Copy an array

• Write code to implement ArrayCopy (content copy) arraycopy.java
• willInt [] arr1 = {10, 30};Copy toarr2Arrays require that the data space be independent.

   	int[] arr1 = {10.20.30};

    // Create a new array arr2 to create a new data space
    / / size arr1. Length;
    int[] arr2 = new int[arr1.length];

    // Iterate over arr1, copying each element to its arR2 location
    for(int i = 0; i < arr1.length; i++) {
       arr2[i] = arr1[i];
    }

    // Modify ARR2, arR1 will not be affected.
    arr2[0] = 100;

    / / output arr1
    System.out.println("=== elements of ARr1 ===");
    for(int i = 0; i < arr1.length; i++) {
        System.out.println(arr1[i]);//10,20,30
    }
    / / output arr2
    System.out.println("==== Elements of arr2 ====");
    for(int i = 0; i < arr2.length; i++) {
        System.out.println(arr2[i]);//100,20,30
    }
Copy the code