构造一个m行n列的二维数组(mln的取值均小于等于4, mln均由键盘输入),并由键盘输入数组元素的值,并且按照矩阵的形式输出

Scanner sc = new Scanner(System.in);
System.out.println("请输入行");
int m = sc.nextInt();
System.out.println("请输入列");
int n = sc.nextInt();
System.out.println(m+"行"+n+"列");
brr= new int[m][n];
for (int i = 0; i < m; i++){for (int j = 0; j < n; j++){System.out.println("请输入第行"+(i+1)+"第"+(j+1)+"列");brr[i][j] = sc.nextInt();}
}for (int i = 0; i < brr.length; i++){for (int j = 0; j

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