随机函数

import java.awt.*;
public  class saolei
{
    public int w,h,i,j;
    //初始化数组

    public saolei()
    {
        int a[][]=new int[10][10];
       for( i=0;i<10;i++)
             {
               for( j=0;j<10;j++)
                a[i][j]=0;
               
              }
            
            
    //产生随机数   
      
         for( i=0;i<10;i++)
             {
              
      
              w=(int)(Math.random()*10);
              h=(int)(Math.random()*10);
      
             System.out.print(h+" ");
             System.out.printf(w+"  ");
           
            
            
             a[w][h]=-1;
              System.out.printf(a[w][h]+"  ");
                  
              System.out.println();
              
      
              }
            
              //输出
           
              for(i=0;i<10;i++)
              {
                  for(j=0;j<10;j++)
                 
                  if(i==h&&j==w)
                 
                  System.out.printf(a[w][h] +"  ");
                  else
                  System.out.printf(a[i][j] +"  ");
                  System.out.println();
                 
              }
   
    }
    public static void main(String arg[])
    {

      saolei s=new saolei();
   
    }
}