inject in java

  public void testInject() {
    List ints = Arrays.asList(new Integer[]{new Integer(1), new Integer(2), new Integer(3)});
    SumAccumulator acc = new SumAccumulator();
    CollectionUtils.forAllDo(ints, acc);
    assertEquals(6, acc.result);
  }
  
  static class SumAccumulator implements Closure {
    public int result;
    public void execute(Object arg0) {
      result += ((Integer) arg0).intValue();
    }
  }