package awt;
//CardLayout没办法分页显示,请大侠帮着指出错误来。
import java.awt.*;
import java.awt.event.*; //事件处理机制,下一节的内容
public class ThreePages implements MouseListener {
CardLayout layout=new CardLayout(); //实例化一个牌布局管理器对象
Frame f=new Frame("CardLayout");
Button page1Button;
Label page2Label; //Label是标签,实际上是一行字符串
TextArea page3Text; //多行多列的文本区域
Button page3Top;
Button page3Bottom;public static void main(String args[])
{ new ThreePages().go(); }public void go()
{
f.setLayout(layout); //设置为牌布局管理器layout
f.add(page1Button=new Button("Button page"),"page1Button"); /*第二个参数"page1Button"表示的是你对这层牌所取的名字*/
page1Button.addMouseListener(this); //注册监听器
f.add(page2Label=new Label("Label page"),"page2Label");
page2Label.addMouseListener(this); //注册监听器
Panel panel=new Panel();
panel.setLayout(new BorderLayout());
panel.add(page3Text=new TextArea("Composite page"),"Center");
page3Text.addMouseListener(this);
panel.add(page3Top=new Button("Top button") , "North");
page3Top.addMouseListener(this);
panel.add(page3Bottom=new Button("Bottom button") ,"South");
page3Bottom.addMouseListener(this);
f.add(panel,"panel");
f.setSize(200,200);
f.setVisible(true);
f.addWindowListener(new WindowAdapter(){public void windowClosing(WindowEvent e){System.exit(0);}});
}@Override
public void mouseClicked(MouseEvent arg0) {
// TODO Auto-generated method stub
}@Override
public void mouseEntered(MouseEvent arg0) {
// TODO Auto-generated method stub
}@Override
public void mouseExited(MouseEvent arg0) {
// TODO Auto-generated method stub
}@Override
public void mousePressed(MouseEvent arg0) {
// TODO Auto-generated method stub
}@Override
public void mouseReleased(MouseEvent arg0) {
// TODO Auto-generated method stub
}}
//CardLayout没办法分页显示,请大侠帮着指出错误来。
import java.awt.*;
import java.awt.event.*; //事件处理机制,下一节的内容
public class ThreePages implements MouseListener {
CardLayout layout=new CardLayout(); //实例化一个牌布局管理器对象
Frame f=new Frame("CardLayout");
Button page1Button;
Label page2Label; //Label是标签,实际上是一行字符串
TextArea page3Text; //多行多列的文本区域
Button page3Top;
Button page3Bottom;public static void main(String args[])
{ new ThreePages().go(); }public void go()
{
f.setLayout(layout); //设置为牌布局管理器layout
f.add(page1Button=new Button("Button page"),"page1Button"); /*第二个参数"page1Button"表示的是你对这层牌所取的名字*/
page1Button.addMouseListener(this); //注册监听器
f.add(page2Label=new Label("Label page"),"page2Label");
page2Label.addMouseListener(this); //注册监听器
Panel panel=new Panel();
panel.setLayout(new BorderLayout());
panel.add(page3Text=new TextArea("Composite page"),"Center");
page3Text.addMouseListener(this);
panel.add(page3Top=new Button("Top button") , "North");
page3Top.addMouseListener(this);
panel.add(page3Bottom=new Button("Bottom button") ,"South");
page3Bottom.addMouseListener(this);
f.add(panel,"panel");
f.setSize(200,200);
f.setVisible(true);
f.addWindowListener(new WindowAdapter(){public void windowClosing(WindowEvent e){System.exit(0);}});
}@Override
public void mouseClicked(MouseEvent arg0) {
// TODO Auto-generated method stub
}@Override
public void mouseEntered(MouseEvent arg0) {
// TODO Auto-generated method stub
}@Override
public void mouseExited(MouseEvent arg0) {
// TODO Auto-generated method stub
}@Override
public void mousePressed(MouseEvent arg0) {
// TODO Auto-generated method stub
}@Override
public void mouseReleased(MouseEvent arg0) {
// TODO Auto-generated method stub
}}
解决方案 »
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建议用javax.swing.JTabbedPane,比这个好用多了。
虽然有点麻烦。但管用。
import java.awt.*;
import java.awt.event.*;public class ThreePages {
CardLayout layout = new CardLayout();
Frame f = new Frame("CardLayout");
Panel mainPane = new Panel(); // 将三页内容放到这个主面板中 Button page1Button;
Label page2Label;
TextArea page3Text;
Button page3Top;
Button page3Bottom; public static void main(String args[]) {
new ThreePages().go();
} public void go() {
mainPane.setLayout(layout); //设置主面板为CardLayout布局
mainPane.add(page1Button = new Button("Button page"), "page1Button");
mainPane.add(page2Label = new Label("Label page"), "page2Label");
Panel panel = new Panel();
panel.setLayout(new BorderLayout());
panel.add(page3Text = new TextArea("Composite page"), "Center");
panel.add(page3Top = new Button("Top button"), "North");
panel.add(page3Bottom = new Button("Bottom button"), "South");
mainPane.add(panel, "panel");
Panel controller = new Panel(); // 添加一个控制面板和两个控制按钮
Button prev = new Button("previous");
Button next = new Button("next");
prev.addActionListener(new ActionListener() { // 为控制按钮添加事件监听
public void actionPerformed(ActionEvent e) {
layout.previous(mainPane); // 显示上一页
}
}
);
next.addActionListener(new ActionListener() { // 为控制按钮添加事件监听
public void actionPerformed(ActionEvent e) {
layout.next(mainPane); // 显示下一页
}
}
);
controller.add(prev);
controller.add(next);
f.setLayout(new BorderLayout());
f.add(controller, "North");
f.add(mainPane, "Center");
f.setSize(200, 200);
f.setVisible(true);
f.addWindowListener(new WindowAdapter() {
public void windowClosing(WindowEvent e) {
System.exit(0);
}
});
}
}
不过,如果用swing的JTabbedPane来做,则要简单得多得多,如下:
import java.awt.*;
import java.awt.event.*;
import javax.swing.*;public class ThreePagesSwing {
Frame f = new Frame("CardLayout");
JTabbedPane mainPane = new JTabbedPane(); // 设置一个JTabbedPane用作主面板 Button page1Button;
Label page2Label;
TextArea page3Text;
Button page3Top;
Button page3Bottom; public static void main(String args[]) {
new ThreePagesSwing().go();
} public void go() {
mainPane.add(page1Button = new Button("Button page"), "page1");
mainPane.add(page2Label = new Label("Label page"), "page2");
Panel panel = new Panel();
panel.setLayout(new BorderLayout());
panel.add(page3Text = new TextArea("Composite page"), "Center");
panel.add(page3Top = new Button("Top button"), "North");
panel.add(page3Bottom = new Button("Bottom button"), "South");
mainPane.add(panel, "panel");
f.add(mainPane); f.setSize(200, 200);
f.setVisible(true);
f.addWindowListener(new WindowAdapter() {
public void windowClosing(WindowEvent e) {
System.exit(0);
}
});
}
}
还有,主要的UI事件监听器都在awt.event中。
所以,开发swing界面也是少不了awt和awt.event这两个包的。