一个JAVA数组的问题

该程序有bug，需要我再改改
public class TestArray {
public static void main(String[] args) {
int[][] array = {{1,12,23,1},{3,4,23,2},{5,6,56,312}};
int max =array[0][0];
int max_x = 0;
int max_y = 0;
int min =array[0][0];
int min_x = 0;
int min_y = 0;
for(int i = 0;i<array.length;i++){
for(int j=0;j<array[i].length;j++){
if(array[i][j]>max){
max = array[i][j];
max_x = i;
max_y = j;
}
if(array[i][j]<min){
min = array[i][j];
min_x = i;
min_y = j;
}
}
}
System.out.println("二维数组中最大的元素是："+max+" 所在行号为"+max_x+"所在列号为："+max_y);
System.out.println("二维数组中最小的元素是："+min+" 所在行号为"+min_x+"所在列号为："+min_y);
}
}

int min = array[0][0];//最小值
int max = array[0][0];//最大值
int minhang=0,minlie=0；//最小值的行列
int maxhang=0,ma