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);   }}