crap.java

告诉你如何利用排序算法简单的编java程序

import java.awt.*;
import java.awt.event.*;
import javax.swing.*;

public class Craps extends JApplet implements ActionListener{
	
	final int WON=0,LOST=1,CONTINUE=2;
	
	boolean firstRoll=true;
	int sumOfDice=0;
	int myPoint=0;
	int gameStatus=CONTINUE;
	
	JLabel die1Label,die2Label,sumLabel,pointLabel;
	JTextField die1Field,die2Field,sumField,pointField;
	JButton rollButton;
	
	public void init()
	{
		Container container=getContentPane();
		container.setLayout(new FlowLayout());
		
		die1Label=new JLabel("Die 1");
		container.add(die1Label);
		die1Field=new JTextField(10);
		die1Field.setEditable(false);
		container.add(die1Field);
		
		die2Label=new JLabel("Die 2");
		container.add(die2Label);
		die2Field=new JTextField(10);
		die2Field.setEditable(false);
		container.add(die2Field);
		
		sumLabel=new  JLabel("Sum is");
		container.add(sumLabel);
		sumField=new JTextField(10);
		sumField.setEditable(false);
		container.add(sumField);
		
		pointLabel=new JLabel("Point is");
		container.add(pointLabel);
		pointField=new JTextField(10);
		pointField.setEditable(false);
		container.add(pointField);
		
		rollButton=new JButton("Roll Dice");
		rollButton.addActionListener(this);
		container.add(rollButton);	
	}
	
	public void actionPerformed(ActionEvent actionEvent)
	{
		if(firstRoll){
			
			sumOfDice=rollDice();
			
			switch(sumOfDice){
				
				case 7:case 11:
					gameStatus=WON;
					pointField.setText(" ");
					break;
					
				case 2:case 3:case 12:
					gameStatus=LOST;
					pointField.setText(" ");
					break;
					
				default:
					gameStatus=CONTINUE;
					myPoint=sumOfDice;
					pointField.setText(Integer.toString(myPoint));
					firstRoll=false;
					break;
			}
		}
	
		else{
			sumOfDice=rollDice();
			if(sumOfDice==myPoint)
				gameStatus=WON;
			else
				if(sumOfDice==7)
					gameStatus=LOST;
		}
		
		displayMessage();
	}
	
	public int rollDice()
	{
		int die1,die2,sum;
		
		die1=1+(int)(Math.random()*6);
		die2=1+(int)(Math.random()*6);
		sum=die1+die2;
		
		die1Field.setText(Integer.toString(die1));
		die2Field.setText(Integer.toString(die2));
		sumField.setText(Integer.toString(sum));
		
		return sum;
		
	}
	
	public void displayMessage()
	{
		if(gameStatus==CONTINUE)
			showStatus("Roll again.");
		else{
			if(gameStatus==WON)
				showStatus("Player wins."+"Click Roll Dice to play again.");
			else
				showStatus("Player loses."+"Click Roll Dice to play again.");
			
			firstRoll=true;
		}	
	}
	
}