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();
	}

}