arraysmethoddemo.java

一些小java程序,可做练习用,希望能对你有用

import java.util.Scanner;
import java.util.Arrays;
public class ArraysMethodDemo {
       public static void main(String[] args) {
       Scanner scanner = new Scanner (System.in); 
       int[] arr={93,5,3,55,57,7,2,73,41,91};
      
       System.out.print("paixuqian: ");
        for(int i=0;i< arr.length;i++)
            System.out.print(arr[i] +" ");
            System.out.println();
        Arrays.sort(arr);
        System.out.print("paixuhou:");
      for(int i=0;i< arr.length;i++)
            System.out.print(arr[i] +" ");
       System.out.print("\n shurushousuozhi:");
        int key=scanner.nextInt();
         int find=-1;
         if((find =Arrays.binarySearch(arr,key)) >-1){
          System.out.println("zhaodaozhiyushouyi"+find+"weizi");

           }
        else
            System.out.println("zhaobudaozhidingzhi");
    }
  }