Greeter.java

import java.io.*;
import java.util.*;

public class Greeter {

    /* We can initialize an instance variable
       when we declare it like this:
    */
    //private String greeting="Go away"; 


    private String greeting,happygreeting,sadgreeting; 
    
    public Greeter()  {
	happygreeting = "Nice to meet you";
	sadgreeting = "Leave me alone";
    }

    public Greeter (String happy, String sad) {
	setHappygreeting(happy);
	setSadgreeting(sad);
    }

    public Greeter(String g) {
	setGreeting(g);
    }
    /*
    This needs to be commented out because otherwise there will be two constructors 
    with the same signature. I did not want to delete out any of the previous code 
    already in here.

    public Greeter() {
	setGreeting("Hello");
    }
    */
    public void setHappygreeting(String smile) {
	happygreeting = smile;
    }

    public void setSadgreeting(String frown) {
	sadgreeting = frown;
    }
   
    public void setGreeting(String greet) {
	greeting = greet;
    }

    public String happyGreet(String name) {
	String message; 
	message = happygreeting + " " + name;
	return message;
    }

    public String sadGreet(String name) {
        String message;
	message = sadgreeting + " " + name;
	return message; 
    }
   
    public String greet(String name) {
	String message;
	message = greeting + " " + name;
	return message;
    }


    /* 
       Examples of method overloading. 
       Notice that each method has a
       unique signature, that is, the order and types of the
       parameters are unique. 
       Java doesn't care about the parameter names
    */
    public void f() {
    }
    public void f(String name1)  {
    }
    public void f(String name1, String name2) {
    }
    public void f(String name1, int name2) {
    }
    public void f(int name1, String name) {
    }
    /*
      This one doesn't work because we already
      have a method f with a String, String 
      signature

    public void f(String name2, String name1) {
    }
    */

}