java值传递与引用传递实例

public class Test2 {

    public static void main(String[] args) {
        int[] arr=new int[5];
        arr[0]=10;
        arr[1]=20;

        change(arr);
        System.out.println("5:"+arr[0]);//10
        System.out.println("6:"+arr[1]);//30
        System.out.println("7:"+arr[2]);//89
        System.out.println("8:"+arr[3]);//0
        System.out.println("9:"+arr[4]);//0
    }
    public static void change(int[] arr){
        arr[1]=30;
        arr[2]=89;
        arr=new int[5];
        arr[0]=300;
        arr[1]=900;
        arr[2]=87;
        arr[3]=67;
        arr[4]=74;
        System.out.println("0:"+arr[0]);//300
        System.out.println("1:"+arr[1]);//900
        System.out.println("2:"+arr[2]);//87
        System.out.println("3:"+arr[3]);//67
        System.out.println("4:"+arr[4]);//74
    }

}