小程序未显示完整

Question

我刚刚创建了一个小程序

public class HomeApplet extends JApplet {

    private static final long serialVersionUID = -7650916407386219367L;

    //Called when this applet is loaded into the browser.
    public void init() {
        //Execute a job on the event-dispatching thread; creating this applet's GUI.
//      setSize(400, 400);
        try {
            SwingUtilities.invokeAndWait(new Runnable() {
                public void run() {
                    createGUI();
                }
            });
        } catch (Exception e) { 
            System.err.println("createGUI didn't complete successfully");
        }
    }

    private void createGUI() {
        RconSection rconSection = new RconSection();
        rconSection.setOpaque(true); 

//      CommandArea commandArea = new CommandArea();
//      commandArea.setOpaque(true); 

        JTabbedPane tabbedPane = new JTabbedPane();
//      tabbedPane.setSize(400, 400);
        tabbedPane.addTab("Rcon Details", rconSection);
//      tabbedPane.addTab("Commad Area", commandArea); 


        setContentPane(tabbedPane);       
    }
}

，其中第一个选项卡是：

package com.rcon;

import java.awt.BorderLayout;
import java.awt.GridLayout;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;

import javax.swing.JButton;
import javax.swing.JLabel;
import javax.swing.JOptionPane;
import javax.swing.JPanel;
import javax.swing.JTextField;

import com.Bean.RconBean;
import com.util.Utility;

public class RconSection extends JPanel implements ActionListener{
    /**
     * 
     */
    private static final long serialVersionUID = -9021500288377975786L;
    private static String TEST_COMMAND = "test";
    private static String CLEAR_COMMAND = "clear";
    private static JTextField ipText = new JTextField();
    private static JTextField portText = new JTextField();
    private static JTextField rPassText = new JTextField();
    //      private DynamicTree treePanel;

    public RconSection() {
//      super(new BorderLayout());
        JLabel ip = new JLabel("IP");
        JLabel port = new JLabel("Port");
        JLabel rPass = new JLabel("Rcon Password");

        JButton testButton = new JButton("Test");
        testButton.setActionCommand(TEST_COMMAND);
        testButton.addActionListener(this);

        JButton clearButton = new JButton("Clear");
        clearButton.setActionCommand(CLEAR_COMMAND);
        clearButton.addActionListener(this);

        JPanel panel = new JPanel(new GridLayout(3,2));
        panel.add(ip);
        panel.add(ipText);
        panel.add(port);
        panel.add(portText);
        panel.add(rPass);
        panel.add(rPassText);

        JPanel panel1 = new JPanel(new GridLayout(1,3));
        panel1.add(testButton);
        panel1.add(clearButton);

        add(panel);
        add(panel1);
//      add(panel, BorderLayout.NORTH);
//      add(panel1, BorderLayout.SOUTH);
    }

    @Override
    public void actionPerformed(ActionEvent arg0) {
        if(arg0.getActionCommand().equals(TEST_COMMAND)){
            String ip = ipText.getText().trim();
            if(!Utility.checkIp(ip)){
                ipText.requestFocusInWindow();
                ipText.selectAll();
                JOptionPane.showMessageDialog(this,"Invalid Ip!!!");
                return;
            }
            String port = portText.getText().trim();
            if(port.equals("") ||  !Utility.isIntNumber(port)){
                portText.requestFocusInWindow();
                portText.selectAll();
                JOptionPane.showMessageDialog(this,"Invalid Port!!!");
                return;
            }
            String pass = rPassText.getText().trim();
            if(pass.equals("")){
                rPassText.requestFocusInWindow();
                rPassText.selectAll();
                JOptionPane.showMessageDialog(this,"Enter Rcon Password!!!");
                return;
            }
            RconBean rBean = RconBean.getBean();
            rBean.setIp(ip);
            rBean.setPassword(pass);
            rBean.setPort(Integer.parseInt(port));
            if(!Utility.testConnection()){
                rPassText.requestFocusInWindow();
                rPassText.selectAll();
                JOptionPane.showMessageDialog(this,"Invalid Rcon!!!");
                return;
            }else{
                JOptionPane.showMessageDialog(this,"Correct Rcon!!!");
                return;
            }
        }
        else if(arg0.getActionCommand().equals(CLEAR_COMMAND)){
            ipText.setText("");
            portText.setText("");
            rPassText.setText("");
        }
    }
}

它显示为

已裁剪了一些数据如何完整显示它并使小程序也不可调整大小。我尝试了 setSize(400, 400); 但它没有帮助内部区域保持不变而外部边界增加

Answer 1

这是布局的另一种变体。使用@Andrew的tag-in-source方法，很容易从命令行进行测试：

$ /usr/bin/appletviewer HomeApplet.java

// <applet code='HomeApplet' width='400' height='200'></applet>
import java.awt.BorderLayout;
import java.awt.GridLayout;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import javax.swing.JApplet;
import javax.swing.JButton;
import javax.swing.JLabel;
import javax.swing.JPanel;
import javax.swing.JTabbedPane;
import javax.swing.JTextField;
import javax.swing.SwingUtilities;

public class HomeApplet extends JApplet {

    @Override
    public void init() {
        try {
            SwingUtilities.invokeAndWait(new Runnable() {

                @Override
                public void run() {
                    createGUI();
                }
            });
        } catch (Exception e) {
            e.printStackTrace(System.err);
        }
    }

    private void createGUI() {
        JTabbedPane tabbedPane = new JTabbedPane();
        tabbedPane.addTab("Rcon1", new RconSection());
        tabbedPane.addTab("Rcon2", new RconSection());
        this.add(tabbedPane);
    }

    private static class RconSection extends JPanel implements ActionListener {

        private static final String TEST_COMMAND = "test";
        private static final String CLEAR_COMMAND = "clear";
        private JTextField ipText = new JTextField();
        private JTextField portText = new JTextField();
        private JTextField rPassText = new JTextField();

        public RconSection() {
            super(new BorderLayout());
            JLabel ip = new JLabel("IP");
            JLabel port = new JLabel("Port");
            JLabel rPass = new JLabel("Rcon Password");
            JButton testButton = new JButton("Test");
            testButton.setActionCommand(TEST_COMMAND);
            testButton.addActionListener(this);
            JButton clearButton = new JButton("Clear");
            clearButton.setActionCommand(CLEAR_COMMAND);
            clearButton.addActionListener(this);
            JPanel panel = new JPanel(new GridLayout(3, 2));
            panel.add(ip);
            panel.add(ipText);
            panel.add(port);
            panel.add(portText);
            panel.add(rPass);
            panel.add(rPassText);
            JPanel buttons = new JPanel(); // default FlowLayout
            buttons.add(testButton);
            buttons.add(clearButton);
            add(panel, BorderLayout.NORTH);
            add(buttons, BorderLayout.SOUTH);
        }

        @Override
        public void actionPerformed(ActionEvent e) {
            System.out.println(e);
        }
    }
}

Answer 2

正如我在评论中提到的，这个问题实际上是关于如何在容器中布局组件。此示例假设您希望向文本字段和标签添加额外的空间。小程序的大小在 HTML 中设置。

200x130 200x150

/*
<applet
  code='FixedSizeLayout'
  width='200'
  height='150'>
</applet>
*/
import java.awt.*;
import javax.swing.*;

public class FixedSizeLayout extends JApplet {
    public void init() {
        SwingUtilities.invokeLater(new Runnable() {
            public void run() {
                initGui();
            }
        });
    }

    private void initGui() {
        JTabbedPane tb = new JTabbedPane();
        tb.addTab("Rcon Details", new RconSection());

        setContentPane(tb);
        validate();
    }
}

class RconSection extends JPanel {
    private static String TEST_COMMAND = "test";
    private static String CLEAR_COMMAND = "clear";
    private static JTextField ipText = new JTextField();
    private static JTextField portText = new JTextField();
    private static JTextField rPassText = new JTextField();

    public RconSection() {
        super(new BorderLayout(3,3));
        JLabel ip = new JLabel("IP");
        JLabel port = new JLabel("Port");
        JLabel rPass = new JLabel("Rcon Password");

        JButton testButton = new JButton("Test");
        testButton.setActionCommand(TEST_COMMAND);

        JButton clearButton = new JButton("Clear");
        clearButton.setActionCommand(CLEAR_COMMAND);

        JPanel panel = new JPanel(new GridLayout(3,2));
        panel.add(ip);
        panel.add(ipText);
        panel.add(port);
        panel.add(portText);
        panel.add(rPass);
        panel.add(rPassText);

        JPanel panel1 = new JPanel(new FlowLayout(FlowLayout.CENTER,5,5));
        panel1.add(testButton);
        panel1.add(clearButton);

        add(panel, BorderLayout.CENTER);
        add(panel1, BorderLayout.SOUTH);
    }

    public static void main(String[] args) {
        SwingUtilities.invokeLater(new Runnable() {
            public void run() {
                Container c = new RconSection();
                JOptionPane.showMessageDialog(null, c);
            }
        });
    }
}

Answer 3

小程序查看器的大小不取决于您的代码。

Answer 4

JApplet不是窗口，所以在java代码中你不能写japplet尺寸。您必须更改运行设置。我不知道其他 ide 中的具体位置，但在 Eclipse 中，您可以在“项目属性”->“项目属性”中更改尺寸。运行/调试设置->单击您的启动配置文件（对我来说只有 1 个 - 主类）->编辑->参数。在那里您可以选择小程序的宽度和高度。保存更改即可开始