java数组求最值

import java.util.Scanner;

public class Main {

public static void main(String[] args) {
Scanner sc = new Scanner(System.in);
int [][]a = new int[4][3];
int mark1=0;
int mark2=0;
int mark3=0;
int mark4=0;
for (int i = 0; i < 4; i++) {
for (int j = 0; j < 3; j++) {
a[i][j] = sc.nextInt();
}
}
//12 5 6 4 7 8 9 4 2 3 1 8
for (int i = 0; i < 4; i++) {
for (int j = 0; j < 3; j++) {
System.out.print(" " + a[i][j]);
}
System.out.println();
}

int max = a[0][0];
int min = a[0][0];
for (int i = 0; i < 4; i++) {
for (int j = 0; j < 3; j++) {
if (a[i][j] > max) {
max=a[i][j];
i=mark1;
j=mark2;
}
}
}

for (int i = 0; i < 4; i++) {
for (int j = 0; j < 3; j++) {
if(a[i][j]<min){
min=a[i][j];
mark3=i;
mark4=j;
}
}
}

System.out.println("这个数组的最大值max为 ："+max+" 数组下标为 ："+mark1+","+mark2);
System.out.println("这个数组的最大值min为 ："+min+" 数组下标为 ："+mark3+","+mark4);
}
}