Java程序设计教程 冶金工业出版社第5章(3)

} }

//例程5-12：ToolBarDemo.java import java.awt.*; import javax.swing.*; import java.awt.event.*; public class ToolBarDemo {

public static void main(String[] args) {

JFrame frame = new JFrame();

frame.setTitle(\JToolBar toolbar = new JToolBar(); //将工具栏添加在窗口顶部

frame.getContentPane().add(toolbar, BorderLayout.NORTH); JButton button = new JButton(\toolbar.add(button); toolbar.addSeparator();

JComboBox combo = new JComboBox(); combo.addItem(\combo.addItem(\toolbar.add(combo);

Dimension dim = new Dimension(200,100); JTextArea text = new JTextArea(); text.setPreferredSize(dim); frame.getContentPane().add(text);

frame.addWindowListener(new WindowAdapter() { });

frame.pack(); frame.setVisible(true);

public void windowClosing (WindowEvent e) { }

System.exit(0);

} }

//例程5-13：DialogDemo.java import java.awt.*; import java.awt.event.*; public class DialogDemo {

public static void main(String[] args) {

DialogFrame df = new DialogFrame(\df.setSize(200,150);

df.addWindowListener(new WindowAdapter() {

public void windowClosing(WindowEvent e) {System.exit(0);}

}

}

});

df.show();

class DialogFrame extends Frame implements ActionListener {

Label message; Button get;

OkCancelDialog dialog; DialogFrame(String title) { }

public void actionPerformed(ActionEvent event) { }

if (event.getSource() == get) { }

dialog.setVisible(true); message.setText(dialog.data); super(title);

message = new Label(\get = new Button(\get.addActionListener(this); setLayout(new GridLayout(2,1)); add(message); add(get);

dialog = new OkCancelDialog(this, \

}

class OkCancelDialog extends Dialog implements ActionListener {

Button ok, cancel; TextField text; public String data;

OkCancelDialog(Frame hostFrame, String title, boolean dModal) {

super(hostFrame, title, dModal); setSize(250, 100);

setLayout(new FlowLayout()); text = new TextField(30); add(text);

ok = new Button(\

ok.addActionListener((ActionListener)this); add(ok);

cancel = new Button(\

cancel.addActionListener((ActionListener)this); add(cancel); data = new String(\

}

public void actionPerformed(ActionEvent event) {

}

if (event.getSource() == ok) { }

setVisible(false);

//将窗口设置为不可见

data = text.getText(); data = \} else {

}

//例程5-14：OptionDialogDemo.java import java.awt.*; import javax.swing.*;

public class OptionDialogDemo {

public static void main(String[] args) {

JFrame frame = new JFrame();

Object[] options = {\是的，很喜欢\喜欢，但更喜欢别的\我会试着喜欢\不，

很不喜欢\

//显示一个OptionDialog，并获得方法返回值

int n = JOptionPane.showOptionDialog(frame, \你喜欢使用JAVA吗？\\调查\

JOptionPane.YES_NO_OPTION,

JOptionPane.QUESTION_MESSAGE, null, options, options[0]);

if (n >= 0 && n < options.length)

JOptionPane.showMessageDialog(frame, \你的选择是：\选择提

示\

else

JOptionPane.showMessageDialog(frame, \你没有作选择\选择提示\

JOptionPane.PLAIN_MESSAGE);

System.exit(1);

}

}

//例程5-15：AwtTotalDemo.java import java.awt.*; import java.awt.event.*; public class AwtTotalDemo {

public static void main(String[] args) {

Frame f = new Frame(\f.setLayout(new GridLayout(7, 1));

Panel p1 = new Panel();

p1.add(new Label(\请输入您的姓名：\p1.add(new TextField(30)); f.add(p1);

Panel p2 = new Panel(); p2.add(new Label(\性别：\

CheckboxGroup cbg = new CheckboxGroup(); //建立一个CheckboxGroup对象 p2.add(new Checkbox(\男\

p2.add(new Checkbox(\女\ f.add(p2);

Panel p3 = new Panel();

p3.add(new Label(\您的爱好：\ p3.add(new Checkbox(\体育\ p3.add(new Checkbox(\音乐\ p3.add(new Checkbox(\电脑\

p3.add(new Checkbox(\文学\f.add(p3);

Panel p4 = new Panel();

p4.add(new Label(\您常用的编程语言有：\ List list = new List(3, true); list.add(\ list.add(\ list.add(\ list.add(\ list.add(\ list.add(\汇编\

p4.add(list);

f.add(p4);

Panel p5 = new Panel(); p5.add(new Label(\您的学历\ Choice c = new Choice();

c.addItem(\中专\ c.addItem(\高中\ c.addItem(\大专\ c.addItem(\本科\ c.addItem(\研究生\ p5.add(c); f.add(p5);

Panel p6 = new Panel();

p6.add(new Label(\请您留言：\ p6.add(new TextArea(\畅所欲言！\ f.add(p6);

Panel p7 = new Panel(); p7.add(new Button(\提交\ p7.add(new Button(\取消\

f.add(p7); }); f.pack(); f.setVisible(true);

f.addWindowListener(new WindowAdapter() {

public void windowClosing(WindowEvent e) { }

System.exit(0);

}

}

//例程5-16：SwingDemo.java import java.awt.*; import java.awt.event.*; import javax.swing.*;

class SwingDemo extends JFrame implements ActionListener { private Container content;

JMenuBar bar = new JMenuBar();

//新建一个菜单栏 //新建“File”菜单

JMenu fileMenu = new JMenu(\

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