右上三角

import java.util.Scanner;

public class demo01 {
	
   static int num = 1000;
   static int[][] a = new int[num][num];
   static int i = 0;
   static int j = 0;
   static int n = 0;
   static int b = 0;//1111111
   static int c = 1;//2222222
   static int d = 0;//3333333
   static int number = 0;
   static int n1 = 0;
   static int n2 = 0;
   static int n3 = 0;
   
   static //获得数组大小
   void getdemo()
   {
	  Scanner scanner = new Scanner(System.in);
	  System.out.println("请输入一个整数：");
	  num = scanner.nextInt();
   }
   //初始化数组
   static int[][] init(int a[][])
   {
	   getdemo();
	   for(i=0;i<num;i++)
	   {
		   for(j=0;j<num;j++)
		   {
			   a[i][j]=0;			   
		   }		   
	   }
	   return a;
   }
   //数组赋值
   static int assignment(int a[][])
   {
		//第一种bbbbb
	   for(i=0;i<num-b;i++)
	   {
	        if(a[i][i+b]==0)
	        {
		    	a[i][i+b]=++n;	
	        }
	        if(i==num-b-1)
	        {
	            b++; 		
	            number++;     	  
	        }
	   }
	   //第二种ccccccc
	   for(i=num-c,j=num-c;i>=0;i--)
	   {
		   if(a[i][j]==0)
		   {
			   a[i][j]=++n;
		   }
		   if(i==0)
		   {
			   c++;
			   number++;
		   }
	   }
	   //第三种ddddd
	   for(i=d,j=num-1;j>=d;j--)
	   {
		   if(a[i][j]==0)
		   {
			   a[i][j]=++n;
		   }
		   if(j==d)
		   {
			   d++;
			   number++;
		   }
	   }
	   return number;
   }
   
   //打印数组
   static void display(int a[][])
   {
	   //初始化数组
	   init(a);
	   //赋值数组
	   while(number<num)
	   {
	     assignment(a);
	   }
	   for(i=0;i<num;i++)
	   {
		   for(j=0;j<num;j++)
		   {
			 
			   System.out.print(" "+a[i][j]+" ");				   
		   }
		
		  System.out.println("");  			   
		   	
	   }
	   
   }
   public static void main(String[] args) {
	
	   display(a);
   }

}