Problem 4 求回文数

A palindromic number reads the same both ways. The largest palindrome made from the product of two 2-digit numbers is 9009 = 91*99. Find the largest palindrome made from the product of two 3-digit numbers.

Answer:

906609

 

public class Palindromic {public static void main(String args[]){int max=0;int mul=0;int ch=0;for(int i=999;i>100;i--){for(int j=999;j>100;j--){mul=i*j;if(isPalindromic(mul)){ch=mul;if(max<=ch){max=ch;}}}}System.out.println(max);}public static boolean isPalindromic(int num){StringBuffer sb=new StringBuffer(""+num);int num2=Integer.parseInt(sb.reverse().toString());if(num==num2){return true;}return false;}}