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]);//
         System.out.println("6:"+arr[1]);//
         System.out.println("7:"+arr[2]);//
         System.out.println("8:"+arr[3]);//
         System.out.println("9:"+arr[4]);//
     }
     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]);//
         System.out.println("1:"+arr[1]);//
         System.out.println("2:"+arr[2]);//
         System.out.println("3:"+arr[3]);//
         System.out.println("4:"+arr[4]);//
     }

 }