Java数组集合的深度复制代码实例

public static void arraycopyTest() {
 
  int[] arr = {1,2,3};
  int[] array = new int[arr.length];
  System.arraycopy(arr,0,array,0,arr.length);
  array[1] = 0;
  array[2] = 0;
  System.out.println(Arrays.toString(arr));
  System.out.println(Arrays.toString(array));
 
}

public static void hashMapcopyTest() {
 
  Map srcMap = new HashMap<String,String>();
  srcMap.put("1","test1");
  srcMap.put("2","test2");
  srcMap.put("3","test3");
  Map destMap = new HashMap();
  destMap.putAll(srcMap);
  destMap.remove("1");
  destMap.remove("2");
  System.out.println(srcMap.toString());
  System.out.println(destMap.toString());
}