JSlider的用法

[java]代码库
package com.sxt.img;
 
import java.awt.BorderLayout;
import java.awt.Component;
import java.util.Dictionary;
import java.util.Hashtable;
 
import javax.swing.Box;
import javax.swing.BoxLayout;
import javax.swing.JFrame;
import javax.swing.JLabel;
import javax.swing.JSlider;
import javax.swing.JTextField;
import javax.swing.event.ChangeEvent;
import javax.swing.event.ChangeListener;
 
public class JSliderTest
{
    JFrame frame = new JFrame("JSlider测试");
    Box sliderBox = new Box(BoxLayout.Y_AXIS);
    JTextField showValue = new JTextField();
    ChangeListener listener = null;
 
    public void init()
    {
        listener = new ChangeListener()
        {
            @Override
            public void stateChanged(ChangeEvent e)
            {
                JSlider slider = (JSlider) e.getSource();
                showValue.setText("当前值：" + slider.getValue());
            }
        };
 
        JSlider slider = new JSlider();
        addSlider(slider, "普通滚动条");
 
        slider = new JSlider();
        slider.setExtent(30);// 设置滚动条的保留区为30
        addSlider(slider, "保留区为30");
 
        slider = new JSlider(30, 200);
        slider.setPaintTicks(true);
        slider.setMajorTickSpacing(20);
        slider.setMinorTickSpacing(5);
        addSlider(slider, "带刻度");
 
        slider = new JSlider();
        slider.setSnapToTicks(true);// 设置滚动条只停留在有刻度的地方
        slider.setPaintTicks(true);
        slider.setMinorTickSpacing(5);
        slider.setMajorTickSpacing(100);
        addSlider(slider, "滑块停在刻度处");
 
        slider = new JSlider();
        slider.setPaintTrack(false);
        slider.setPaintTicks(true);
        slider.setMinorTickSpacing(5);
        slider.setMajorTickSpacing(100);
        addSlider(slider, "没有滑动轨道的滚动条");
 
        slider = new JSlider();
        slider.setPaintTicks(true);
        slider.setMajorTickSpacing(100);
        slider.setMinorTickSpacing(5);
        slider.setInverted(true);
        addSlider(slider, "设置没有反向的滚动条");
 
        slider = new JSlider();
        slider.setPaintTicks(true);
        slider.setMinorTickSpacing(5);
        slider.setMajorTickSpacing(100);
        slider.setPaintLabels(true);// 设置刻度标签
        addSlider(slider, "数值刻度标签");
 
        slider = new JSlider();
        slider.setPaintTicks(true);
        slider.setMinorTickSpacing(5);
        slider.setMajorTickSpacing(100);
        slider.setPaintLabels(true);
        Dictionary<Integer, Component> labels = new Hashtable<Integer, Component>();
        labels.put(0, new JLabel("A"));
        labels.put(20, new JLabel("B"));
        labels.put(40, new JLabel("C"));
        labels.put(60, new JLabel("D"));
        labels.put(80, new JLabel("E"));
        labels.put(100, new JLabel("F"));
        slider.setLabelTable(labels);
        addSlider(slider, "JLable标签");
         
        frame.add(sliderBox);
        frame.add(showValue, BorderLayout.SOUTH);
        frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        frame.pack();
        frame.setVisible(true);
    }
 
    public void addSlider(JSlider slider, String description)
    {
        slider.addChangeListener(listener);
        Box box = new Box(BoxLayout.X_AXIS);
        JLabel label = new JLabel(description);
        box.add(label);
        box.add(slider);
        sliderBox.add(box);
    }
 
    public static void main(String[] args)
    {
        new JSliderTest().init();
    }
 
}
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