CSC108 Lecture #3 Example

WashMach.java

/**
 * WashMach models the behaviour of a washing machine by printing
 * strings to represent actions, clothes being washed, etc.
 */
class WashMach {

	// ----- constructors -----
	public WashMach () {
		name = "";
		contents = "";
	}
	public WashMach (String newName) {
		name = newName;
		contents = "";
	}

	// ----- methods -----
	public void open () {
		System.out.println ("The lid is open.");
	}
	
	public void close () {
		System.out.println ("The lid is closed.");
	}
	
	public void start () {
		System.out.println ("Start washing ...");
		System.out.println ("Contents are clean.");
	}
	
	public void printIdentity () {
		System.out.println("Identity: machine "+name);
	}
	
	public void setIdentity (String id) {
		name = id;
	}
	
	public String getIdentity () {
		return name;
	}
	
	public void add (String item) {
		System.out.println ("Added " + item);
		contents = item;
	}
	
	public void printContents () {
		System.out.println("Inside you will find " + contents);
	}
	
	public String getContents () {
		return contents;
	}

	// ----- instance variables -----

	private String name;  // which machine is it?
	private String contents; // what's in the machine
}

TestWash2.java

// This version shows how to use the
// constructors to create two washing machines. 

public class TestWash2 {

    public static void main (String[] args) {	

	WashMach myWashMach, yourWashMach;

	myWashMach = new WashMach ("55");
	yourWashMach = new WashMach ();

	System.out.println ("My washing machine:");
	myWashMach.printIdentity();

	System.out.println ("Your washing machine:");
	yourWashMach.printIdentity();

	// Set names of washing machines
	yourWashMach.setIdentity ("108");
	myWashMach.setIdentity ("56");

	// Now let's add something to each machine
	myWashMach.add ("sock");
	yourWashMach.add ("towel");

	// Print names & contents of each machine
	System.out.println ("My washing machine:");
	myWashMach.printIdentity();
	myWashMach.printContents();

	System.out.println ("Your washing machine:");
	yourWashMach.printIdentity();
	yourWashMach.printContents();
    }
}

Output

My washing machine:
Identity: machine 55
Your washing machine:
Identity: machine
Added sock
Added towel
My washing machine:
Identity: machine 56
Inside you will find sock
Your washing machine:
Identity: machine 108
Inside you will find towel