blocks|key|3990686|text|我刚刚用JSlider和基本的Synth+LAF创建了一个演示，我可以确认设置这些属性似乎完全没有效果，这很奇怪，也非常恼人。|type|unstyled|depth|inlineStyleRanges|offset|length|style|CODE|entityRanges|data|3990687|我看过SynthSliderUI，我可以看到protected+boolean+paintValue是在private+void+updateStyle(JSlider+c)中设置的，所以如果您要在这个类中创建一个自定义扩展，将paintValue的值设置为false，然后使用setUI()将滑块的UI设置为新的UI，您可能会更接近。或者完全覆盖paint方法，从原始代码中复制代码，但删除绘制Thumb值的部分。|3990688|现在，SynthSliderUI本身是包私有的，但这并不是真正的问题，因为您使用的是客户端提供的LAF。如果他们的自定义滑块UI类是公共的和非最终的，你可以像我上面描述的那样制作一个经过修改的版本，并将其应用到你的滑块上。|3990689|如果是最终结果，那么您可以使用反射来更改paintValue字段，作为最后的手段(可能就在绘制滑块之前)。下面的方法适用于我(去掉将字段设置为false的反射调用，以查看绘制的Thumb值)：|3990690|import+java.awt.BorderLayout;
import+java.lang.reflect.Field;

import+javax.swing.JFrame;
import+javax.swing.JSlider;
import+javax.swing.SwingUtilities;
import+javax.swing.UIManager;

public+class+SliderDemo+{

++++public+static+void+main(String[]+args)+throws+Exception+{
++++++++UIManager.setLookAndFeel("javax.swing.plaf.synth.SynthLookAndFeel");

++++++++Class<?>+sliderUIClass+=+Class.forName("javax.swing.plaf.synth.SynthSliderUI");
++++++++final+Field+paintValue+=+sliderUIClass.getDeclaredField("paintValue");
++++++++paintValue.setAccessible(true);

++++++++SwingUtilities.invokeAndWait(new+Runnable()+{
++++++++++++@Override
++++++++++++public+void+run()+{
++++++++++++++++JFrame+f+=+new+JFrame();
++++++++++++++++f.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
++++++++++++++++f.setLayout(new+BorderLayout());

++++++++++++++++JSlider+slider+=+new+JSlider(3,+6,+4);
++++++++++++++++try+{
++++++++++++++++++++paintValue.set(slider.getUI(),+false);
++++++++++++++++}+catch+(Exception+e)+{
++++++++++++++++++++throw+new+RuntimeException(e);
++++++++++++++++}
++++++++++++++++f.add(slider,+BorderLayout.CENTER);

++++++++++++++++f.pack();
++++++++++++++++f.setVisible(true);
++++++++++++}
++++++++});
++++}

}|code-block|syntax|javascript|3990691|entityMap^0|4|7|0|3|D|M|S|1G|Z|36|A|3V|7|0|3|D|0|K|A|0|0^^$0|@$1|2|3|4|5|6|7|S|8|@$9|T|A|U|B|C]]|D|@]|E|$]]|$1|F|3|G|5|6|7|V|8|@$9|W|A|X|B|C]|$9|Y|A|Z|B|C]|$9|10|A|11|B|C]|$9|12|A|13|B|C]|$9|14|A|15|B|C]]|D|@]|E|$]]|$1|H|3|I|5|6|7|16|8|@$9|17|A|18|B|C]]|D|@]|E|$]]|$1|J|3|K|5|6|7|19|8|@$9|1A|A|1B|B|C]]|D|@]|E|$]]|$1|L|3|M|5|N|7|1C|8|@]|D|@]|E|$O|P]]|$1|Q|3|-4|5|6|7|1D|8|@]|D|@]|E|$]]]|R|$]]

I just created a demo with a <code>JSlider</code> and using the basic Synth LAF, and I can confirm that setting those properties appears to have no effect at all, which is odd, and very annoying too.

I have looked at <code>SynthSliderUI</code> and I can see the <code>protected boolean paintValue</code> being set in <code>private void updateStyle(JSlider c)</code>, so if you were to make a custom extension this class, set the value of <code>paintValue</code> to false, and then set your slider's UI to the new UI with <code>setUI()</code>, you might get closer. Either that, or completely override the paint methods, copying code out of the original but removing the part that paints the thumb value.

Now, <code>SynthSliderUI</code> itself is package-private, but that isn't really the issue anyway since you're using a client-provided LAF. If their custom slider UI class is public and non-final, you can make a hacked version as I described above, and apply it to your slider.

If it's final, then you might be able to use reflection to change that <code>paintValue</code> field as a last resort (maybe just before painting your slider). The following hack works for me (take out the reflection call that sets the field to false to see the thumb value being painted):

<pre><code>import java.awt.BorderLayout;
import java.lang.reflect.Field;

import javax.swing.JFrame;
import javax.swing.JSlider;
import javax.swing.SwingUtilities;
import javax.swing.UIManager;

public class SliderDemo {

 public static void main(String[] args) throws Exception {
 UIManager.setLookAndFeel("javax.swing.plaf.synth.SynthLookAndFeel");

 Class&lt;?&gt; sliderUIClass = Class.forName("javax.swing.plaf.synth.SynthSliderUI");
 final Field paintValue = sliderUIClass.getDeclaredField("paintValue");
 paintValue.setAccessible(true);

 SwingUtilities.invokeAndWait(new Runnable() {
 @Override
 public void run() {
 JFrame f = new JFrame();
 f.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
 f.setLayout(new BorderLayout());

 JSlider slider = new JSlider(3, 6, 4);
 try {
 paintValue.set(slider.getUI(), false);
 } catch (Exception e) {
 throw new RuntimeException(e);
 }
 f.add(slider, BorderLayout.CENTER);

 f.pack();
 f.setVisible(true);
 }
 });
 }

}</code></pre>

blocks|key|326607|text|在调用initComponents()之前调用UIManager.put("Slider.paintValue",+false)对我来说很管用。|type|unstyled|depth|inlineStyleRanges|offset|length|style|CODE|entityRanges|data|326608|entityMap^0|3|G|N|15|0^^$0|@$1|2|3|4|5|6|7|H|8|@$9|I|A|J|B|C]|$9|K|A|L|B|C]]|D|@]|E|$]]|$1|F|3|-4|5|6|7|M|8|@]|D|@]|E|$]]]|G|$]]

Calling <code>UIManager.put("Slider.paintValue", false)</code> before the call to <code>initComponents()</code> worked for me.

I have a little problem with my JSlider, that I haven't been able to solve. To explain the situation a little, I have to do a JSlider going from 0 to 20, through 0.1 steps. I tricked my way out of problems by creating a JSlider from 0 to 200, and redefined the labels under the slider to display the corrent percentages instead of the integer values.

But I have one last problem : I'm using a custom L&amp;F (that I can't change, obviously, as it is from the client), that displays the value over the slider thumb. However, this value is displayed...in its standard way, as an integer. From what I've been able to grasp, this display is related to the <code>Slider.paintValue</code> property, as I can see in <code>javax.swing.plaf.synth.SynthSliderUI</code> source code. However, I've been dramatically unable to remove it.

What I've tried for now :

<pre><code>UIManager.getLookAndFeelDefaults().put("Slider.paintValue", false);
UIManager.put("Slider.paintValue", false);
</code></pre>

None of those two changed anything.

Is there a Swing guru around here who could get me out of this ?

Remove value displaying over thumb in JSlider

翻译质量差，导致语言生硬或混乱。

没有提供实际的解决方法或示例。

解答不清晰，无法理解或解决问题。

页面排版不美观，阅读体验差。

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我的JSlider出了点小问题，我还没能解决。为了稍微解释一下这种情况，我必须执行一个从0到20的JSlider，历经0.1个步骤。我通过创建一个从0到200的JSlider来解决问题，并重新定义了滑块下的标签，以显示当前百分比而不是整数值。但我还有最后一个问题:我正在使用一个自定义的L&F (显然，我不能更改它，因为...

问在JSlider中删除显示在拇指上方的值
EN

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