更新test1.java

test1.java

+package day1;
+
+import jdk.jshell.execution.Util;
+import java.util.Random;
+import javax.xml.transform.stream.StreamSource;
+import java.awt.*;
+
+public class test1 {
+    public static void main(String[] args){
+        int N=1001;
+        int[] arr=new int [N];
+        for(int i=0;i<arr.length-1;i++){
+            arr[i]=i+1;
+        }
+        arr[arr.length-1]=new Random().nextInt(N-1)+1;
+        int index=new Random().nextInt(N);
+        int swap= arr[index];
+        arr[index]=arr[arr.length-1];
+        arr[arr.length-1]=swap;
+        System.out.print("[");
+        for (int i = 0; i <arr.length-1 ; i++) {
+            System.out.print(arr[i]+",");
+        }
+        System.out.println(arr[arr.length-1]+"]");
+        int x1=0;
+        for (int i = 1; i <=N-1 ; i++) {
+            x1=(x1^i);
+        }
+        for (int i = 0; i < N; i++) {
+            x1=x1^arr[i];
+        }
+        System.out.println(x1);
+    }
+}