矩阵的构造，矩阵构造,import java.

矩阵的构造，矩阵构造,import java.

import java.util.Scanner;public class x2{   public static void main(String args[])   {     int i,j,n;     Scanner lin=new Scanner(System.in);     n=lin.nextInt();     System.out.println("n="+n);     System.out.println("开始输入数据:");     int a[][]=new int[n][n];     for(i=0;i<=n-1;i++)     {         for(j=0;j<=n-1;j++)         {             a[i][j]=lin.nextInt();         }     }        System.out.println("数据输入完成!");     for(i=0;i<=n-1;i++)     {         for(j=0;j<=n-1;j++)         {             System.out.print(" "+a[i][j]+" ");         }         System.out.println();     }   }}//该片段来自于http://byrx.net