Always returns false:

[Scriptr]

I have a method to test if a number is palendromic (the function is public boolean isPalen(int n))

It always returns false. Even if I change main to pass in a palendromic number directly.
Why? Can someone give me some tips?

public class Main {
	public static void main(String args[]){
		System.out.println("Starting....");
		Thread t1 = new Thread(){
			public void run(){
				new Main().loop(10,99);
			}
		};
		t1.start();
		System.out.println("Done!");
	}
	public void loop(int l, int h){
		for(int ih = l; ih <= h; ih++){
			for(int il = 10; il < 100; il++){
				if(isPalen(ih * il))
					System.out.println("\t" + ih * il);
			}
		}
	}
	public boolean isPalen(int n){
		String s1 = Integer.toString(n);
		String s2 = reverse(s1);
		
		return (s1 == s2);
		
	}
	public String reverse(String s) {
	    return new StringBuffer(s).reverse().toString();
	}
}

[Fou-Lu]

return (s1 == s2); compares the memory space of two objects. Strings cannot be compared this way, you must use s1.equals(s2).