Swing 将GUI制作成applet

大家好，为了我的研究任务，我需要将我的GUI程序制作成一个小程序，但我似乎无法使其工作，以下是我的工作：

公共类BookCenter扩展JFrame实现ActionListener{

private CardLayout cardManager;
private JPanel deck;
private JButton controls[];
private String names[] = { "Input", "Processing", "Display"};

public BookCentre(){
    super( "CardLayout" );
    Container container = getContentPane();
    deck = new JPanel();
    cardManager = new CardLayout(); 
    deck.setLayout( cardManager );  
    deck.add( card1Panel(), "c1" );
    deck.add( card2Panel(), "c2" );
    deck.add( card3Panel(), "c3" );
    JPanel buttons = new JPanel();
    buttons.setLayout( new GridLayout( 3, 1 ) );
    controls = new JButton[ names.length ];
    for ( int count = 0; count < controls.length; count++ ) {
        controls[ count ] = new JButton( names[ count ] );
        controls[ count ].addActionListener( this );
        buttons.add( controls[ count ] );
        container.add( buttons, BorderLayout.WEST );
        container.add( deck, BorderLayout.CENTER );
        setSize( 700, 500 );
        setVisible( true );}

}

}

}

}

} }

对于行：

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我尝试用“Applet”替换“JFrame”，但在整个代码中我开始出现许多错误。

Emm。。。问题很不清楚：但这里有一些提示

• A） 用JApplet替换JFrame
• B） 将main方法替换为applet init（）{}方法
• C） 编译项目
• D） 编写jnlp来启动它
• E） 编写正确的html启动器

。。。如果没有帮助，请向我们显示编译或运行期间抛出的堆栈跟踪，因为当前问题包含的问题详细信息较少

请缩进代码（使用逻辑一致的方法）。我觉得那乱七八糟的东西不可读。至于GUI，一个更好的选择可能是不进行任何转换，而是启动正在工作的（大概是基于

JFrame

的）应用程序。我试着用“Applet”替换“JFrame”，但是我的代码中出现了很多错误。1）你知道Swing提供了一个

JApplet

，对吗？2） 如果你不将“大量错误”复制/粘贴到帖子中，你希望任何人如何解决这些错误？

public JPanel card1Panel(){ 
    JPanel card1 = new JPanel();
card1.setLayout(null);
        Insets insets = card1.getInsets();
        card1.setSize(600, 300);

        JLabel label1 = new JLabel( "Enter Customer Information");
Dimension size1 = label1.getPreferredSize();
label1.setBounds(230, 5, size1.width, size1.height);

    JLabel label1a = new JLabel( "Customer Name:");
Dimension size1a = label1a.getPreferredSize();
label1a.setBounds(1, 65, size1a.width, size1a.height);

    JTextField userinput = new JTextField("");
Dimension size1b = label1a.getPreferredSize();
userinput.setBounds(265, 65, size1b.width, size1b.height);
String text = userinput.getText();

JLabel label1b = new JLabel( "Choose exactly three books: use CTRL Or SHIFT");
Dimension size1c = label1b.getPreferredSize();
label1b.setBounds(1, 110, size1c.width, size1c.height);

String[] selection = {"Deitel-Java How to Program", "Horstmann-Big Java", "Lewis-Software Solutions",  "Staugaard-Java for IS", "Sun-Core Java", "Hamilton-JDBC", "Jackson-Java By Example", "Riley-The Object of Java",  "Geary-Graphic Java", "Santry-Advanced Java2", "Bishop-Java Gently", "Wigglesworth-Advanced Java", "Liang-Intro to Java", "Lambert-Java"};
JList books = new JList(selection);
books.setVisibleRowCount(5);
books.setSelectionMode(ListSelectionModel.MULTIPLE_INTERVAL_SELECTION);
Dimension size1d = books.getPreferredSize();
books.setBounds(230, 150, size1d.width, size1d.height);
add(new JScrollPane (books));

JButton submit = new JButton("Submit");
Dimension size1e = submit.getPreferredSize();
submit.setBounds(100, 425, 400, size1e.height);



    card1.add(submit);
    card1.add(books);
    card1.add(userinput);
    card1.add(label1);
    card1.add(label1a);
    card1.add(label1b);

return card1;

public JPanel card2Panel(){
    JLabel label2 = new JLabel( "Processing", SwingConstants.CENTER );
    JPanel card2 = new JPanel();
    card2.add( label2 );
    return card2;

public JPanel card3Panel(){
    JLabel label3 = new JLabel( "card three" );
    JPanel card3 = new JPanel();
    card3.setLayout( new BorderLayout() );  
    card3.add( new JButton( "North" ), BorderLayout.NORTH);
    card3.add( new JButton( "West" ), BorderLayout.WEST );
    card3.add( new JButton( "East" ), BorderLayout.EAST );
    card3.add( new JButton( "South" ), BorderLayout.SOUTH);
    card3.add( label3, BorderLayout.CENTER );
    return card3;

public void actionPerformed( ActionEvent event )   {




    if ( event.getSource() == controls[ 0 ] )    
        cardManager.first( deck ); 

    else if ( event.getSource() == controls[ 1 ] )    
        cardManager.show( deck, "c2" ); 

    else if ( event.getSource() == controls[ 2 ] )
        cardManager.last( deck );           

public static void main( String args[] )   {
    BookCentre cardDeckDemo = new BookCentre();
    cardDeckDemo.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE );

public class BookCentre extends JFrame implements ActionListener {