3-Java-cardlayout布局和panel的应用.docx

Java_panel 的应用和cardlayout布局的使用程序import java.applet.*;import java.awt.*;import java.awt.event.*;public class Panel_Card extends Applet implements MouseListener{ Button b1=new Button(字号); Button b2=new Button(字体); Button b3=new Button(字色); Panel p1=new Panel(); Button ok=new Button(确定); Button esc=new Button(取消); Panel p2=new Panel(); Panel page1=new Panel(); Panel page2=new Panel(); Panel page3=new Panel(); Panel page123=new Panel(); CardLayout layout=new CardLayout(); public void init(){ p1.setLayout (new FlowLayout(FlowLayout.LEFT,0,0)); p1.add(b1); p1.add(b2); p1.add(b3); add(p1);//将panel1加入到this中page1.add(new Label(字号));//给panel page1加个标签 Choice mySelect=new Choice(); mySelect.add(五号); mySelect.add(小四号); mySelect.add(四号); page1.add(mySelect);page2.add(new Label(字体)); Checkbox c1=new Checkbox(加粗,false); Checkbox c2=new Checkbox(斜体,false); page2.add(c1); page2.add(c2);page3.add(new Label(字色)); Choice mySelect2=new Choice(); mySelect2.add(红色); mySelect2.add(黑色); mySelect2.add(蓝色); page3.add(mySelect2);page123.setLayout(layout); page123.add(page1,page1); page123.add(page2,page2); page123.add(page3,page3); add(page123); p2.add(ok); p2.add(esc); add(p2);layout.show(page123,page1); b1.addMouseListener(this); b2.addMouseListener(this); b3.addMouseListener(this); }//init public void mouseClicked(MouseEvent e){ if(e.getSource()==b1) layout.show(page123,page1); if(e.getSource()==b2) layout.show(page123,page2); if(e.getSource()==b3) layout.show(page123,page3); }//mouseClicked public void mousePressed(MouseEvent e){} public void mouseEntered(MouseEvent e){} public void mouseExited(MouseEvent e){} public void mouseReleased(MouseEvent e){}}//main结果：