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diff --git a/challenge-120/abigail/java/ch-2.java b/challenge-120/abigail/java/ch-2.java
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+++ b/challenge-120/abigail/java/ch-2.java
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+//
+// See ../README.md
+//
+
+//
+// Run as: ln ch-2.java ch2.java; javac ch2.java; java ch2 < input-file
+//
+
+import java.util.*;
+
+
+public class ch2 {
+    public static void main (String [] args) {
+        int DIFF_PER_MINUTE =  11;  // Half degrees
+        int MIN_PER_HOUR    =  60;
+        int FULL_CIRCLE     = 720;  // Half degrees
+        Scanner scanner = new Scanner (System . in);
+        try {
+            while (true) {
+                String line = scanner . nextLine ();
+                String [] parts = line . split (":");
+                int hours   = Integer . parseInt (parts [0]);
+                int minutes = Integer . parseInt (parts [1]);
+
+                int angle = (DIFF_PER_MINUTE *
+                            (hours * MIN_PER_HOUR + minutes)) % FULL_CIRCLE;
+
+                if (2 * angle >= FULL_CIRCLE) {
+                    angle = FULL_CIRCLE - angle;
+                }
+
+                System . out . print (angle / 2);
+                if (angle % 2 == 1) {
+                    System . out . print (".5");
+                }
+                System . out . print ("\n");
+            }
+        }
+        catch (Exception e) {
+            //
+            // EOF
+            //
+        }
+    }
+}