java,求救!利用随机函数生成矩阵；对角线求和；每行最小数及位置

java,求救!利用随机函数生成矩阵；对角线求和；每行最小数及位置

import java.util.ArrayList;import java.util.List;import java.util.Random;public class Matrix {private int i;private int j;private List rows;public Matrix(int i,int j){this.i = i;this.j = j;rows = new ArrayList();for(int r = 0; r List tempList = new ArrayList();for(int c = 0; c int temp = new Random().nextInt(100);tempList.add(temp);}this.rows.add(tempList);}}public void show(){for(int r = 0; r List row = (List)rows.get(r);System.out.print('[');int c = 0;for(;c System.out.print( row.get(c) + \t);}System.out.println(row.get(c) + ]);}}public int diagonal(){if(i == j){int result = 0;for(int r = 0; r result += rows.get(r).get(r);}return result;}else{return -1;}}public int getMin(int rr){int r = rr - 1;List row = rows.get(r);int min = row.get(0);for(int c = 0; c if(row.get(c) min = row.get(c);}}return min;}public String getPos(int rr){int r = rr - 1;return + rr + , + (rows.get(r).indexOf(getMin(rr)) + 1);}}public class Test {public static void main(String[] args) {Matrix m = new Matrix(5,7);//5行7列m.show();//显示矩阵System.out.println(m.getMin(1));//第1行最小值System.out.println(m.getPos(1));//第一行最小值位置}}[55 60 63 15 74 56 50][6

我好好复习下