5월 10일 학습 내용 정리

 

 

 

GUI 구현 테스트 / 파일 복사

 

1. 파일 복사

 - 텍스트 복사

public class TextCopy {
	public static void main(String[] args) {
		File src = new File("C:/Windows/system.ini"); // 원본파일에 접근할 객체
		File copy = new File("C:/temp/system.txt"); // 복사본
		FileReader reader = null;
		FileWriter writer = null;
		try {
			reader = new FileReader(src);
			writer = new FileWriter(copy);
			while (true) {
				int data = reader.read();
				if (data == -1) {
					break;
				}
				writer.write((char)data);
			}
			System.out.println("파일 복사 완료");
			reader.close(); // reader와 writer를 닫지 않으면 파일은 생성되나 내용이 없음
			writer.close();
		} catch (Exception e) {
			e.printStackTrace();
		}
	}
}

 

 - 바이너리 복사

public class BinaryCopy {
	public static void main(String[] args) {
		File src = new File("G:/workspace/java/ch10/images/image2.jpg");
		File copy = new File("G:/workspace/java/ch10/images/image2_copy.jpg");
		FileInputStream input = null;
		FileOutputStream output = null;
		try {
			input = new FileInputStream(src);
			output = new FileOutputStream(copy);
			while (true) {
				int data = input.read();
				if (data == -1) break;
				output.write(data);
			}
			input.close();
			output.close();
			System.out.println("파일 복사 완료");
		} catch (Exception e) {
			e.printStackTrace();
		}
	}
}

 

2. GUI 구현 테스트 - 1부터 100까지의 숫자를 5회 안에 맞추는 게임을 제시된 조건에 맞게 구현

public class NumGameFrame extends JFrame implements ActionListener {

	Container c = getContentPane();

	JPanel pnlNorth = new JPanel();
	JPanel pnlSouth = new JPanel();
	TimeTickingPanel pnlTime = new TimeTickingPanel();
	JTextArea taMessage = new JTextArea();
	JTextField tfInput = new JTextField(6);
	JTextField tfScore = new JTextField(6);
	JTextField tfChance = new JTextField(5);
	JButton btnInput = new JButton("입력");
	JButton btnNewGame = new JButton("새게임");

	String heart = "";
	static long startTime;
	static long endTime;
	long previousScore;
	long currentScore;
	ArrayList<Byte> records = new ArrayList<>();

	NumGameManager manager = NumGameManager.getInstance();

	public NumGameFrame() {
		setDefaultCloseOperation(EXIT_ON_CLOSE);
		setTitle("NumGame");
		setSize(450, 250);
		setUI();

		setVisible(true);

		MyThread th = new MyThread();
		th.start();
	}

	private void setUI() {
		MyMouseListener listener = new MyMouseListener();

		tfInput.setEnabled(false);
		btnInput.setEnabled(false);
		tfScore.setEditable(false);
		tfChance.setEditable(false);

		tfInput.addActionListener(this);
		btnInput.addMouseListener(listener);
		btnNewGame.addMouseListener(listener);

		pnlNorth.setBackground(Color.MAGENTA);

		pnlNorth.add(new JLabel("입력:"));
		pnlNorth.add(tfInput);
		pnlNorth.add(btnInput);
		pnlNorth.add(new JLabel("기록:"));
		pnlNorth.add(tfScore);
		pnlNorth.add(btnNewGame);

		taMessage.setFont(new Font("맑은 고딕", Font.BOLD, 20));
		taMessage.setEditable(false);

		pnlTime.setOpaque(true);

		pnlSouth.setBackground(Color.CYAN);
		pnlSouth.add(new JLabel("남은횟수:"));
		pnlSouth.add(tfChance);
		pnlSouth.add(pnlTime);

		c.add(pnlNorth, BorderLayout.NORTH);
		c.add(new JScrollPane(taMessage));
		c.add(pnlSouth, BorderLayout.SOUTH);
	}

	private synchronized void init() {
		manager.initChance();
		taMessage.setText("1부터 100 사이의 숫자를 맞춰보세요. \n");
		manager.setAnswer();
		showHeart();
		tfInput.setEnabled(true);
		btnInput.setEnabled(true);
		tfInput.setText("");
		startTime = System.currentTimeMillis();
		notify();
	}

	private class MyMouseListener extends MouseAdapter {
		public void mouseClicked(MouseEvent e) {
			Object obj = e.getSource();
			if (obj == btnInput || obj == tfInput) {
				setGame();
			} else if (obj == btnNewGame) {
				init();
			}
		}
	}

	public void setGame() {
		String userText = tfInput.getText();
		try {
			int userVal = Integer.parseInt(userText);
			int result = manager.judge(userVal);
			switch (result) {
			case 0:
				taMessage.append("입력한 숫자보다 작습니다. \n");
				checkChance();
				break;
			case 1:
				taMessage.append("입력한 숫자보다 큽니다. \n");
				checkChance();
				break;
			case 2:
				endTime = System.currentTimeMillis();
				long gameTime = endTime - startTime;
				taMessage.append("정답입니다.\n");
				taMessage.append("걸린 시간: " + gameTime);
				tfInput.setEnabled(false);
				btnInput.setEnabled(false);
				showMessage("정답입니다.");
				checkScore();
			}
		} catch (Exception e) {
			taMessage.append("올바른 값이 아닙니다. 숫자를 다시 입력해주세요. \n");
		}
		showHeart();
	}

	public static long[] getGameTime() {
		long[] gameTime = {startTime, endTime};
		return gameTime;
	}

	public void checkScore() {
		String score = manager.setScore();
		switch (score) {
		case "new" :
			tfScore.setText(String.valueOf(manager.getScore()));
			showMessage("새로운 기록 달성");

			records.add((byte)(endTime - startTime));
			String path = System.getProperty("user.dir");
			System.out.println(path);
			FileOutputStream fos = null; 
			try {
				fos = new FileOutputStream(path + "/record.dat");
				for (int i = 0; i < records.size(); i++) {
					fos.write(records.get(i));
				}
				fos.close();
			} catch (Exception e) {
				e.printStackTrace();
			}
			System.out.println("저장 완료");
			break;
		case "no update" :
			break;
		}
	}

	private void checkChance() {
		int chance = manager.getChance();
		if (chance == 0) {
			tfInput.setEnabled(false);
			btnInput.setEnabled(false);
			showMessage("기회를 모두 사용하였습니다.");
			return;
		}
	}

	private void showMessage(String text) {
		JOptionPane.showMessageDialog(c, text,
				"Message", JOptionPane.INFORMATION_MESSAGE);
	}

	private void showHeart() {
		heart = "";
		int chance = manager.getChance();
		for (int i = 0; i < chance; i++) {
			heart += "♥";
		}
		System.out.println("남은횟수:" + chance);
		tfChance.setText(heart);
	}
    
	public void actionPerformed(ActionEvent e) {
		setGame();
		repaint();
	}

	public class TimeTickingPanel extends JPanel {

		public TimeTickingPanel() {
			setBackground(Color.YELLOW);
			setSize(100, 30);
		}
        
		protected void paintComponent(Graphics g) {
			super.paintComponent(g);
			g.setColor(Color.GREEN);
			g.fillRect(0, 0, 100, 20);
		}
	}

	class MyThread extends Thread {
		public synchronized void run() {
			while (true) {
				try {
					checkChance();
					if (manager.getChance() == 0) {
						wait();
					}
					Thread.sleep(5000);
					manager.reduceChance();
					showHeart();
				} catch (InterruptedException e) {
					e.printStackTrace();
				}
			}
		}
	}

	public static int notifyTime() {
		return 0;
	}

	public static void main(String[] args) {
		new NumGameFrame();
	}
}

 

public class NumGameManager {
	private static int chance = 5;
	private int answer = 0;
	private long score = 30000;
	public final static int LOW = 0;
	public final static int HIGH = 1;
	public final static int CORRECT = 2;
	long[] gameTime = NumGameFrame.getGameTime();

	private static NumGameManager instance = new NumGameManager();

	private NumGameManager() {}

	public static NumGameManager getInstance() {
		return instance;
	}

	public void setAnswer() {
		answer = (int)(Math.random() * 100) + 1;
		System.out.println(answer);
	}

	public int judge(int userVal) {
		--chance;
		if (userVal > answer) {
			return LOW;
		} else if (userVal < answer) {
			return HIGH;
		} 
		return CORRECT;
	}

	public int getChance() {
		return chance;
	}

	public int getAnswer() {
		return answer;
	}

	public long getScore() {
		return score;
	}

	public String setScore() {
		long currentScore = gameTime[1] - gameTime[0];
		if (currentScore < score) {
			score = currentScore;
			return "new";
		} else {
			return "no update";
		}
	}

	public void reduceChance() {
		if (chance == 0) return;
		chance--;
	}

	public void initChance() {
		chance = 5;
	}
}

예상대로 작동하지 않는 기능이 있어 복습이 필요함(JFrame의 Layout, paintComponent, Thread 등)