How to use Java JSlider Example

In this tutorials, I am going to show you how to create Java JSlider and how do we use.

Java JSlider is a swing component that lets the user to select value by sliding a knob with in a bounded interval.

Java JSlider Example :

[java]

package com.onlinetutorialspoint.swing;

import java.awt.BorderLayout;
import java.awt.Color;
import java.awt.Dimension;
import java.awt.Graphics;

import javax.swing.JFrame;
import javax.swing.JPanel;
import javax.swing.JSlider;
import javax.swing.SwingConstants;
import javax.swing.border.Border;
import javax.swing.event.ChangeEvent;
import javax.swing.event.ChangeListener;

class MyRect extends JPanel {
private int diameter = 10;

   public void paintComponent(Graphics g) {
       super.paintComponent(g);
       g.fillRect(10, 10, diameter, diameter);
   }

   public void setDiameter(int diameter) {
       this.diameter = (diameter >= 0 ? diameter : 10);
       repaint();
   }

   public Dimension getDimensions() {
       return new Dimension(200, 200);
   }

   public Dimension getMinDimensions() {
       return getDimensions();
   }
}

public class JSliderDemo extends JFrame{
   private JSlider jSlider;
   private MyRect myRectPanel;
   JSliderDemo(){
       super("JSlider Demo");
       myRectPanel = new MyRect();
       myRectPanel.setBackground(Color.GRAY);
       myRectPanel.setForeground(Color.GREEN);

       jSlider = new JSlider(SwingConstants.HORIZONTAL,0,200,10);
       jSlider.setMajorTickSpacing(10);
       jSlider.setPaintTicks(true);

       jSlider.addChangeListener(new ChangeListener() {

           @Override
           public void stateChanged(ChangeEvent arg0) {
               myRectPanel.setDiameter(jSlider.getValue());
           }
       });

       add(jSlider,BorderLayout.SOUTH);
       add(myRectPanel,BorderLayout.CENTER);
   }
   public static void main(String[] args) {
       JSliderDemo sliderDemo = new JSliderDemo();
       sliderDemo.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
       sliderDemo.setSize(300, 350);
       sliderDemo.setVisible(true);
   }
}

[/java]

setMajorTickSpacing() : This method is used to set the major tick spacing.
setPaintTicks() : It Determines whether tick marks are painted on the slider or not. If it set to true the tick marks will appear on slider.

Output :