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 stubge = 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 stubfam = 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;}@Overridepublic void itemStateChanged(ItemEvent e) {// TODO Auto-generated method stubif(e.getSource()==jcom){name=(String) jcom.getSelectedItem();}}@Overridepublic void actionPerformed(ActionEvent e) {// TODO Auto-generated method stubif(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();}@Overridepublic void actionPerformed(ActionEvent e) {// TODO Auto-generated method stubif(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();}}