Use the string comparison in Java again

Novice problem, but I have this Code:

import java.util.*;
import java.io.*;

public class Welcome1  
{
   // main method begins execution of Java application
   public static void main( String[] args )
   {
      String confirm = "y";
      while(confirm=="y")
      {
         System.out.println( "Welcome to Java Programming!" );
         System.out.println( "Print Again? (y/n)" );
         Scanner input = new Scanner(system.in);
         confirm = input.nextLine();
      }
   }
}

I just need to print the welcome message again when the user enters "Y" But it doesn't work Any ideas?

Solution

In Java, use = = to compare the equality of basic types (int, long, Boolean, etc.), and use the equals () method to compare the equality of object types (string, etc.) If you use = = to compare two object types, you need to check the identity, not equality - that is, you will verify that the two objects share exactly the same reference (and therefore the same object) in memory; In general, all you need is to verify that their values are the same. For this purpose, you use equals()

As a good programming practice, it is better to compare such strings and flip the order of strings:

while ("y".equals(confirm)) {

In this way, you can ensure that the comparison will work and avoid the potential NullPointerException even if it is confirmed to be null