fontsetdemo.java

学习参考,java基本语法练习,包括一些常用的技巧

//JCheckBox、JComboBox、JList和JRadioButton组件综合演示
import javax.swing.*;
import javax.swing.event.*;
import java.awt.*;
import java.awt.event.*;

public class FontSetDemo extends JFrame implements ActionListener,ItemListener
{
	JPanel pnlMain;
	JLabel lblSize,lblType,lblTest;
	JRadioButton rbtnRed,rbtnGreen;
	JCheckBox chkBold,chkItalic;
	JButton btnExit;
	ButtonGroup grpColor;
	List lstSize;
	JComboBox cmbType;
	String[] strType={"宋体","隶书","楷体_GB2312","仿宋_GB2312"};
	public FontSetDemo()
	{
		super("字体设置器");
		lblType=new JLabel("请选择字体");
		lblSize=new JLabel("请选择字形");
		lstSize=new List();
		lstSize.addItemListener(this);
		for (int i=10;i<30;i+=2)
			lstSize.add(String.valueOf(i));
		lstSize.select(0);
		cmbType=new JComboBox(strType);
		cmbType.addItemListener(this);
		cmbType.setSelectedIndex(0);
		grpColor=new ButtonGroup();
		rbtnRed=new JRadioButton("红色");
		grpColor.add(rbtnRed);
		rbtnRed.setSelected(true);
		rbtnRed.addItemListener(this);
		rbtnGreen=new JRadioButton("绿色");
		grpColor.add(rbtnGreen);
		rbtnGreen.addItemListener(this);
		chkBold=new JCheckBox("加粗");
		chkBold.addItemListener(this);
		chkItalic=new JCheckBox("倾钭");
		chkItalic.addItemListener(this);
		lblTest=new JLabel("这是字体设置的测试文字");
		lblTest.setBorder(BorderFactory.createBevelBorder(1));
		btnExit=new JButton("退出");
		btnExit.addActionListener(this);
		pnlMain=new JPanel(null);
		lblType.setBounds(5,0,80,30);
		cmbType.setBounds(5,30,80,30);
		lblSize.setBounds(100,0,80,30);
		lstSize.setBounds(100,30,80,60);
		rbtnRed.setBounds(185,5,60,30);
		rbtnGreen.setBounds(245,5,60,30);
		chkBold.setBounds(185,35,60,30);
		chkItalic.setBounds(245,35,60,30);
		lblTest.setBounds(10,100,270,60);
		pnlMain.add(lblType);
		pnlMain.add(cmbType);
		pnlMain.add(lblSize);
		pnlMain.add(lstSize);
		pnlMain.add(rbtnRed);
		pnlMain.add(rbtnGreen);
		pnlMain.add(chkBold);
		pnlMain.add(chkItalic);
		pnlMain.add(lblTest);
		pnlMain.add(btnExit);
		this.setContentPane(pnlMain);
		setSize(300,200);
		setVisible(true);
	}
		public void actionPerformed(ActionEvent evt)
		{
			if (evt.getSource()==btnExit)
				System.exit(0);
		}
		public void itemStateChanged(ItemEvent evt)
		{
			if (evt.getSource()==rbtnRed)	
				lblTest.setForeground(Color.RED);
			if (evt.getSource()==rbtnGreen)
				lblTest.setForeground(Color.GREEN);
			int intBold=(chkBold.isSelected()?Font.BOLD:Font.PLAIN);
			int intItalic=(chkItalic.isSelected()?Font.ITALIC:Font.PLAIN);
			int intSize=Integer.parseInt((String)lstSize.getSelectedItem());
			String strType=(String)cmbType.getSelectedItem();
			lblTest.setFont(new Font(strType,intBold+intItalic,intSize));
		}
	public static void main(String args[])
	{
		new FontSetDemo();
	}
}