명품 JAVA Programming 제 10장 실습문제 5번

컴포넌트에 폰트를 설정하는 방법 익히기 (폰트 크기 변경)

import javax.swing.*; // JFrame
import java.awt.*; // Container
import java.awt.event.KeyAdapter;
import java.awt.event.KeyEvent;
import java.awt.event.MouseEvent;
import java.awt.event.MouseListener;
import java.awt.event.MouseMotionListener;
import java.awt.*;

public class MyFrame extends JFrame {
	
	private JLabel la;
	
	public MyFrame() {
		setTitle("Open Challenge 10");
		setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
		Container c = getContentPane();
		
		c.setLayout(new FlowLayout(FlowLayout.CENTER,10,10));
		
		la = new JLabel("Love Java");
		la.setFont(new Font("Arial",Font.PLAIN,10));
		c.add(la);
		
		c.addKeyListener(new KeyAdapter() {
			public void keyPressed(KeyEvent e) {
				char keyChar=e.getKeyChar();
				if(keyChar=='+') {
					Font f=la.getFont();
					int size = f.getSize();
					la.setFont(new Font("Arial",Font.PLAIN,size+5));
				}
				else if(keyChar=='-') {
					Font f=la.getFont();
					int size = f.getSize();
					la.setFont(new Font("Arial",Font.PLAIN,size-5));
				}
			}
		});
		
		setSize(300, 150); // 프레임 크기 300x300
		setVisible(true); // 프레임 출력
		
		c.setFocusable(true);
		c.requestFocus();
	}
	
	public static void main(String[] args) {
		// TODO Auto-generated method stub
		new MyFrame();
	}

}