Java：防止按键时发出哔哔声

Posted 2023-02-25

【中文标题】Java：防止按键时发出哔哔声

【英文标题】：Java: prevent beep sound on key press

【发布时间】：2010-12-01 20:16:41

【问题描述】：

我有一个从浏览器启动的 Java 程序，它使用各种 java.awt.Button 按钮运行。点进去之后就好了。但是当按下与该按钮对应的键时，Windows 会发出“默认哔”声。

按钮是这样创建的：

import java.awt.GridLayout;
import java.awt.BorderLayout;
import java.io.*;
import java.awt.Panel;
import java.awt.Button;
import java.awt.Font;
import java.awt.event.*;
import java.lang.Integer;

public class buttonPne extends Panel implements ActionListener, constants 

    private pClient parent = null;
    private labelPne buttonLabel[] = new labelPne[8];
    private Panel buttonPanel[] = new Panel[8];
    public Button theButtons[] = new Button[8];
    private boolean buttonStatus[] = new boolean[8];

    public buttonPne(pClient c) 

        parent = c;

        this.setLayout(new GridLayout(1, 8, 1, 0));

        for (int i = 0; i < 8; i++) 

            buttonLabel[i] = new labelPne(parent);
            buttonLabel[i].setSize(9, 9);

            theButtons[i] = new Button();
            theButtons[i].setFont(ButtonFont);
            theButtons[i].setActionCommand(Integer.toString(i));
            theButtons[i].addActionListener(this);
            theButtons[i].addKeyListener(parent);

            buttonPanel[i] = new Panel();
            buttonPanel[i].setBackground(backgroundColor);
            buttonPanel[i].setLayout(new BorderLayout());
            buttonPanel[i].add("North", theButtons[i]);
            buttonPanel[i].add("South", buttonLabel[i]);

            this.add(buttonPanel[i]);
        

        Deactivate();
    

按键的处理方式如下：

import java.awt.event.KeyEvent;

...

public class pClient extends Applet implements KeyListener, constants 

...

    f.addKeyListener(this);

...

public void keyPressed(KeyEvent evt) 

    int theKey;

    theKey = evt.getKeyCode();

    switch(theKey) 

    case KeyEvent.VK_1:
    case KeyEvent.VK_F1:
        buttons.DoButton(0);
        break;

...

public void DoButton(int theNumber) 

    if (buttonStatus[theNumber]) 

        if (parent.pollSendFlag(BUTTONS)) 

            parent.chat.takeFocus();
            parent.compass.Deactivate();
            Deactivate();
        
    
    return;

如何阻止按键时出现默认蜂鸣声？

【参考方案1】：

使用 Swing 组件而不是 AWT 组件。