import java.util.Set; public class BuilderExample { private long created; private String name; private int age; private Set<String> occupations; BuilderExample(String name, int age, Set<String> occupations) { this.name = name; this.age = age; this.occupations = occupations; } private static long $default$created() { return System.currentTimeMillis(); } public static BuilderExampleBuilder builder() { return new BuilderExampleBuilder(); } public static class BuilderExampleBuilder { private long created; private boolean created$set; private String name; private int age; private java.util.ArrayList<String> occupations; BuilderExampleBuilder() { } public BuilderExampleBuilder created(long created) { this.created = created; this.created$set = true; return this; } public BuilderExampleBuilder name(String name) { this.name = name; return this; } public BuilderExampleBuilder age(int age) { this.age = age; return this; } public BuilderExampleBuilder occupation(String occupation) { if (this.occupations == null) { this.occupations = new java.util.ArrayList<String>(); } this.occupations.add(occupation); return this; } public BuilderExampleBuilder occupations(Collection<? extends String> occupations) { if (this.occupations == null) { this.occupations = new java.util.ArrayList<String>(); } this.occupations.addAll(occupations); return this; } public BuilderExampleBuilder clearOccupations() { if (this.occupations != null) { this.occupations.clear(); } return this; } public BuilderExample build() { // complicated switch statement to produce a compact properly sized immutable set omitted. Set<String> occupations = ...; return new BuilderExample(created$set ? created : BuilderExample.$default$created(), name, age, occupations); } @java.lang.Override public String toString() { return "BuilderExample.BuilderExampleBuilder(created = " + this.created + ", name = " + this.name + ", age = " + this.age + ", occupations = " + this.occupations + ")"; } } }