Question

当我在大学网络服务器上的html标签中运行我的代码时，我很难从主JApplet类调用其他JApplet：我有一个设计为JApplet的库数据库应用程序，当我在eclipse上运行并按下顾客功能按钮或管理功能按钮时，来自顾客类和管理类的JApplet工作正常，但当我在大学网络服务器上运行它并尝试在html标签中运行它并尝试按下patron功能或管理功能按钮没有任何反应没有弹出JFrame来自任何这些类的JApplet出现，我正在使用这样的html类标签：

<center>
<applet code="library/MainMenu.class" height="400" width="500">
</applet>
</center>

任何建议我应该添加或消除什么来运行项目或我做错了什么，我有点困惑。谢谢下面是我到目前为止的所有代码：

package library;

import java.applet.Applet;
import java.awt.*;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import javax.swing.*;

import library.PatronFunctionsMenu;

public class MainMenu extends JApplet implements ActionListener {

    private JFrame mainFrame;
    private JLabel mainMenulbl;
    private JButton patronFunctionBtn, administrativeFunctionBtn,
     quitBtn;
    private JPanel mainPanel;

    PatronFunctionsMenu patronJApplet;
    AdministrativeFunctionsMenu administrativeJApplet;



    public MainMenu() {
        mainFrame = new JFrame();
        mainPanel = new JPanel();
        mainMenulbl = new JLabel("MAIN MENU", SwingConstants.CENTER);
        mainMenulbl.setFont(new Font("Serif", Font.PLAIN, 18));
        patronFunctionBtn = new JButton("1-  Patron functions (ask for card number " +
                "then show submenu) " );
        administrativeFunctionBtn = new JButton("2-  Administrative functions");
        quitBtn = new JButton("3-  Quit");
        patronJApplet = new PatronFunctionsMenu();
        administrativeJApplet = new AdministrativeFunctionsMenu();
    }

    public void init() {

        mainFrame.setSize(600,400);
        mainFrame.setLayout(new BorderLayout());
        mainFrame.setTitle("MAIN MENU");
        mainFrame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);

        mainFrame.add(mainPanel);
        mainPanel.setLayout(new GridLayout(10,1));
        //adding a jlabel
        //patronFunctionBtn.setSize(80, 291);
        mainPanel.add(mainMenulbl);

        //adding jbuttons
        mainPanel.add(patronFunctionBtn);
        mainPanel.add(administrativeFunctionBtn);
        mainPanel.add(quitBtn);
        mainFrame.setVisible(true);

        patronFunctionBtn.addActionListener(this);
        administrativeFunctionBtn.addActionListener(this);
        quitBtn.addActionListener(this);

    }

    @Override
    public void actionPerformed(ActionEvent e) {
        // TODO Auto-generated method stub

        if (e.getSource() == patronFunctionBtn)

        { 
            JTextField textArea = new JTextField(15);
            int okCxl = JOptionPane.showConfirmDialog(SwingUtilities.getWindowAncestor(this),
                    textArea, "Enter Library Card Number and click ok!", JOptionPane.OK_CANCEL_OPTION);

                    if (okCxl == JOptionPane.OK_OPTION) {
                        String text = textArea.getText();


                        patronJApplet.start();
                        patronJApplet.init();
                        //JFrame patron = new JFrame();
                        //patron.findComponentAt(getLocation());
                        getContentPane().add(patronJApplet.getContentPane()); 
                        //setSize(800, 500); // not sure about this.  Usually better to call pack();
                        setVisible(true);
                    }


        }

        if (e.getSource() == administrativeFunctionBtn) {
        administrativeJApplet.start();
        administrativeJApplet.init();
        getContentPane().add(administrativeJApplet.getContentPane()); 
        setVisible(true);
    }

        if (e.getSource() == quitBtn)

        { 
            System.exit(0);
        }

    }


}

//PatronFunctionsMenu class
package library;

import java.applet.Applet;
import java.awt.*;
import java.awt.Font;
import java.awt.GridLayout;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import javax.swing.*;

public class PatronFunctionsMenu extends JApplet
        implements ActionListener {
    private JFrame patronFrame;
    private JPanel patronPanel;
    private JLabel patronLabel;
    private JButton bookCheckout;
    private JButton bookReturn;
    private JButton payFine;
    private JButton printLoanedBooksList;
    private JButton quit;

    public PatronFunctionsMenu() {

        patronFrame = new JFrame();
        patronPanel = new JPanel();
        patronLabel = new JLabel("PATRON FUNCTIONS MENU ", SwingConstants.CENTER);
        patronLabel.setFont(new Font("Serif", Font.PLAIN, 18));
        bookCheckout = new JButton("(1)-  Book Checkout");
        bookReturn = new JButton("(2)-  Book Return");
        payFine = new JButton("(3)-  Pay Fine");
        printLoanedBooksList = new JButton("(4)-  Print Loaned Books List");
        quit = new JButton("(5)-  Quit");
    }

    public void init(){

        /*
        // don't do this, just call pack() later
        //mainJFrame.setSize(600,400);
        mainJFrame.setLayout(new BorderLayout());
        mainJFrame.setTitle("Travel Agent System");
        mainJFrame.setBackground(Color.BLUE);


        mainJFrame.pack();
        // should be last.
        mainJFrame.setVisible(true);*/

        patronFrame.setSize(500, 400);
        patronFrame.setLayout(new BorderLayout());
        patronFrame.setTitle("PATRON FUNCTIONS MENU");
        patronFrame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);

        patronFrame.add(patronPanel);
        patronPanel.setLayout(new GridLayout(10,1));
        patronPanel.add(patronLabel, SwingConstants.CENTER);
        patronPanel.add(bookCheckout);
        patronPanel.add(bookReturn);
        patronPanel.add(bookReturn);
        patronPanel.add(payFine);
        patronPanel.add(printLoanedBooksList);
        patronPanel.add(quit);
        //patronFrame.pack();
        patronFrame.setVisible(true);

        quit.addActionListener(new ActionListener() {
             @Override
            public void actionPerformed(ActionEvent e) {
                 patronFrame.setVisible(false);
                 //PatronFunctionsMenu applet = new PatronFunctionsMenu();

                 }
        });

        patronPanel.add(quit);

    }

    @Override
    public void actionPerformed(ActionEvent e) {
        // TODO Auto-generated method stub

    }


}


//AdministrativeFunctionsMenu class
package library;

import java.awt.*;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import javax.swing.*;

public class AdministrativeFunctionsMenu extends JApplet
implements ActionListener {

    private JFrame administrativeFrame;
    private JPanel administrativePanel;

    private JLabel administrativeLabel;
    private JButton addBookButton;
    private JButton updateBookHoldingButton;
    private JButton searchBookButton;
    private JButton newPatronButton;
    private JButton printBranchInfoButton;
    private JButton quitAdministrativeButton;

    public AdministrativeFunctionsMenu() {

        administrativeFrame = new JFrame();
        administrativePanel = new JPanel();
        administrativeLabel = new JLabel("ADMINISTRATIVE FUNCTIONS MENU ", SwingConstants.CENTER);
        administrativeLabel.setFont(new Font("Serif", Font.PLAIN, 18));

        addBookButton = new JButton("(1)- Add a book");
        updateBookHoldingButton = new JButton("(2)- Update book holdings");
        searchBookButton =new JButton("(3)- Search book");
        newPatronButton = new JButton("(4)- New patron(add patron)");
        printBranchInfoButton = new JButton("(5) Print branch information");
        quitAdministrativeButton = new JButton("(6)- Quit");

    }

    public void init() {

        administrativeFrame.setSize(500, 400);
        administrativeFrame.setLayout(new BorderLayout());
        administrativeFrame.setTitle("ADMINISTRATIVE FUNCTIONS MENU");
        administrativeFrame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);

        administrativeFrame.add(administrativePanel);
        administrativePanel.setLayout(new GridLayout(10,1));
        administrativePanel.add(administrativeLabel);
        administrativePanel.add(addBookButton);
        administrativePanel.add(updateBookHoldingButton);
        administrativePanel.add(searchBookButton);
        administrativePanel.add(newPatronButton);
        administrativePanel.add(printBranchInfoButton);

        administrativePanel.add(quitAdministrativeButton);

        administrativeFrame.setVisible(true);

        quitAdministrativeButton.addActionListener(this);
    }


    @Override
    public void actionPerformed(ActionEvent e) {
        // TODO Auto-generated method stub

        if(e.getSource() == quitAdministrativeButton) {
            administrativeFrame.setVisible(false);
        }
    }

}

enter image description here

无法从html标记中的单个japplet调用japplet中的多个jframe

0 个答案: