test/jdk/java/util/Collections/Rotate.java

*** 1,7 ***
  /*
!  * Copyright (c) 2000, Oracle and/or its affiliates. All rights reserved.
   * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
   *
   * This code is free software; you can redistribute it and/or modify it
   * under the terms of the GNU General Public License version 2 only, as
   * published by the Free Software Foundation.
--- 1,7 ---
  /*
!  * Copyright (c) 2000, 2026, Oracle and/or its affiliates. All rights reserved.
   * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
   *
   * This code is free software; you can redistribute it and/or modify it
   * under the terms of the GNU General Public License version 2 only, as
   * published by the Free Software Foundation.

*** 24,13 ***
--- 24,16 ---
  /*
   * @test
   * @bug 4323074
   * @summary Basic test for new rotate algorithm
   * @key randomness
+  * @library /test/lib
   */
  
+ import jdk.test.lib.valueclass.VClass;
  import java.util.ArrayList;
+ import java.util.Arrays;
  import java.util.Collections;
  import java.util.LinkedList;
  import java.util.List;
  import java.util.Random;
  import java.util.Vector;

*** 67,7 ***
--- 70,12 ---
                      if (((Integer)lst.get(k)).intValue() != index)
                          throw new Exception("j: "+j+", lst["+k+"]="+lst.get(k)+
                                              ", should be "+index);
              }
          }
+ 
+         List<VClass> vl = new ArrayList<>(Arrays.asList(new VClass(1, new int[] { 1 }), new VClass(2, new int[] { 2 }), new VClass(3, new int[] { 3 }), new VClass(4, new int[] { 4 })));
+         Collections.rotate(vl, 1);
+         if (!vl.equals(Arrays.asList(new VClass(4, new int[] { 4 }), new VClass(1, new int[] { 1 }), new VClass(2, new int[] { 2 }), new VClass(3, new int[] { 3 }))))
+             throw new RuntimeException("value rotate failed");
      }
  }