Java String Instantiation

Question

Why is this code returning \"false\" instead of \"true\":

package com.company;


public class Main {

    public static void main(String[] args) {

        S         


        

Answer 1

String Constant Pool create at compiling-time. it only using strings from pool when you concat String literals / final variables / final fields except final parameters, for example:

Concat Literals

String fullName = "Name Lastname";
String firstNamePlusLastName = "Name " + "Lastname";

System.out.println(fullName == firstNamePlusLastName);// true

Concat Final Variables

String fullName = "Name Lastname";
final String name = "Name ";
final String lastName = "Lastname";
String firstNamePlusLastName = name + lastName;

System.out.println(fullName == firstNamePlusLastName);//true