📄 comboboxesframe.html

📁 中文JAVA编程思想第二版,一本很好的JAVA入门书籍!

💻 HTML

字号:

<html><head><title>Display page for ComboBoxes at www.BruceEckel.com</title></head><FONT FACE="Verdana,Tahoma,Arial,Helvetica,Sans"><H2>ComboBoxes.java</H2><hr></FONT>
<OBJECT classid="clsid:8AD9C840-044E-11D1-B3E9-00805F499D93"
    width="200" height="100" align="baseline"
    codebase="http://java.sun.com/products/plugin/1.2.2/jinstall-1_2_2-win.cab#Version=1,2,2,0">
<PARAM NAME="code" VALUE="ComboBoxes.class">
<PARAM NAME="codebase" VALUE=".">
<PARAM NAME="type" VALUE="application/x-java-applet;version=1.2.2">
<COMMENT>
    <EMBED type="application/x-java-applet;version=1.2.2" 
       width="200" height="100" align="baseline" 
       code="ComboBoxes.class" 
       codebase="."
       pluginspage="http://java.sun.com/products/plugin/1.2/plugin-install.html">
    <NOEMBED>
    </COMMENT>
       No Java 2 support for APPLET!!
    </NOEMBED></EMBED>
</OBJECT>
<FONT SIZE="+3"><PRE><B>
//: c13:ComboBoxes.java
// From 'Thinking in Java, 2nd ed.' by Bruce Eckel
// www.BruceEckel.com. See copyright notice in CopyRight.txt.
// Using drop-down lists.
// &lt;applet code=ComboBoxes
// width=200 height=100&gt; &lt;/applet&gt;
import javax.swing.*;
import java.awt.event.*;
import java.awt.*;
import com.bruceeckel.swing.*;

public class ComboBoxes extends JApplet {
  String[] description = { "Ebullient", "Obtuse",
    "Recalcitrant", "Brilliant", "Somnescent",
    "Timorous", "Florid", "Putrescent" };
  JTextField t = new JTextField(15);
  JComboBox c = new JComboBox();
  JButton b = new JButton("Add items");
  int count = 0;
  public void init() {
    for(int i = 0; i &lt; 4; i++)
      c.addItem(description[count++]);
    t.setEditable(false);
    b.addActionListener(new ActionListener() {
      public void actionPerformed(ActionEvent e){
        if(count &lt; description.length)
          c.addItem(description[count++]);
      }
    });
    c.addActionListener(new ActionListener() {
      public void actionPerformed(ActionEvent e){
        t.setText("index: "+ c.getSelectedIndex()
          + "   " + ((JComboBox)e.getSource())
          .getSelectedItem());
      }
    });
    Container cp = getContentPane();
    cp.setLayout(new FlowLayout());
    cp.add(t);
    cp.add(c);
    cp.add(b);
  }
  public static void main(String[] args) {
    Console.run(new ComboBoxes(), 200, 100);
  }
} ///:~
</B></PRE></FONT></body></html>

⌨️ 快捷键说明

复制代码 Ctrl + C

搜索代码 Ctrl + F

全屏模式 F11

切换主题 Ctrl + Shift + D

显示快捷键 ?

增大字号 Ctrl + =

减小字号 Ctrl + -