上代码：

package hello;import java.util.Scanner;public class Main {public static void main(String[] args) {Scanner in = new Scanner(System.in);int mat[][] = new int[3][3];for (int i=0;i<3;i++) {for (int j=0;j<3;j++) {mat[i][j] = in.nextInt();}}boolean flag = false;int row = 0;int max = 0;while (!flag&&row<mat.length) {max = 0;for (int j=1;j<mat[row].length;j++)if (mat[row][j]>mat[row][max]) max = j;boolean yes = true;int j = 0;while (yes&&j<mat.length) {if (j!=row&&mat[j][max]<mat[row][max])yes = false;j++;}if (yes)flag = true;else row++;}if (flag)System.out.println("鞍点是"+mat[row][max]);elseSystem.out.println("没有鞍点");}
}