Java 如何将JSlider SELECT值设置为全局变量?
有人知道我如何在JSlider的事件处理程序中发送所选值,Java 如何将JSlider SELECT值设置为全局变量?,java,swing,global-variables,return,jslider,Java,Swing,Global Variables,Return,Jslider,有人知道我如何在JSlider的事件处理程序中发送所选值,stateChanged,并将其设置为全局变量吗 比如说 public class Slider extends JPanel { public JSlider slider; public UserFrame frame; public double[] priceRange; public static void main(String[] args) throws ClassNotFoundExc
stateChanged
,并将其设置为全局变量吗
比如说
public class Slider extends JPanel {
public JSlider slider;
public UserFrame frame;
public double[] priceRange;
public static void main(String[] args) throws ClassNotFoundException, SQLException {
new Slider();
}
public Slider() throws ClassNotFoundException, SQLException {
slider = new JSlider();
priceRange = new double[2];
slider.setBorder(BorderFactory.createTitledBorder("Maximum Price in SEK"));
/*
* The minimum and maximum values are queried from the database. Those
* values are then rounded up (maximum) to the nearest 10 SEK.
* For example, if the minimum is 67 SEK and the maximum 95 SEK, then
* the displayed range is [70, 100].
*/
int min = (getMinimumPrice() / 10) * 10 + 10;
int max = (getMaximumPrice() / 10) * 10 + 10;
slider.setMajorTickSpacing(10);
slider.setMinorTickSpacing(5);
slider.setMinimum(min);
slider.setMaximum(max);
slider.setPaintTicks(true);
slider.setPaintLabels(true);
add(slider);
}
public void stateChanged(ChangeEvent e) {
JSlider source = (JSlider)e.getSource();
if (!source.getValueIsAdjusting()) {
slider.getModel().setValue(slider.getModel().getValue());
priceRange[0] = slider.getModel().getValue();
}
}
}
。。。依此类推,忽略方法getMinimum
和getMaximum
,它们只是检索我数据库中的最高值和最低值,但假设当用户释放JSlider旋钮时,我只想将其设置为priceRange[0]
。我怎样才能做到这一点?我试着创建一个模型,并设置每次状态发生变化时,我也会在主代码集中的actionListener中进行外部设置,例如
priceRange[0] = slider.getModel().getValue();
然后把结果打印出来,得到我设定的最小值
我真的很感谢你的进一步建议
祝你假期愉快!:)
祝你一切顺利,
马库斯只需删除以下几行:
slider.getModel().setValue(slider.getModel().getValue());
priceRange[0] = slider.getModel().getValue();
并插入以下内容:
priceRange[0] = (double)slider.getValue();
祝你好运
另外,您在哪里实现了ChangeListener
接口