JCStatement statement = callSet(fieldNode, createFieldAccessor(maker, fieldNode, FieldAccess.ALWAYS_FIELD), maker.Ident(valueName));
-						innerIfStatements = innerIfStatements.append(statement);
+						innerIfStatements.append(statement);
 					}
 					
 					JCBinary isNull = maker.Binary(JCTree.EQ, maker.Ident(valueName), maker.Literal(TypeTags.BOT, null));
-					JCIf ifStatement = maker.If(isNull, maker.Block(0, innerIfStatements), null);
-					synchronizedStatements = synchronizedStatements.append(ifStatement);
+					JCIf ifStatement = maker.If(isNull, maker.Block(0, innerIfStatements.toList()), null);
+					synchronizedStatements.append(ifStatement);
 				}
 				
-				synchronizedStatement = maker.Synchronized(createFieldAccessor(maker, fieldNode, FieldAccess.ALWAYS_FIELD), maker.Block(0, synchronizedStatements));
+				synchronizedStatement = maker.Synchronized(createFieldAccessor(maker, fieldNode, FieldAccess.ALWAYS_FIELD), maker.Block(0, synchronizedStatements.toList()));
 			}
 			
 			JCBinary isNull = maker.Binary(JCTree.EQ, maker.Ident(valueName), maker.Literal(TypeTags.BOT, null));
 			JCIf ifStatement = maker.If(isNull, maker.Block(0, List.<JCStatement>of(synchronizedStatement)), null);
-			statements = statements.append(ifStatement);
+			statements.append(ifStatement);
 		}
 		/* return value.get(); */
-		statements = statements.append(maker.Return(callGet(fieldNode, maker.Ident(valueName))));
+		statements.append(maker.Return(callGet(fieldNode, maker.Ident(valueName))));
 		
 		// update the field type and init last
 		
@@ -350,7 +351,7 @@ public class HandleGetter implements JavacAnnotationHandler<Getter> {
 			field.init = maker.NewClass(null, NIL_EXPRESSION, copyType(maker, field), NIL_EXPRESSION, null);
 		}
 		
-		return statements;
+		return statements.toList();
 	}
 	
 	private JCMethodInvocation callGet(JavacNode source, JCExpression receiver) {
diff --git a/src/core/lombok/javac/handlers/HandleToString.java b/src/core/lombok/javac/handlers/HandleToString.java
index 82e32c06..183658c2 100644
--- a/src/core/lombok/javac/handlers/HandleToString.java
+++ b/src/core/lombok/javac/handlers/HandleToString.java
@@ -49,6 +49,7 @@ import com.sun.tools.javac.tree.JCTree.JCStatement;
 import com.sun.tools.javac.tree.JCTree.JCTypeParameter;
 import com.sun.tools.javac.tree.JCTree.JCVariableDecl;
 import com.sun.tools.javac.util.List;
+import com.sun.tools.javac.util.ListBuffer;
 
 /**
  * Handles the {@code ToString} annotation for javac.
@@ -130,12 +131,12 @@ public class HandleToString implements JavacAnnotationHandler<ToString> {
 			return false;
 		}
 		
-		List<JavacNode> nodesForToString = List.nil();
+		ListBuffer<JavacNode> nodesForToString = ListBuffer.lb();
 		if (includes != null) {
 			for (JavacNode child : typeNode.down()) {
 				if (child.getKind() != Kind.FIELD) continue;
 				JCVariableDecl fieldDecl = (JCVariableDecl) child.get();
-				if (includes.contains(fieldDecl.name.toString())) nodesForToString = nodesForToString.append(child);
+				if (includes.contains(fieldDecl.name.toString())) nodesForToString.append(child);
 			}
 		} else {
 			for (JavacNode child : typeNode.down()) {
@@ -147,13 +148,13 @@ public class HandleToString implements JavacAnnotationHandler<ToString> {
 				if (excludes != null && excludes.contains(fieldDecl.name.toString())) continue;
 				//Skip fields that start with $.
 				if (fieldDecl.name.toString().startsWith("$")) continue;
-				nodesForToString = nodesForToString.append(child);
+				nodesForToString.append(child);
 			}
 		}
 		
 		switch (methodExists("toString", typeNode)) {
 		case NOT_EXISTS:
-			JCMethodDecl method = createToString(typeNode, nodesForToString, includeFieldNames, callSuper, fieldAccess);
+			JCMethodDecl method = createToString(typeNode, nodesForToString.toList(), includeFieldNames, callSuper, fieldAccess);
 			injectMethod(typeNode, method);
 			return true;
 		case EXISTS_BY_LOMBOK:
diff --git a/src/core/lombok/javac/handlers/JavacHandlerUtil.java b/src/core/lombok/javac/handlers/JavacHandlerUtil.java
index d1884e5c..3f869410 100644
--- a/src/core/lombok/javac/handlers/JavacHandlerUtil.java
+++ b/src/core/lombok/javac/handlers/JavacHandlerUtil.java
@@ -54,6 +54,7 @@ import com.sun.tools.javac.tree.JCTree.JCNewArray;
 import com.sun.tools.javac.tree.JCTree.JCStatement;
 import com.sun.tools.javac.tree.JCTree.JCVariableDecl;
 import com.sun.tools.javac.util.List;
+import com.sun.tools.javac.util.ListBuffer;
 import com.sun.tools.javac.util.Name;
 
 /**
@@ -109,7 +110,7 @@ public class JavacHandlerUtil {
 	
 	public static void deleteImportFromCompilationUnit(JavacNode node, String name) {
 		if (!node.shouldDeleteLombokAnnotations()) return;
-		List<JCTree> newDefs = List.nil();
+		ListBuffer<JCTree> newDefs = ListBuffer.lb();
 		
 		JCCompilationUnit unit = (JCCompilationUnit) node.top().get();
 		
@@ -119,17 +120,17 @@ public class JavacHandlerUtil {
 				JCImport imp0rt = (JCImport)def;
 				delete = (!imp0rt.staticImport && imp0rt.qualid.toString().equals(name));
 			}
-			if (!delete) newDefs = newDefs.append(def);
+			if (!delete) newDefs.append(def);
 		}
-		unit.defs = newDefs;
+		unit.defs = newDefs.toList();
 	}
 
 	private static List<JCAnnotation> filterList(List<JCAnnotation> annotations, JCTree jcTree) {
-		List<JCAnnotation> newAnnotations = List.nil();
+		ListBuffer<JCAnnotation> newAnnotations = ListBuffer.lb();
 		for (JCAnnotation ann : annotations) {
-			if (jcTree != ann) newAnnotations = newAnnotations.append(ann);
+			if (jcTree != ann) newAnnotations.append(ann);
 		}
-		return newAnnotations;
+		return newAnnotations.toList();
 	}
 	
 	/**
@@ -486,12 +487,12 @@ public class JavacHandlerUtil {
 	}
 	
 	private static List<JCTree> addAllButOne(List<JCTree> defs, int idx) {
-		List<JCTree> out = List.nil();
+		ListBuffer<JCTree> out = ListBuffer.lb();
 		int i = 0;
 		for (JCTree def : defs) {
-			if (i++ != idx) out = out.append(def);
+			if (i++ != idx) out.append(def);
 		}
-		return out;
+		return out.toList();
 	}
 	
 	/**
@@ -537,7 +538,7 @@ public class JavacHandlerUtil {
 	 * Only the simple name is checked - the package and any containing class are ignored.
 	 */
 	public static List<JCAnnotation> findAnnotations(JavacNode fieldNode, Pattern namePattern) {
-		List<JCAnnotation> result = List.nil();
+		ListBuffer<JCAnnotation> result = ListBuffer.lb();
 		for (JavacNode child : fieldNode.down()) {
 			if (child.getKind() == Kind.ANNOTATION) {
 				JCAnnotation annotation = (JCAnnotation) child.get();
@@ -545,11 +546,11 @@ public class JavacHandlerUtil {
 				int idx = name.lastIndexOf(".");
 				String suspect = idx == -1 ? name : name.substring(idx + 1);
 				if (namePattern.matcher(suspect).matches()) {
-					result = result.append(annotation);
+					result.append(annotation);
 				}
 			}
 		}	
-		return result;
+		return result.toList();
 	}
 	
 	/**
@@ -586,16 +587,16 @@ public class JavacHandlerUtil {
 			if (idx > -1) matched[idx] = true;
 		}
 		
-		List<Integer> problematic = List.nil();
+		ListBuffer<Integer> problematic = ListBuffer.lb();
 		for (int i = 0 ; i < list.size() ; i++) {
-			if (!matched[i]) problematic = problematic.append(i);
+			if (!matched[i]) problematic.append(i);
 		}
 		
-		return problematic;
+		return problematic.toList();
 	}
 	
 	static List<JCExpression> getAndRemoveAnnotationParameter(JCAnnotation ast, String parameterName) {
-		List<JCExpression> params = List.nil();
+		ListBuffer<JCExpression> params = ListBuffer.lb();
 		List<JCExpression> result = List.nil();
 		
 		for (JCExpression param : ast.args) {
@@ -614,18 +615,18 @@ public class JavacHandlerUtil {
 				}
 			}
 			
-			params = params.append(param);
+			params.append(param);
 		}
-		ast.args = params;
+		ast.args = params.toList();
 		return result;
 	}
 	
 	static List<JCAnnotation> copyAnnotations(List<JCExpression> in) {
-		List<JCAnnotation> out = List.nil();
+		ListBuffer<JCAnnotation> out = ListBuffer.lb();
 		for (JCExpression expr : in) {
 			if (!(expr instanceof JCAnnotation)) continue;
-			out = out.append((JCAnnotation) expr.clone());
+			out.append((JCAnnotation) expr.clone());
 		}
-		return out;
+		return out.toList();
 	}
 }
diff --git a/src/delombok/lombok/delombok/Delombok.java b/src/delombok/lombok/delombok/Delombok.java
index 6fc77c59..f3069c25 100644
--- a/src/delombok/lombok/delombok/Delombok.java
+++ b/src/delombok/lombok/delombok/Delombok.java
@@ -389,7 +389,7 @@ public class Delombok {
 		
 		JavaCompiler delegate = compiler.processAnnotations(compiler.enterTrees(toJavacList(roots)));
 		for (JCCompilationUnit unit : roots) {
-			DelombokResult result = new DelombokResult(commentsMap.get(unit).comments, unit, force || tca.changed.contains(unit));
+			DelombokResult result = new DelombokResult(commentsMap.get(unit).comments.toList(), unit, force || tca.changed.contains(unit));
 			if (verbose) feedback.printf("File: %s [%s]\n", unit.sourcefile.getName(), result.isChanged() ? "delomboked" : "unchanged");
 			Writer rawWriter;
 			if (presetWriter != null) rawWriter = presetWriter;
@@ -408,10 +408,10 @@ public class Delombok {
 	}
 	
 	public static class Comments {
-		public com.sun.tools.javac.util.List<Comment> comments = com.sun.tools.javac.util.List.nil();
+		public com.sun.tools.javac.util.ListBuffer<Comment> comments = com.sun.tools.javac.util.ListBuffer.lb();
 		
 		void add(Comment comment) {
-			comments = comments.append(comment);
+			comments.append(comment);
 		}
 	}