String.intern()

class Main {
    public static void main(String[] args) {
        System.out.println("Hello World!");
        
        String s = new StringBuilder("ja").append("va").toString();
        System.out.println(s.intern() == s);
        
        String ss = new StringBuilder("ja").append("va1").toString();
        System.out.println(ss.intern() == ss);
        
        String sss = new StringBuilder("go").append("od").toString();
        System.out.println(sss.intern() == sss);
        
        System.out.println("==================================");
        
        
        String s4 = "go";
        System.out.println(s4.intern() == s4);//true
        
        String s5 = new String("go");
        System.out.println(s5.intern() == s5);//false
        System.out.println(s5.intern() == s4);//true
        
    }
}