package youxiangtu;import java.io.*;public class YXTu{   static public void main(String[] args){         int i=0,j=0, n=0;     int[][] m = new int[100][100];     System.out.print("請輸入n*n矩陣的n值:");     try {       BufferedReader by = new BufferedReader(new InputStreamReader(System.in));       String s1 = by.readLine();       n = Integer.parseInt(s1);            //鍵盤讀入n       for (i = 0; i < n; i++)                 //生成隨機矩陣         for (j = 0; j < n; j++) {           m[i][j] = (int) (Math.random() * 2);     //控制產(chǎn)生0與1           System.out.print(m[i][j] + "");           if ( (j + 1) % n == 0) System.out.print("\n");         }       System.out.println(" 各個頂點的度為：");     for (i = 0; i < n; i++) {   //輸出各個頂點的度            int sum=0;             for (j = 0; j < n; j++){               if (m[i][j] == 1)              sum = sum + m[i][j];            } System.out.println("頂點V"+i+"的度為:"+sum);                 }         }catch (Exception e){      }     } }