Java 数组复制

public static void main(String[] args) {
        int[]array1,array2;
        array1 = new int[] {6,3,5,8,9,5,17,5,58,56};
        
        for(int i =0; i<array1.length;i++)
        {
            System.out.print(array1[i]+" ");
        }
        System.out.println();

        //赋值array2变量等于array1
        //不能称作 数组 复制
        array2 = array1;    //地址赋值
        //修改array2中的 偶索引元素，使其等于索引值（如array[0] = 0,array[2] = 2）
        
        for(int i =0; i<array2.length;i++)
        {
            if(i % 2==0)
            {
                array2[i] = i;
            }
        }
        //System.out.println();
        

        for(int i =0; i<array1.length;i++)
        {
            System.out.print(array1[i]+" ");
        }
        System.out.println();
        
        System.out.println();
        
        
        
        //数组的复制：
        int[]array3,array4;
        array3 = new int[] {6,3,5,8,9,5,17,5,58,56};
        
        for(int i =0; i<array3.length;i++)
        {
            System.out.print(array3[i]+" ");
        }
        //System.out.println();
        
        
         //数组的复制
        array4 = new int[array3.length];
        for(int i =0;i <array4.length;i++)
        {
            array4[i] = array3[i];
        }
        
        
        
        
        //修改array4中的 偶索引元素，使其等于索引值（如array[0] = 0,array[2] = 2）
        for(int i =0; i<array4.length;i++)
        {
            if(i % 2==0)
            {
                array4[i] = i;
            }
        }
        System.out.println();
        

        for(int i =0; i<array3.length;i++)
        {
            System.out.print(array3[i]+" ");
        }
        System.out.println();
            
        
        
        
        System.out.println();
        String[] arr = new String[] {"AA","BB","CC","DD","EE","FF"};
        for(int i =0; i <arr.length;i++)
        {
            System.out.print(arr[i]+"  ");
        }
        System.out.println();
        
        //复制的操作
         String[] arr2 = new String[arr.length] ;
         for(int i =0; i<arr.length;i++)
         {
             arr2[i] = arr[i];
         }
        
        for(int i =0; i <arr2.length;i++)
        {
            System.out.print(arr2[i]+"  ");
        }
        System.out.println();