명품 자바 프로그래밍 14장 실습 문제

✏️ 14장 실습문제 - 1번

package ex;
import javax.swing.*;

public class SolveProblem extends JFrame {

    public SolveProblem(){
        setTitle("메뉴 만들기");
        setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        createMenu();
        setSize(400,200);
        setVisible(true);
    }

    private void createMenu(){
        JMenuBar menuBar = new JMenuBar();

        JMenu file = new JMenu("파일");
        JMenu edit = new JMenu("편집");
        JMenu menu = new JMenu("보기");
        JMenu input = new JMenu("입력");

        JMenuItem blow = new JMenuItem("화면확대");
        JMenuItem outline = new JMenuItem("쪽윤곽");

        menu.add(blow);
        menu.add(outline);

        menuBar.add(file);
        menuBar.add(edit);
        menuBar.add(menu);
        menuBar.add(input);

        setJMenuBar(menuBar);
    }
    
    public static void main(String[] args) {
        new SolveProblem();
    }
}

 

✏️ 14장 실습문제 - 2번

package ex;

import javax.swing.*;
import javax.swing.filechooser.FileNameExtensionFilter;
import java.awt.*;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;

class MyPanel extends JPanel{
    private ImageIcon imageIcon;
    private Image image;

    public MyPanel(String string) {
        imageIcon = new ImageIcon(string);
        image= imageIcon.getImage();
    }

    @Override
    public void paintComponent(Graphics g) {
        super.paintComponent(g);
        g.drawImage(image,0,0,this.getWidth(),this.getHeight(),this);
    }
}


public class SolveProblem extends JFrame {

    public SolveProblem(){
        setTitle("메뉴로 배경 이미지 로딩하기");
        setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        createMenu();
        setSize(400,200);
        setVisible(true);
    }

    private void createMenu(){
        JMenuBar menuBar = new JMenuBar();
        JMenu menu = new JMenu("파일");
        JMenuItem menuItem = new JMenuItem("열기");

        menuItem.addActionListener(new ActionListener() {
            @Override
            public void actionPerformed(ActionEvent e) {
                JFileChooser fileChooser = new JFileChooser();
                FileNameExtensionFilter filter = new FileNameExtensionFilter("JPG & GIF Images","jpg","gif");
                fileChooser.setFileFilter(filter);
                int ret = fileChooser.showOpenDialog(null);
                if(ret!=JFileChooser.APPROVE_OPTION){
                    JOptionPane.showMessageDialog(null,"파일을 선택하지 않았습니다","경고",JOptionPane.WARNING_MESSAGE);
                    return;
                }

                String filePath = fileChooser.getSelectedFile().getPath();
                MyPanel panel = new MyPanel(filePath);
                setContentPane(panel);
            }
        });

        menu.add(menuItem);
        menuBar.add(menu);
        setJMenuBar(menuBar);
    }

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

 

✏️ 14장 실습문제 - 3번

package ex;
import javax.swing.*;
import javax.swing.event.*;
import java.awt.*;
import java.awt.event.*;
public class SolveProblem extends JFrame {

    private Container container;
    public SolveProblem(){
        setTitle("메뉴로 배경 이미지 로딩하기");
        setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        container = getContentPane();
        createMenu();
        setSize(400,200);
        setVisible(true);
    }

    private void createMenu(){
        JToolBar toolBar = new JToolBar("툴바");
        JButton button = new JButton("종료");
        toolBar.setBackground(Color.LIGHT_GRAY);

        button.addActionListener(new ActionListener() {
            @Override
            public void actionPerformed(ActionEvent e) {
                int result = JOptionPane.showConfirmDialog(null,"정말 종료하시겠습니까?","Confirm",JOptionPane.YES_NO_OPTION);
                if(result==JOptionPane.YES_OPTION)
                    setVisible(false);
                else
                    setVisible(true);
            }
        });

        toolBar.add(button);
        container.add(toolBar,BorderLayout.NORTH);

    }

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

 

✏️ 14장 실습문제 - 4번

package ex;
import javax.swing.*;
import javax.swing.event.*;
import java.awt.*;
import java.awt.event.*;
public class SolveProblem extends JFrame {

    private Container container;
    public SolveProblem(){
        setTitle("메뉴로 배경 이미지 로딩하기");
        setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        container = getContentPane();
        createMenu();
        setSize(400,200);
        setVisible(true);
    }

    private void createMenu(){
        JToolBar toolBar = new JToolBar("툴바");
        JLabel label = new JLabel("학번: ");
        JTextField textField = new JTextField();

        textField.addKeyListener(new KeyAdapter() {
            @Override
            public void keyTyped(KeyEvent e) {
                char code = e.getKeyChar();
                if(code>=48&&code<=57)
                    return;
                else{
                    JOptionPane.showMessageDialog(null,e.getKeyChar()+"는 숫자가 아닙니다.\n숫자를 입력하세요.","경고",JOptionPane.WARNING_MESSAGE);
                    e.consume();
                }
            }
        });

        toolBar.add(label);
        toolBar.add(textField);
        container.add(toolBar,BorderLayout.SOUTH);

    }

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

 

✏️ 14장 실습문제 - 5번

package ex;
import javax.sound.sampled.AudioInputStream;
import javax.sound.sampled.AudioSystem;
import javax.sound.sampled.Clip;
import javax.swing.*;
import javax.swing.event.*;
import java.awt.*;
import java.awt.event.*;
import java.io.*;

public class SolveProblem extends JFrame {

    Clip clip = null;
    File audioFile = null;
    private JLabel play,stop;
    public SolveProblem(){
        setTitle("메뉴로 배경 이미지 로딩하기");
        setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        Container c = getContentPane();
        c.setLayout(new FlowLayout());

        play = new JLabel("audio\\hiphop.wav 연주 계속");
        stop = new JLabel("audio\\hiphop.wav 연주 일시 중단");
        c.add(play);
        c.add(stop);
        play.setVisible(true);
        stop.setVisible(false);

        try{
            clip = AudioSystem.getClip();
            audioFile = new File("audio/애국가1절.wav");
            AudioInputStream audioInputStream = AudioSystem.getAudioInputStream(audioFile);
            clip.open(audioInputStream);
            clip.start();
        }
        catch (Exception e){
            e.printStackTrace();;
        }

        c.addMouseListener(new MouseAdapter() {
            @Override
            public void mouseEntered(MouseEvent e) {
                if(!clip.isActive())
                    clip.start();
                play.setVisible(true);
                stop.setVisible(false);
            }

            @Override
            public void mouseExited(MouseEvent e) {
                clip.stop();
                stop.setVisible(true);
                play.setVisible(false);
            }
        });

        setSize(400,200);
        setVisible(true);
    }

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

 

✏️ 14장 실습문제 - 6번

package ex;
import javax.sound.sampled.*;
import javax.swing.*;
import javax.swing.event.*;
import java.awt.*;
import java.awt.event.*;
import java.io.*;

public class SolveProblem extends JFrame {
    private JButton calculate;
    private JLabel label;
    private MyModalDialog dialog;
    private int res;
    public SolveProblem() {
        calculate = new JButton("calcuate");
        label = new JLabel("계산 결과 출력");
        label.setBackground(Color.GREEN);

        setTitle("다이얼로그 만들기");
        setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        Container c = getContentPane();
        c.setLayout(new FlowLayout());

        c.add(calculate);
        c.add(label);

        calculate.addActionListener(new ActionListener() {
            @Override
            public void actionPerformed(ActionEvent e) {
                dialog = new MyModalDialog();
                dialog.setVisible(true);
            }
        });

        setVisible(true);
        setSize(400, 200);
    }

    class MyModalDialog extends JDialog {
        private JTextField num1, num2;
        private JButton Add;
        public MyModalDialog() {
            num1 = new JTextField(10);
            num2 = new JTextField(10);
            Add = new JButton("add");

            setLayout(new FlowLayout());
            add(new JLabel("두 수를 더합니다"));
            add(num1);
            add(num2);
            add(Add);

            setVisible(true);
            setSize(400,200);
            setTitle("Calculation Dialog");

            Add.addActionListener(new ActionListener() {
                @Override
                public void actionPerformed(ActionEvent e) {
                    setVisible(false);
                    String text1 = num1.getText();
                    String text2 = num2.getText();
                    int res = Integer.parseInt(text1)+Integer.parseInt(text2);
                    label.setText(Integer.toString(res));
                }
            });
        }
    }

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

 

✏️ 14장 실습문제 - 7번

package ex;
import javax.sound.sampled.*;
import javax.swing.*;
import javax.swing.event.*;
import javax.swing.filechooser.FileNameExtensionFilter;
import java.awt.*;
import java.awt.event.*;
import java.io.*;

public class SolveProblem extends JFrame {

    private JLabel label=new JLabel();
    private Clip clip;
    private File AudioFile;
    private String filePath;
    public SolveProblem(){
        setTitle("오디오 파일을 찾아 연주/종료 제어");
        setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        label.setText("오디오 파일을 선택하세요");
        setLayout(new FlowLayout());
        getContentPane().add(label);
        createMenu();
        setVisible(true);
        setSize(400,200);
    }
    public void createMenu(){
        JMenuBar menuBar = new JMenuBar();
        JMenu menu = new JMenu("오디오");
        JMenuItem play = new JMenuItem("연주");
        JMenuItem stop = new JMenuItem("종료");

        menu.add(play);
        menu.add(stop);
        menuBar.add(menu);
        setJMenuBar(menuBar);

        play.addActionListener(new ActionListener() {
            @Override
            public void actionPerformed(ActionEvent e) {
                JFileChooser fileChooser = new JFileChooser();
                FileNameExtensionFilter filter = new FileNameExtensionFilter("wav파일","wav");
                fileChooser.setFileFilter(filter);
                int ret = fileChooser.showOpenDialog(null);
                if(ret!=JFileChooser.APPROVE_OPTION){
                    JOptionPane.showMessageDialog(null,"파일을 선택하지 않았습니다","warnning",JOptionPane.WARNING_MESSAGE);
                    return;
                }
                filePath = fileChooser.getSelectedFile().getPath();
                playMusic(filePath);
                label.setText(filePath+"를 연주하고 있습니다.");
            }
        });

        stop.addActionListener(new ActionListener() {
            @Override
            public void actionPerformed(ActionEvent e) {
                clip.stop();
                label.setText("오디오를 선택하세요.");
            }
        });
    }

    public void playMusic(String string){
        try{
            clip = AudioSystem.getClip();
            AudioFile = new File(string);
            AudioInputStream inputStream = AudioSystem.getAudioInputStream(AudioFile);
            clip.open(inputStream);
            clip.start();
        }
        catch(Exception e){
            e.printStackTrace();
        }
    }

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

 

✏️ 14장 실습문제 - 8번

package ex;
import javax.sound.sampled.*;
import javax.swing.*;
import javax.swing.event.*;
import javax.swing.filechooser.FileNameExtensionFilter;
import java.awt.*;
import java.awt.event.*;
import java.io.*;
import java.util.HashMap;
import java.util.Vector;

public class SolveProblem extends JFrame {

    JCheckBox [] checkBoxes = new JCheckBox[4];
    private JLabel label = new JLabel("체크된 곡만 순서대로 한 번 연주합니다.");
    private JLabel[] labels = new JLabel[4];
    private String[] s= {"audio\\wolf.wav","audio\\dhol_drums.wav","audio\\sirenpolice.wav","audio\\hiphop.wav"};
    private JButton playMusic, stopMusic;
    File [] files = new File[4];
    Clip clip = null;
    Vector<String>v;
    public SolveProblem(){
        setTitle("오디오 연주");
        setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        Container c =getContentPane();
        c.setLayout(new GridLayout(6,1,5,5));

        label.setBackground(Color.GRAY);
        c.add(label);

        for(int i=0;i<s.length;i++){
            files[i]=new File(s[i]);
            checkBoxes[i] = new JCheckBox(files[i].getName());
            c.add(checkBoxes[i]);
            checkBoxes[i].setHorizontalAlignment(SwingConstants.CENTER);
        }

        JPanel panel = new JPanel();
        playMusic = new JButton("연주시작");
        stopMusic = new JButton("연주 끝");
        panel.add(playMusic);
        panel.add(stopMusic);
        c.add(panel);

        playMusic.addActionListener(new ActionListener() {
            @Override
            public void actionPerformed(ActionEvent e) {
                setAudio();
            }
        });

        stopMusic.addActionListener(new ActionListener() {
            @Override
            public void actionPerformed(ActionEvent e) {
               clip.close();
            }
        });

        setVisible(true);
        setSize(400,200);
    }

    public void setAudio(){
        v = new Vector<>();
        for(int i=0;i<checkBoxes.length;i++){
            if(checkBoxes[i].isSelected())
                v.add(files[i].getPath());
        }

        if(v.size()<=0)
            return;

        playFile(v.get(0));
        v.remove(0);

        clip.addLineListener(new LineListener() {
            @Override
            public void update(LineEvent event) {
                if(event.getType()==LineEvent.Type.STOP && v.size()!=0){
                    playFile(v.get(0));
                    v.remove(0);
                }
            }
        });
    }
    public void playFile(String path){
        File file = new File(path);
        try{
            clip = AudioSystem.getClip();
            AudioInputStream inputStream = AudioSystem.getAudioInputStream(file);
            clip.open(inputStream);
            clip.start();
        }
        catch(Exception e){
            e.printStackTrace();
        }
    }


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