DummyClass.java

public class DummyClass {
    
    String hello ="Hello";
    String bye = "Bye";
    
    void mymethod1(){
        
        // Note that mymethod2() and this.mymethod2() are the same thing.
        String s1 = mymethod2("Sang Shin");
        String s2 = this.mymethod2("Sang Shin");
        
        System.out.println("s1 = " + s1 + " s2 = " + s2);
        
        // Pass the current object instance as a parameter
        String s3 = this.mymethod3(this, this.hello);
        System.out.println("s3 = " + s3);
        
        s3 = this.mymethod3(this, this.bye);
        System.out.println("s3 = " + s3);
    }
    
    String mymethod2(String name){
        return "Hello " + name;
    }
    
    String mymethod3(Object o1, String s){
        return s + " " + o1.getClass().getName();
    }
    
}