02. Типы данных в Java. Работа со строками и числами.

String s1 = "Hello, World";
String s2 = "test";
System.out.println("Comparing s1 and s2");
System.out.println(s1 == s2);
System.out.println(s1.equals(s2));

System.out.println("Comparing s1 and s3");
String s3 = new String(s1);
System.out.println(s1 == s3);
System.out.println(s1.equals(s3));

System.out.println("Interning s1 and s3");
System.out.println(s1 == s3.intern());

System.out.println("Comparing concatenated strings");
String s4 = s1+"!";
System.out.println(s4 == s1+"!");
System.out.println(s4 == (s1+"!").intern());
System.out.println(s4.intern() == (s1+"!").intern());
System.out.println(s4.equals(s1+"!"));