標籤：java applet
用以下兩個類定義了一個applet：
import javax.swing.JApplet;public class VideoApplet extends JApplet{public void init() {add(new VideoPanel());}}
import java.awt.Dimension;import java.awt.GridLayout;import java.awt.event.ItemEvent;import java.awt.event.ItemListener;import javax.swing.JComboBox;import javax.swing.JLabel;import javax.swing.JPanel;import javax.swing.JTextField;public class VideoPanel extends JPanel implements ItemListener{private static final int DEFAULT_WIDTH = 300;private static final int DEFAULT_HEIGHT = 200;private JComboBox<Object> jcb1 = null;private JTextField jtf = null;private double price[] = { 0.0, 2.5, 2.0, 2.0, 2.0 };private int num = 0;public VideoPanel() {setLayout(new GridLayout(10, 1));JLabel jl1 = new JLabel("Movie List: ");String videos[] = { "none", "飛屋環遊記", "By My Side", "My love", "Apple Dream",};jcb1 = new JComboBox<Object>(videos);jtf = new JTextField();jtf.setEditable(false);jtf.setText("Movie Price $" + price[num]);add(jl1);add(jcb1);add(jtf);jcb1.addItemListener(this);}public void itemStateChanged(ItemEvent e) {num = jcb1.getSelectedIndex();jtf.setText("Movie Price $" + price[num]);}public Dimension getPreferredSize() {return new Dimension(DEFAULT_WIDTH, DEFAULT_HEIGHT);}}
還有一個test.html檔案，內容如下：
<html><head><title>VideoApplet</title></head><body><applet code="VideoApplet.class" width="300" height="300"></applet></body></html>
接下來就是在瀏覽器中運行applet了。
在瀏覽器中運行applet需要安裝相應的外掛程式，這個只需要按照提示安裝就行了。但是，一般情況下，依然不能運行applet，這時就需要把運行applet的網址放進“可運行網址列表”中，操作如下：
進入“控制台（Control Panel）”，點擊“程式（Programs）”，雙擊“Java”：
在運行出來的“Java控制台（Java Control Panel）”中選中“安全（Security）”：
點擊“編輯網址列表（Edit Site List）”，把要運行applet的網址放進去，結果如下：
然後在瀏覽器中訪問http://localhost:8080/test.html，會有如下提示：
點擊“運行（Run）”後，applet便正常運行，結果如下：
在瀏覽器中運行applet
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