?? 第二十五章例子.txt
字號:
25-例子1
import javax.swing.*;import java.awt.*;import java.awt.event.*;
public class Example25_1
{ public static void main(String args[])
{JButton button=new JButton("輕組件按鈕");
JTextArea text=new JTextArea("輕組件",20,20);
JFrame jframe=new JFrame("根窗體");
jframe.setSize(200,300);jframe.setBackground(Color.blue);
jframe.setVisible(true);jframe.pack();
jframe.addWindowListener(new WindowAdapter()
{public void windowClosing(WindowEvent e)
{System.exit(0);} });
Container contentpane=jframe.getContentPane();//獲得內(nèi)容面板。
contentpane.add(button,BorderLayout.SOUTH); //向內(nèi)容面板加入組件。
contentpane.add(text,BorderLayout.CENTER);
jframe.pack();//用緊湊方式顯示窗口，該語句最好應(yīng)在所有添加組件的語句之后。
}
}
25-例子2
import javax.swing.*;import java.awt.*;import java.awt.event.*;
class Mywindow extends JFrame
{ JButton button;JTextArea text;
Mywindow()
{setSize(200,400);setVisible(true);
Container con=getContentPane(); con.setLayout(new FlowLayout());
button=new JButton("ok");text=new JTextArea(10,20);
con.add(button);con.add(text);pack();
addWindowListener(new WindowAdapter()
{public void windowClosing(WindowEvent e)
{System.exit(0);}});
}
}
public class Example25_2
{ public static void main(String args[])
{ Mywindow win=new Mywindow();win.pack();
}
}
25-例子3
import javax.swing.*;import java.awt.BorderLayout;
public class Example25_3 extends JApplet
{ JButton button; JTextArea text;
public void init()
{ button=new JButton("確定");text=new JTextArea();
getContentPane().add(text,BorderLayout.CENTER); //小程序容器得到內(nèi)容面板。
getContentPane().add(button,BorderLayout.WEST);//并向內(nèi)容面板中添加組件。
}
}
25-例子4
import javax.swing.*;import java.awt.*;import java.awt.event.*;
class Dwindow extends JFrame //建立根窗體用的類。
{ JButton button1,button2;
Dwindow(String s)
{ super(s);
Container con=getContentPane();
button1=new JButton("打開"); button2=new JButton("關(guān)閉");
con.add(button1);con.add(button2);pack();
setVisible(true);
addWindowListener(new WindowAdapter()
{public void windowClosing(WindowEvent e)
{System.exit(0);}});
}
}
class Mydialog extends JDialog //建立對話框類。
{ JButton button1,button2;
Mydialog(JFrame F,String s) //構(gòu)造方法。
{ super(F,s);
button1=new JButton("open"); button2=new JButton("close");
setSize(90,90);setVisible(true);setModal(false);
Container con=getContentPane();con.setLayout(new FlowLayout());
con.add(button1);con.add(button2);
addWindowListener(new WindowAdapter()
{public void windowClosing(WindowEvent e)
{System.exit(0);}});
}
}
public class Example25_4 extends JApplet
{ Dwindow window; Mydialog dialog; JButton button;
public void init()
{ window=new Dwindow("帶對話框窗口");//創(chuàng)建窗口。
dialog=new Mydialog(window,"我是對話框"); //創(chuàng)建依賴于窗口window的對話框。
button=new JButton("ok"); getContentPane().add(button);
}
}
25-例子5
import javax.swing.*;import java.awt.*;import java.awt.event.*;
class Myframe extends JFrame implements ActionListener
{ JButton button;JTextArea text;
Myframe()
{ setSize(200,400);setVisible(true);
Container con=getContentPane();
con.setLayout(new FlowLayout());
button=new JButton("ok");text=new JTextArea(10,20);
con.add(button);con.add(text);
button.addActionListener(this);
addWindowListener(new WindowAdapter()
{public void windowClosing(WindowEvent e)
{System.exit(0);}});
}
public void actionPerformed(ActionEvent e)
{ if(e.getSource()==button)
text.setText("i am a boy,and you?");
}
}
public class Example25_5
{ public static void main(String args[])
{ Myframe fr=new Myframe();fr.pack();
}
}
25-例子6
import javax.swing.*; import java.awt.*;
class Mycanvas extends JPanel
{ public void paintComponent(Graphics g)
{ super.paintComponent(g);
g.setColor(Color.red); g.drawString("a Jpanel used as canvas",50,50);
}
}
public class Example25_6 extends JApplet
{ Mycanvas canvas; JPanel panel;JButton button;
public void init()
{ canvas=new Mycanvas();panel=new JPanel();button=new JButton("ok");
panel.add(button); Container con=getContentPane();
con.add(panel,BorderLayout.NORTH); con.add(canvas,BorderLayout.CENTER);
}
}
25-例子7
import javax.swing.*;import java.awt.*;import java.awt.event.*;
class Mywindow extends JFrame
{ JButton button;JTextArea text;JScrollPane scroll;
Mywindow()
{ setSize(200,400);setVisible(true);
Container con=getContentPane();
button=new JButton("ok");text=new JTextArea(10,20);
scroll=new JScrollPane(text);
con.add(button,BorderLayout.SOUTH);con.add(scroll,BorderLayout.CENTER);
addWindowListener(new WindowAdapter()
{public void windowClosing(WindowEvent e)
{System.exit(0);}});
}
}
public class Example25_7
{ public static void main(String args[])
{ Mywindow win=new Mywindow();win.pack();
}
}
25-例子8
import javax.swing.*;import java.awt.*;import java.awt.event.*;
class Mywindow extends JFrame
{ JButton button1,button2;JTextArea text;JSplitPane split_one,split_two;
Mywindow()
{setSize(200,400);setVisible(true); Container con=getContentPane();
button1=new JButton("ok"); button2=new JButton("No");
text=new JTextArea("I love you,java",10,20);
split_one=new JSplitPane(JSplitPane.VERTICAL_SPLIT,button1,button2);
split_two=new JSplitPane(JSplitPane.HORIZONTAL_SPLIT,true,split_one,text);
con.add(split_two,BorderLayout.CENTER);
addWindowListener(new WindowAdapter()
{public void windowClosing(WindowEvent e)
{System.exit(0);}});
}
}
public class Example25_8
{ public static void main(String args[])
{ Mywindow win=new Mywindow();win.pack();
}
}
25-例子9
import javax.swing.*;import java.awt.*;import java.awt.event.*;
class Mywindow extends JFrame
{ JButton button1,button2;
JInternalFrame interframe_1,interframe_2;
Mywindow()
{setSize(200,200);setVisible(true); Container con=getContentPane();
con.setLayout(new GridLayout(1,2));
button1=new JButton("Boy"); button2=new JButton("Girl");
interframe_1=new JInternalFrame("內(nèi)窗體1",true,true,true,true);
interframe_1.setSize(100,100);
interframe_1.getContentPane().add(button1);
JDesktopPane desk1=new JDesktopPane();
desk1.add(interframe_1);
interframe_2=new JInternalFrame("內(nèi)窗體2",true,true,true,true);
interframe_2.setSize(300,150);
interframe_2.getContentPane().add(button2,BorderLayout.CENTER);
interframe_2.getContentPane().add(new JLabel("ookk"),BorderLayout.NORTH);
JDesktopPane desk2=new JDesktopPane();
desk2.add(interframe_2);
con.add(desk1);con.add(desk2);
addWindowListener(new WindowAdapter()
{public void windowClosing(WindowEvent e)
{System.exit(0);}});
}
}
public class Exam25_9
{ public static void main(String args[])
{ Mywindow win=new Mywindow();win.pack();
}
}
25-例子10
import javax.swing.*;import java.awt.*;import java.awt.event.*;
class Mywindow extends JFrame implements ActionListener
{ JButton button1,button2,button3;JTextArea text;Icon icon;
Mywindow()
{setSize(200,200);setVisible(true);
Container con=getContentPane();
text=new JTextArea();
con.setLayout(new GridLayout(1,4));
icon=new ImageIcon("tom.jpg");
button1=new JButton("Boy",icon); button2=new JButton("Girl");
button3=new JButton("friend",new ImageIcon("tom1.jpg"));
button1.setVerticalTextPosition(AbstractButton.TOP);
button1.setMnemonic('b');
con.add(button1);con.add(button2);con.add(button3);con.add(text);
button1.addActionListener(this);button3.addActionListener(this);
addWindowListener(new WindowAdapter()
{public void windowClosing(WindowEvent e)
{System.exit(0);}});
}
public void actionPerformed(ActionEvent e)
{if(e.getSource()==button1)
{ text.setText(button1.getText()+button2.getText());
button2.setIcon(button1.getIcon());
button2.setHorizontalTextPosition(AbstractButton.RIGHT);button3.setEnabled(false);
}
else if(e.getSource()==button3)
{ text.append(button3.getText()); button2.setIcon(button3.getIcon());
}
}
}
public class Example25_10
{ public static void main(String args[])
{ Mywindow win=new Mywindow();win.pack();
}
}
25-例子11
import javax.swing.*;import java.awt.BorderLayout;
import java.awt.event.*;import java.awt.*;
public class Example25_11 extends JApplet implements ActionListener
{ JLabel label_1,label_2;JButton button;JTextArea text;
public void init()
{ button=new JButton("確定");text=new JTextArea();
Icon icon=new ImageIcon("tom.jpg");
label_1=new JLabel("標簽1",icon,JLabel.CENTER); label_2=new JLabel("標簽2");
getContentPane().add(text,BorderLayout.CENTER);
getContentPane().add(button,BorderLayout.WEST);
getContentPane().add(label_1,BorderLayout.NORTH);
getContentPane().add(label_2,BorderLayout.SOUTH);
button.addActionListener(this);
}
public void actionPerformed(ActionEvent e)
{if(e.getSource()==button)
{label_2.setIcon(label_1.getIcon());text.setText(label_1.getText()+label_2.getText());}
button.setIcon(label_1.getIcon());
label_1.setHorizontalTextPosition(JLabel.LEFT);
}
}
25-例子12
import javax.swing.*;import java.awt.BorderLayout;
import java.awt.event.*;import java.awt.*;
public class Example25_12 extends JApplet
implements ActionListener,ItemListener
{ JCheckBox checkbox_1,checkbox_2,checkbox_3;
JButton button;JTextArea text;
public void init()
{ button=new JButton("確定");text=new JTextArea();
Icon icon1=new ImageIcon("hello.jpg");
Icon icon2=new ImageIcon("faint.jpg");
checkbox_1=new JCheckBox("同意",icon1);
checkbox_2=new JCheckBox("反對",icon2);
checkbox_3=new JCheckBox("不知道");
Container con=getContentPane();
con.setLayout(new FlowLayout());
con.add(checkbox_1); con.add(checkbox_2);
con.add(checkbox_3); con.add(button);
button.addActionListener(this);
checkbox_3.addItemListener(this);
}
public void actionPerformed(ActionEvent e)
{if(e.getSource()==button)
{checkbox_2.setIcon(checkbox_1.getIcon());
text.setText(checkbox_1.getText()+checkbox_2.getText());
button.setIcon(checkbox_2.getIcon());
}
}
public void itemStateChanged(ItemEvent e)
{if(e.getItemSelectable()==checkbox_3)
{button.setText(checkbox_3.getText());
}
}
}
25-例子13
import javax.swing.*;
import java.awt.*;import java.awt.event.*;
class Mywindow extends JFrame implements ItemListener
{ JRadioButton button1,button2,button3;ButtonGroup fruit;
JLabel label ;JScrollPane scroll;JPanel panel;JSplitPane split;
Mywindow()
{
setSize(200,400);setVisible(true);
Container con=getContentPane(); fruit=new ButtonGroup();
button1=new JRadioButton("蘋果");fruit.add(button1);
button2=new JRadioButton("香蕉");fruit.add(button2);
button3=new JRadioButton("西瓜");fruit.add(button3);
label=new JLabel();panel=new JPanel();
scroll=new JScrollPane(label);
panel.add(button1);panel.add(button2);panel.add(button3);
split=new JSplitPane(JSplitPane.HORIZONTAL_SPLIT,true,panel, scroll);
con.add(split);
button1.addItemListener(this);button2.addItemListener(this);
button3.addItemListener(this);
addWindowListener(new WindowAdapter()
{public void windowClosing(WindowEvent e)
{System.exit(0);}});
}
public void itemStateChanged(ItemEvent e)
{if(e.getItemSelectable()==button1)
{label.setIcon(new ImageIcon("a.jpg")); }
else if(e.getItemSelectable()==button2)
{label.setIcon(new ImageIcon("b.jpg")); }
else if(e.getItemSelectable()==button3)
{label.setIcon(new ImageIcon("c.jpg")); }
}
}
public class Example25_13
{ public static void main(String args[])
{ Mywindow win=new Mywindow();win.pack();
}
}
25-例子14
import javax.swing.*;import java.awt.*;import java.awt.event.*; import java.net.*;
public class Example25_14 extends JApplet implements ItemListener
{ JComboBox choice1,choice2; JSplitPane split1,split2;
JLabel label; URL url;
public void init()
{ Container con=getContentPane(); String[] s={"蘋果", "香蕉" ,"西瓜"};
choice1=new JComboBox(s);choice2=new JComboBox();
label=new JLabel();choice2.setEditable(true);
split1=newJSplitPane(JSplitPane.HORIZONTAL_SPLIT,true,choice1,choice2);
split2=new JSplitPane(JSplitPane.VERTICAL_SPLIT,true,split1,label);
choice1.addItemListener(this);choice2.addItemListener(this);con.add(split2);
}
public void itemStateChanged(ItemEvent e)
{ if(e.getItemSelectable()==choice1)
{ if(choice1.getSelectedIndex()==0)
{ label.setIcon(new ImageIcon("a.jpg"));}
else if(choice1.getSelectedIndex()==1)
{ label.setIcon(new ImageIcon("b.jpg")); }
else if(choice1.getSelectedIndex()==2)
{label.setIcon(new ImageIcon("c.jpg"));}
}
else if(e.getItemSelectable()==choice2)
{ try{url=new URL((String)choice2.getSelectedItem());
label.setText("你正在連接到："+choice2.getSelectedItem());
}
catch(MalformedURLException g)
{ label.setText("不正確的URL:"+url); }
getAppletContext().showDocument(url);
}
}
}
25-例子15
import javax.swing.*;
import java.awt.*;
import java.awt.event.*;
public class Example25_15 extends JApplet implements ActionListener
{ JTextField text1;JPasswordField text2; JTextArea textarea;
JSplitPane split1,split2;
public void init()
{ Container con=getContentPane();
text1=new JTextField(8);text2=new JPasswordField(12);
text2.setEchoChar('*');textarea=new JTextArea(10,10);
textarea.setLineWrap(true);
textarea.setWrapStyleWord(true);
JPanel p1=new JPanel();JPanel p2=new JPanel();
p1.add(new Label("輸入姓名"));p1.add(text1);
p2.add(new Label("輸入密碼"));p2.add(text2);
split1=new JSplitPane(JSplitPane.HORIZONTAL_SPLIT,true,p1,p2);
JScrollPane pane=new JScrollPane(textarea);
split2=new JSplitPane(JSplitPane.VERTICAL_SPLIT,true,split1,pane);
text2.addActionListener(this);
con.add(split2,BorderLayout.CENTER);
}
public void actionPerformed(ActionEvent e)
{
if(e.getSource()==text2)
{ String s=new String(text2.getPassword());
if(s.equals("1999"))
textarea.setText("相聚2000，歡迎光臨！");
else
{textarea.setText("密碼不正確");text2.setText(null);}
}
}
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