/** * WashMach models the behaviour of a washing * machine by printing strings to represent * actions, clothes being washed, etc. */ class WashMach { private String name; // which machine is it? private String contents; // what's in the machine 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; } }
// This version shows how to use all of the methods // that have been created so far. public class TestWash { public static void main (String[] args) { WashMach myWashMach; myWashMach = new WashMach(); // Give a value to the instance variable myWashMach.setIdentity ("Mr. Clean"); System.out.println ("Your washing machine will now speak to you."); // There are two ways to print the identity myWashMach.printIdentity(); System.out.println ("Identity: machine " + myWashMach.getIdentity()); // Now let's add a sock myWashMach.open(); myWashMach.add ("sock"); myWashMach.close(); myWashMach.start(); // There are two ways to print the contents myWashMach.printContents(); System.out.println ("Machine contains: " + myWashMach.getContents()); } }
Your washing machine will now speak to you. Identity: machine Mr. Clean Identity: machine Mr. Clean The lid is open. Added sock The lid is closed. Start washing ... Contents are clean. Inside you will find sock Machine contains: sock
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