Simple if statement with loop issue [duplicate]

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• How do I compare strings in Java? 23 answers

I have an if statement here and there are no errors but it gives the wrong result:

Initial Code

import java.util.Scanner;

public class Decision {

public static void main(String args[]){

    String enter;

    Scanner inputanswer = new Scanner(System.in);

    System.out.println("welcome to a test");
    System.out.println("proceed? yes or no?");

    String decision1 = inputanswer.nextLine();  

    if ( decision1 == "yes" ){

        System.out.println("lets proceed");

    } else if ( decision1 == "no" ){

        System.out.println("Quitting now");

    } else {

        System.out.println("invalid");
    }

}

}

so when I type in yes or no for example it still comes out as invalid.

Also can someone help me put this in a loop so that when they do an invalid statement it resets to the question.