What is the deep copy method of one-dimensional array in java

1. Three methods

(1) Call clone

(2) Call System.arraycopy

The above two methods are suitable for basic types The effect is the same as object type data.

(3) Use a FOR loop to copy each element of the array. (Pay attention to calling the clone method)

2. Example

       Object[] src = new Object[]{ new String("Zhao"),
                                        Integer.valueOf(1),
                                        Integer.valueOf(2),
                                        Integer.valueOf(3),
                                        Integer.valueOf(4)};                               
       Object[] dest = src.clone();                //1.拷贝数据       
        // Object[] dest = new Object[5];
        // System.arraycopy(src, 0, dest, 0, dest.length);       
        System.out.println( dest.equals(src));
       System.out.println( dest == src );
       for (int i = 0; i < dest.length; i++) {
           System.out.print( dest[i]+", " );     
           dest[i] = new String("KE");               //2.改变新数组内容                  
            System.out.print( dest[i]+", " );        
            System.out.println( src[i]+",");          //3.不影响原始数组
        }
       System.out.println();

Note: A deep copy in a one-dimensional array is only a shallow copy in a multi-dimensional array.

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