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如何阅读JSlider的价值?阅读JSlider的价值
我在我的程序中使用了滑块,这是我以前没有使用的东西,但我正在努力显示对其所做的更改!
问题是,当您打开程序(50)时,JLabel
显示滑块的值,但是当您更改标签不包含的值时。
下面是代码:
设置滑块(在setUpMenuItems类):
sensitivitySlider2 = new JSlider();//direction , min , max , current
sensitivitySlider2.setFont(new Font("Calibri",Font.BOLD,10));
sensitivitySlider2.setMajorTickSpacing(10);
sensitivitySlider2.setMinorTickSpacing(1);
sensitivitySlider2.setPaintLabels(true);
sensitivitySlider2.setPaintTicks(true);
sensitivitySlider2.setPaintTrack(true);
sensitivitySlider2.setAutoscrolls(true);
sensitivitySlider2.setBackground(Color.WHITE);
sensitivitySlider2.setBounds (15,200,250,100);
propertiesPanel.add(sensitivitySlider2);
建立监听器:
private void registerComponentsForEvents()
{
// Register all the JButton objects for action events
miniButton.addActionListener (this);
applyButton.addActionListener (this);
exitButton.addActionListener (this);
sensitivitySlider2.addChangeListener(this);
}
窗口监听器,并宣布方法做出具体:
void addWindowListener(Window w) {
w.addWindowListener(this);
}
//React to window events.
public void windowOpened(WindowEvent e) {
}
public void windowClosing(WindowEvent e) {
}
public void windowClosed(WindowEvent e) {
}
public void windowActivated(WindowEvent e) {
}
public void windowDeactivated(WindowEvent e) {
}
public void windowDeiconified(WindowEvent e) {
}
public void windowIconified(WindowEvent e) {
}
的ChangeEvent:
public void stateChanged(ChangeEvent e) {
JSlider source = (JSlider)e.getSource();
if (!source.getValueIsAdjusting()) {
int sleepSense = (int)source.getValue();
}
}
,然后该行设置一个JLabel作为值:
sleepSense2 = String.valueOf(sleepSense);
*“这里是代码:”*“WindowListener”与地球有什么关系?为了更快地获得更好的帮助,请发布[SSCCE](http://sscce.org/)。 –
@AndrewThompson我从建立Jslider的教程中学到了它,我用我苗条的知识抓着吸管 – Phil
通过阅读链接使你的知识变得更加丰富。 ..和'JSlider'有两个大写字母。如果你不能拼写它,复制/粘贴。 –