在方法内部修改数组参数的元素

import java.util.Arrays;/*来自 N o  w  J a v a . c o m - 时  代  Java*/


public class Main {


  public static void main(String[] args) {

    int[] origNum = {1, 2, 3};

    String[] origNames = {"Mike", "John"};

    System.out.println("Before method call, origNum:" + Arrays.toString(origNum));

    System.out.println("Before method call, origNames:" + Arrays.toString(origNames));


    // Call methods passing the arrays

    tryElementChange(origNum);

    tryElementChange(origNames);


    System.out.println("After method call, origNum:" + Arrays.toString(origNum));

    System.out.println("After method call, origNames:" + Arrays.toString(origNames));

  }


  public static void tryElementChange(int[] num) {

    // If array has at least one element, store 1116 in its first element

    if (num != null && num.length > 0) {

      num[0] = 6;//时代Java公众号 - N o w J a  v a . c o m 提 供

    }

  }