How do I make if(answer=="yes") work out? [duplicate]

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• How do I compare strings in Java? 23 answers

import java.util.Scanner;

public class testing {

public static void main(String args[]) {

String answer;

System.out.println("Answer with a yes or no.");
Scanner in = new Scanner(System.in);
answer=in.nextLine();

if (answer=="yes") {
    System.out.println("Sounds like fun! Wait for me!"); }
else if (answer=="no") {
    System.out.println("Hm..that might be a good choice."); }
else {
 System.out.println("Are you speaking alien language?"); }
}

}

Even though I type in "yes" or even "no" in the console, it only comes out as the else: "Are you speaking alien language?"

How do I make "Sounds like fun! Wait for me!" to come out if I type in "yes"?