j2k: flatten test cases and testData directory structure

Move j2k/test/tests -> j2k/tests, j2k/test/testData -> j2k/testData

j2k/testData/fileOrElement/objectLiteral/MyFrame.java

@@ -0,0 +1,33 @@
+//file
+package demo;
+
+interface WindowListener {
+  void windowClosing ();
+}
+
+class WindowAdapter implements WindowListener {
+  public void windowClosing () {
+  }
+}
+
+class Frame {
+  public void addWindowListener(WindowListener listener){}
+}
+
+public final class Client extends Frame {
+  Client() {
+    WindowAdapter a = new WindowAdapter() {
+      @Override
+      public void windowClosing () {
+      }
+    };
+
+    addWindowListener(a);
+
+    addWindowListener(new WindowAdapter() {
+      @Override
+      public void windowClosing () {
+      }
+    });
+  }
+}