4 Ways to Create a JSlider - Swing

Here are 4 simple ways to create a JSlider in Swing. The JSlider class is big, there is no doubt in that. It has got about 6 constructors (here I'll explain 5 of them which I'll list here).

Constructors

JSlider()

JSlider(int orientation)

JSlider(int min,int max)

JSlider(int min,int max,int val)

JSlider(int orientation,int min,int max,int val)

Methods

public void setExtent(int extent) // value+extent is maximum value to which a jslider can be set to. See constraints below.


public void setFont(Font f) // font for labels


public void setInverted(boolean flag) // slide from the inverted direction


public void setLabelTable(Dictionary d) // labels dictionary containing value-label pairs



public void setMajorTickSpacing(int space) // value between big ticks


public void setMinorTickSpacing(int space) // value between small ticks



public void setMinimum(int min) // minimum value for jslider


public void setMaximum(int max) // maximum value for jslider



public void setOrientation(int orientation) // Set orientation horizontal/vertical


public void setSnapToTicks(boolean b) // Auto adjust JSlider to nearest tick when value is changed



public void setPaintLabels(boolean b) // Paint labels


public void setPaintTicks(boolean b) // Paint tick (a tick is a line that corresponds a value) 

Constraints: You need to know the constraints to understand what an extent means.

minimum <= value <= value+extent <= maximum

import javax.swing.*;
import java.awt.*;
import java.util.*;
class JSliderExample extends JFrame
{
JSlider s1,s2,s3,s4,s5;
Hashtable<Integer,JLabel> h=new Hashtable<>();
    
    {
    h.put(0,new JLabel("Zero"));
    h.put(10,new JLabel("Ten"));
    h.put(20,new JLabel("Twenty"));
    h.put(30,new JLabel("Thirty"));
    h.put(40,new JLabel("Forty"));
    h.put(50,new JLabel("Fifty"));
    // This is not taken, see down since
    // s4 maximum val is 50
    // h.put(60,new JLabel("Sixty"));
    }

    public JSliderExample()
    {
        createAndShowGUI();
    }
    
    private void createAndShowGUI()
    {
        setTitle("JSlider Example");
        setDefaultCloseOperation(EXIT_ON_CLOSE);
        setLayout(new FlowLayout());
       
        s1=new JSlider();
        // orientation
        s2=new JSlider(SwingConstants.VERTICAL);
        // min,max
        s3=new JSlider(10,90);
        // min,max,val
        s4=new JSlider(0,50,10);
        // orientation, min,max,val
        s5=new JSlider(SwingConstants.HORIZONTAL,0,100,20);
       
        // Set value
        s1.setValue(20);
        s2.setValue(40);
        s3.setValue(20);
       
        // Set minimum,maximum
        s1.setMinimum(10);
        s1.setMaximum(40);
       
        // If you set more than maximum, then
        // maximum is considered, i.e.
        // here setValue(40) is substituted
        s1.setValue(42);
       
        System.out.println("Value of s1 is "+s1.getValue());
       
        // Set orientation
        s4.setOrientation(SwingConstants.VERTICAL);
       
        // Set border
        s1.setBorder(BorderFactory.createLineBorder(Color.GRAY,1,false));
       
        s1.setMinorTickSpacing(5);
        s1.setMajorTickSpacing(10);
        s4.setMajorTickSpacing(10);
        s5.setMinorTickSpacing(5);
        s5.setMajorTickSpacing(10);
       
        // Set paint labels
        s1.setPaintLabels(true);
        s1.setPaintTicks(true);
        s4.setPaintLabels(true);
        s5.setPaintLabels(true);
        s5.setPaintTicks(true);
       
        s1.setSnapToTicks(true);
       
        s1.setFont(new Font("Tahoma",Font.PLAIN,11));
       
        s3.setInverted(true);
       
       
        s4.setLabelTable(h);
       
        // This doesn't work because, in label table, separate
        // JLabel objects are acting as JLabels
        // s4.setFont(new Font("Tahoma",Font.PLAIN,11));
       
       
        // Now though the max is 100, user can
        // drag slider upto 100-20=80 only
        // i.e. (max-setExtent)=max_val
        s5.setExtent(20);
       
        add(s1);
        add(s2);
        add(s3);
        add(s4);
        add(s5);
       
        setSize(600,400);
        setVisible(true);
    }
    
    public static void main(String args[])
    {
        new JSliderExample();
    }
} 

Also see combining JSlider and JMenu and increase JTextArea font size with JSlider

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