显示字体

2.编写一个FontFamily类，该类对象获取当前机器可用的全部字体名称。

编写一个对话框FontDialog，该对话框是模式对话框，采用BorderLayout布局，包含一个JComboBox放在北面显示全部字体的名称，包含一个JLabel放在中间，显示字体的效果，包含两个按钮放在南面，点击YES，在对话框所依赖的窗口中设置字体的效果，点击Cancle取消。

编写一个窗口FrameHaveDialog，该窗口有一个按钮和一个文本区，当单击该按钮时，弹出对话框FontDialog，然后根据用户在对话框下拉列表中选择的为显示文本区中的文本。

最后编写一个程序执行入口进行测试。

import java.awt.GraphicsEnvironment;


public class FontFamily {
	String[] fontName;
	GraphicsEnvironment ge;

	public FontFamily() {
		super();
		// TODO Auto-generated constructor stub
		ge = GraphicsEnvironment.getLocalGraphicsEnvironment();
		fontName = ge.getAvailableFontFamilyNames();
	}

	public String[] getFontName() {
		return fontName;
	}
}

import java.awt.BorderLayout;
import java.awt.Font;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.awt.event.ItemEvent;
import java.awt.event.ItemListener;

import javax.swing.JButton;
import javax.swing.JComboBox;
import javax.swing.JFrame;
import javax.swing.JLabel;
import javax.swing.JPanel;


public class FontDialog extends JFrame implements ItemListener, ActionListener{
	JComboBox jcom;
	String[] fontName;
	String name;
	FontFamily fam;
	JLabel label;
	JButton yes,central;
	JPanel panel;

	public FontDialog() {
		super();
		// TODO Auto-generated constructor stub
		fam = new FontFamily();
		jcom = new JComboBox();
		fontName = fam.getFontName();
		for (int i = 0; i < fontName.length; i++) {
			jcom.addItem(fontName[i]);
		}

		label = new JLabel();
		Font f = new Font(null);
		label.setFont(f);
		label.setText("hello word");
		yes = new JButton("yes");
		central = new JButton("central");
		panel = new JPanel();
		panel.add(yes);
		panel.add(central);
		add(jcom, BorderLayout.NORTH);
		add(label, BorderLayout.CENTER);
		add(panel, BorderLayout.SOUTH);
		jcom.addItemListener(this);
		yes.addActionListener(this);
		central.addActionListener(this);
		setBounds(100, 100, 400, 300);
		setVisible(true);
		validate();

	}

	public String getName() {
		return name;
	}

	@Override
	public void itemStateChanged(ItemEvent e) {
		// TODO Auto-generated method stub
		if(e.getSource()==jcom)
		{
			name=(String) jcom.getSelectedItem();
		}
		
	}

	@Override
	public void actionPerformed(ActionEvent e) {
		// TODO Auto-generated method stub
		if(e.getSource()==yes)
		{
			Font f=new Font(name,Font.BOLD,32);
			label.setFont(f);
			label.setText("hello word");
		}
		if(e.getSource()==central)
		{
			Font f=new Font(null);
			label.setFont(f);
			label.setText("hello word");
		}
		
	}

	

}

import java.awt.BorderLayout;
import java.awt.Font;
import java.awt.HeadlessException;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;

import javax.swing.JButton;
import javax.swing.JFrame;
import javax.swing.JTextArea;


public class FrameHaveDialog extends JFrame implements ActionListener{
	JButton bt01;
	JTextArea area;
	FontDialog dia;

		
	
	public FrameHaveDialog() throws HeadlessException {
		super();
		// TODO Auto-generated constructor stub
		 dia=new FontDialog();
		bt01=new JButton("显示字体");
		area=new JTextArea();
		bt01.addActionListener(this);
		add(bt01,BorderLayout.NORTH);
		add(area,BorderLayout.CENTER);
		setBounds(500,100, 400, 300);
		setVisible(true);
		validate();
	}
	@Override
	public void actionPerformed(ActionEvent e) {
		// TODO Auto-generated method stub
		if(e.getSource()==bt01)
		{
			
			String name=dia.getName();
			Font font=new Font(name,Font.BOLD,32);
			area.setFont(font);
		}
		
	}
	

}

public class TextMain {

	/**
	 * @param args
	 */
	public static void main(String[] args) {
		// TODO Auto-generated method stub
//		FontDialog f=new FontDialog();
		FrameHaveDialog ha=new FrameHaveDialog();

	}

}