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
}
}
