二维数组

import java.util.*;public class Test5 {public static void main (String args[]){int  a[][] ={{2,4,5},{7,9,10},{12,15,17}};System.out.println("请输入一个数检测是否在数组中");Scanner in = new Scanner(System.in) ;boolean flag=false;int key = in.nextInt();for (int i=0;i<a.length;i++){for(int j=0;j<a[i].length;j++){if (a[i][j]==key){flag=true;break;}}if(flag){break;}}if(flag){System.out.println(key+"在数组中！");}else{System.out.println(key+"不在数组中！");}}}