Charlie

import java.awt.Container;import java.awt.BorderLayout;import java.awt.GridLayout;import java.awt.Color;import java.awt.event.ActionListener;import java.awt.event.ActionEvent;import java.awt.event.MouseAdapter;import java.awt.event.MouseEvent;import javax.swing.event.ChangeListener;import javax.swing.event.ChangeEvent;import javax.swing.*;// package life;public class MainApp {	static JButton[][] gridCell;	static JLabel turnCountDisplay = new JLabel("0",SwingConstants.CENTER);	static int rows;	static int turnCount = 0;	static int turnSpeed = 2000;	static boolean running = false;	static ActionListener taskPerformer = new ActionListener() {		public void actionPerformed(ActionEvent evt) {			doUpdate(gridCell);			turnCount++;			turnCountUpdate();		}	};	public static void main(String[] args) {		if (args.length > 0) {			try {				rows = Integer.parseInt(args[0]);			} catch (NumberFormatException except) {				System.err.println("The first parameter should be a number");				System.exit(0);			}		} else {			rows = 40;		}		javax.swing.SwingUtilities.invokeLater(new Runnable() {			public void run() {				if (rows > 2) {					lifeWindow(rows);				} else {					System.out.println("Must choose grid size of at least 3");				}			}		});	}	static Timer t = new Timer(turnSpeed, taskPerformer);	static class ButtonListener implements ActionListener {		public void actionPerformed(ActionEvent event) {			t.setInitialDelay(0);			JButton sent = (JButton)event.getSource(); // the button pressed			String label = sent.getText();           // the button's label			if (label.equals("Clear") && !running) {				turnCount = 0;				turnCountUpdate();				for (int i=0; i < rows; i++) {					for (int j=0; j < rows; j++) {						gridCell[i][j].setBackground(Color.gray);					}				}				t.setRepeats(true);			} else if (label.equals("Step") && !running) {				running = true;				t.setRepeats(false);				t.start();				running = false;			} else if (label.equals("Run") && !running) {				sent.setText("Pause");				t.setRepeats(true);				t.start();				running = true;			} else if (label.equals("Pause")) {				sent.setText("Run");				t.stop();				running = false;			} else if (label.equals("Stop") && !running) {				System.exit(0);			}		}	}	public static void turnCountUpdate() {		turnCountDisplay.setText(String.valueOf(turnCount));	}	public static void doUpdate(JButton[][] gridCell) {		int[][] hold = new int[rows][rows];		for (int i=0; i < rows; i++) {			for (int j=0; j < rows; j++) {				hold[i][j] = getColourValue(gridCell[i][j]);			}		}		processValues(hold);		for (int i=0; i < rows; i++) {			for (int j=0; j < rows; j++) {				gridCell[i][j] = putColourValue(hold[i][j]);			}		}	}	public static void processValues(int[][] values) {		int[] surroundingCellData = new int[8];		for (int i=0; i < rows; i++) {			for (int j=0; j < rows; j++) {				surroundingCellData[0] = values[transCoOrd(i-1)][transCoOrd(j-1)];				surroundingCellData[1] = values[transCoOrd(i-1)][transCoOrd( j )];				surroundingCellData[2] = values[transCoOrd(i-1)][transCoOrd(j+1)];				surroundingCellData[3] = values[transCoOrd( i )][transCoOrd(j-1)];				surroundingCellData[4] = values[transCoOrd( i )][transCoOrd(j+1)];				surroundingCellData[5] = values[transCoOrd(i+1)][transCoOrd(j-1)];				surroundingCellData[6] = values[transCoOrd(i+1)][transCoOrd( j )];				surroundingCellData[7] = values[transCoOrd(i+1)][transCoOrd(j+1)];				int redCount = 0;				int greenCount = 0;				for (int k=0; k < surroundingCellData.length; k++) {					if (surroundingCellData[k] == 1)		{ redCount++;   }					else if (surroundingCellData[k] == 2)	{ greenCount++; }				}				if (((redCount + greenCount) >= 4) || ((redCount + greenCount) <= 1)) {					values[i][j] = 0;				} else if (((redCount + greenCount) == 3) && (values[i][j] == 0)) {					if (redCount > greenCount) { values[i][j] = 1; }					else { values[i][j] = 2; }				}			}		}	}	public static int transCoOrd(int CoOrd) {		if (CoOrd == -1) {			CoOrd = CoOrd + rows;		} else if (CoOrd == rows) {			CoOrd = CoOrd - rows;		}		return CoOrd;	}	public static int getColourValue(JButton button) {		if (button.getBackground() == Color.red) {			return 1;		} else if (button.getBackground() == Color.green) {			return 2;		} else {			return 0;		}	}	public static JButton putColourValue(int colour) {		JButton newButton = new JButton();		if (colour == 1) {			newButton.setBackground(Color.red);		} else if (colour == 2) {			newButton.setBackground(Color.green);		} else {			newButton.setBackground(Color.gray);		}		return newButton;	}	public static void lifeWindow(int rows) {		gridCell = new JButton[rows][rows];			MouseButtonControl mouseListen = new MouseButtonControl();			for (int i=0; i < rows; i++) {				for (int j=0; j < rows; j++) {					gridCell[i][j] = new JButton();					gridCell[i][j].addMouseListener(mouseListen);				}			}		JButton clearBtn = new JButton("Clear");		JButton stepBtn = new JButton("Step");		JButton runBtn = new JButton("Run");		JButton stopBtn = new JButton("Stop");			ButtonListener listen = new ButtonListener();			clearBtn.addActionListener(listen);			stepBtn.addActionListener(listen);			runBtn.addActionListener(listen);			stopBtn.addActionListener(listen);		JFrame frame = new JFrame();			frame.setSize(500,500);			Container contentPane = frame.getContentPane();				JPanel cellGrid = new JPanel();				JPanel buttonPanel = new JPanel();		cellGrid.setLayout(new GridLayout(rows,rows,0,0));			for (int i=0; i < rows; i++) {				for (int j=0; j < rows; j++) {					cellGrid.add(gridCell[i][j]);					gridCell[i][j].setBackground(Color.gray);				}			}			cellGrid.setBorder(BorderFactory.createEmptyBorder(0,10,0,0));		JSlider slide = new JSlider(JSlider.VERTICAL,1,10,1);			slide.setMajorTickSpacing(1);			slide.setMinorTickSpacing(1);			slide.setPaintTicks(true);			slide.setPaintLabels(true);			slide.setBorder(BorderFactory.createEmptyBorder(10,10,10,10));		buttonPanel.add(clearBtn);		buttonPanel.add(stepBtn);		buttonPanel.add(runBtn);		buttonPanel.add(stopBtn);		contentPane.add(turnCountDisplay,BorderLayout.NORTH);		contentPane.add(cellGrid,BorderLayout.CENTER);		contentPane.add(slide,BorderLayout.EAST);		contentPane.add(buttonPanel,BorderLayout.SOUTH);		slide.addChangeListener(new ChangeValue());		frame.setVisible(true);	}	static class ChangeValue implements ChangeListener {		public void stateChanged(ChangeEvent expn) {			JSlider source = (JSlider)expn.getSource();			if (!source.getValueIsAdjusting()) {					t.setDelay(2000 / (int)source.getValue());			}		}	}	static class MouseButtonControl extends MouseAdapter {		public void mousePressed(MouseEvent event) {			JButton cell = (JButton)event.getSource();			if (!running) {				if (SwingUtilities.isLeftMouseButton(event)) {					cell.setBackground(Color.red);				} else if (SwingUtilities.isRightMouseButton(event)) {					cell.setBackground(Color.green);				} else {					cell.setBackground(Color.gray);				}			}		}	}}