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palindromeNumber.java
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palindromeNumber.java
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/**
* Created by codingBoy on 17/2/4.
*/
public class palindromeNumber
{
/**
*this is my first wrong solution.
*/
// public static void main(String[] args) {
// boolean isPalindrome = isPalindrome(2345432);
// System.out.println(isPalindrome);
// }
// public static boolean isPalindrome(int x) {
// if(x % 10 == 0)
// {
// return false;
// }
// int y=0;
// int z=x;
// while(z!=0)
// {
// y=y*10+z%10;
// z=z/10;
// }
// System.out.println(y);
// if(y==x)
// {
// return true;
// }else{
// return false;
// }
// }
//this is the right solution.
public static void main(String[] args)
{
boolean isPalindrome=isPalindrome(5);
System.out.println(isPalindrome);
}
public static boolean isPalindrome(int x) {
if(x<0 || (x!=0 && x%10==0))
{
return false;
}
int rev=0;
while(x>rev)
{
rev=rev*10 + x%10;
x=x/10;
}
return (x==rev||x==rev/10);
}
}