명품 JAVA Programming 제 14장 실습문제 (4, 6번)

4번 Code

 

package Part14;

import javax.swing.*; // JFrame
import javax.swing.event.ChangeEvent;
import javax.swing.event.ChangeListener;
import java.awt.*; // Container
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.awt.event.ItemEvent;
import java.awt.event.ItemListener;
import java.awt.event.KeyAdapter;
import java.awt.event.KeyEvent;
import java.awt.event.KeyListener;
import java.awt.event.MouseAdapter;
import java.awt.event.MouseEvent;
import java.awt.event.MouseListener;
import java.awt.event.MouseMotionAdapter;
import java.awt.event.MouseMotionListener;
import java.util.Calendar;
import java.util.Random;
import java.util.Vector;
import java.awt.*;

public class Problem14_4 extends JFrame{
	private JTextField tf = new JTextField(20);
	private Container cp;
	
	private void createToolBar() {
		JToolBar toolBar = new JToolBar("Menu");
		toolBar.setBackground(Color.LIGHT_GRAY);
		
		toolBar.add(new JLabel("학번 :"));
		toolBar.add(tf);
		
		tf.addKeyListener(new KeyAdapter() {
			public void keyTyped(KeyEvent e) {
				char key = e.getKeyChar();
				if(key<'0' || key>'9') {
					JOptionPane.showMessageDialog(null, key + "는 숫자 키가 아닙니다.\n숫자를 입력하세요.",
							"경고", JOptionPane.ERROR_MESSAGE);
					e.consume();
				}
			}
		});
		
		cp.add(toolBar,BorderLayout.SOUTH);
	}
	
	Problem14_4(){
		setTitle("14장 연습하기");
		setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
		cp = getContentPane();
		createToolBar();
		
		setSize(400, 300); 
		setVisible(true);
		
		setFocusable(true);
		requestFocus();
	}
	
	public static void main(String[] args) {
		// TODO Auto-generated method stub
		new Problem14_4();
	}

}

 

 

6번 코드

 

package Part14;

import javax.swing.*; // JFrame
import javax.swing.event.ChangeEvent;
import javax.swing.event.ChangeListener;
import java.awt.*; // Container
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.awt.event.ItemEvent;
import java.awt.event.ItemListener;
import java.awt.event.KeyAdapter;
import java.awt.event.KeyEvent;
import java.awt.event.KeyListener;
import java.awt.event.MouseAdapter;
import java.awt.event.MouseEvent;
import java.awt.event.MouseListener;
import java.awt.event.MouseMotionAdapter;
import java.awt.event.MouseMotionListener;
import java.util.Calendar;
import java.util.Random;
import java.util.Vector;
import java.awt.*;

class MyDialog1 extends JDialog{
	private JLabel jl = new JLabel("두 수를 더합니다.");
	private JTextField tf1 = new JTextField(15);
	private JTextField tf2 = new JTextField(15);
	private JButton jb = new JButton("Add");
	
	MyDialog1(JFrame frame, String title){
		super(frame, title, true);
		setLayout(new FlowLayout());
		
		add(jl);
		add(tf1);
		add(tf2);

		jb.addActionListener(new ActionListener() {
			public void actionPerformed(ActionEvent e) {
				setVisible(false);
			}
		});
		
		add(jb);
		
		setSize(200,300);
	}
	
	int getValue1() {
		int x = Integer.parseInt(tf1.getText());
		return x;
	}
	
	int getValue2() {
		int x = Integer.parseInt(tf2.getText());
		return x;
	}
	
}

public class Problem14_6 extends JFrame{
	private JButton jbtn = new JButton("Calculate");
	private JLabel jl = new JLabel("계산 결과 출력");
	private MyDialog1 dialog;
	
	Problem14_6(){
		setTitle("14장 연습하기");
		setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
		Container c = getContentPane();
		c.setLayout(new FlowLayout(FlowLayout.CENTER));
		
		dialog = new MyDialog1(this, "14장 연습한다.");
		
		jbtn.addActionListener(new ActionListener() {
			public void actionPerformed(ActionEvent e) {
				dialog.setVisible(true);
				int x = dialog.getValue1();
				int y = dialog.getValue2();
				jl.setText(Integer.toString(x+y));
			}
		});
		
		c.add(jbtn);
		
		jl.setOpaque(true);
		jl.setBackground(Color.GREEN);
		c.add(jl);
		
		setSize(300, 200); 
		setVisible(true);
	}
	
	public static void main(String[] args) {
		// TODO Auto-generated method stub
		new Problem14_6();
	}

}