java slider 使用改变背景颜色

Question

Java slider想要改变颜色，三个Color参数，滑块值改变但是容器panel背景并未发生变化，问问这是什么原因，怎么才能时背景颜色跟着滑块值改变而变化

```java
package fourth;

/**
 *
 * @author lenovo
 */
import javax.swing.*;
import java.awt.*;
import javax.swing.event.ChangeEvent;
import javax.swing.event.ChangeListener;
public class Fourth extends JFrame{

    /**
     * @param args the command line arguments
     */
    public static void main(String[] args) {
        // TODO code application logic here
        JFrame jf = new JFrame("测试窗口");
        jf.setSize(500, 500);
        jf.setLocationRelativeTo(null);

        JPanel panel = new JPanel();
        
        
        //三个文本框组件显示当前滑块组件数值
        JTextField text_1 = new JTextField(10);
        JTextField text_2 = new JTextField(10);   
        JTextField text_3 = new JTextField(10);
        
        // 创建一个滑块，最小值、最大值、初始值 分别为 0、255、125
        final JSlider slider_1 = new JSlider(0, 255,125);
        final JSlider slider_2 = new JSlider(0, 255,125);
        final JSlider slider_3 = new JSlider(0, 255,125);

        // 设置主刻度间隔
        slider_1.setMajorTickSpacing(50);
        slider_2.setMajorTickSpacing(50);
        slider_3.setMajorTickSpacing(50);

        // 设置次刻度间隔
        slider_1.setMinorTickSpacing(10);
        slider_2.setMinorTickSpacing(10);
        slider_3.setMinorTickSpacing(10);

        // 绘制 刻度 和 标签
        slider_1.setPaintTicks(true);
        slider_1.setPaintLabels(true);
        slider_2.setPaintTicks(true);
        slider_2.setPaintLabels(true);
        slider_3.setPaintTicks(true);
        slider_3.setPaintLabels(true);

        // 添加刻度改变监听器
        slider_1.addChangeListener(new ChangeListener() {
            @Override
            public void stateChanged(ChangeEvent e) {
                String x1=""+slider_1.getValue();
                text_1.setText(x1);
            }
        });
         slider_2.addChangeListener(new ChangeListener() {
            @Override
            public void stateChanged(ChangeEvent e) {
                String x2=""+slider_2.getValue();
                text_2.setText(x2);
            }
        });
          slider_3.addChangeListener(new ChangeListener() {
            @Override
            public void stateChanged(ChangeEvent e) {
                String x3=""+slider_3.getValue();
                text_3.setText(x3);
            }
        });

        
        // 添加滑块到内容面板
        panel.add(slider_1);
        panel.add(text_1);
        panel.add(slider_2);
        panel.add(text_2);
        panel.add(slider_3);
        panel.add(text_3);
        
        panel.setBackground(new Color(slider_1.getValue(),slider_2.getValue(),slider_3.getValue()));
        
        jf.setContentPane(panel);
        jf.setVisible(true);
    } 
}

```

Answer 1

java设置label背景色_java – 如何使用JSlider更改JLabel背景颜色_冲就完事儿啦的博客-CSDN博客 JSlider带有“ChangeListener”接口并处理“ChangeEvent”,当滑块值改变时,它将改变JLabel背景颜色.请帮助我,我无法做到这一点.提前谢谢.我不能申请JLabelpackage org.kodejava.example.swing;import javax.swing.*;import javax.swing.event.ChangeEvent;import jav... https://blog.csdn.net/weixin_32273747/article/details/114502829