how to add an event to my slider code

Question

How can I add an event to this code such that if i drag the slider, the number is displayed. Please, let me know as I am new to Java..

import javax.swing.*;

public class Slider extends JFrame {

    JSlider pickNum = new JSlider(JSlider.HORIZONTAL, 0, 30, 5);

    public Slider() {
        super("Slider");
        this.pack();
        this.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);

        pickNum.setMajorTickSpacing(10);
        pickNum.setMinorTickSpacing(1);
        pickNum.setPaintTicks(true);
        pickNum.setPaintLabels(true);
        getPointedValue();
        this.add(pickNum);
        this.setVisible(true);
    }

    public final int getPointedValue() {
        int value;
        value = pickNum.getValue();
        return value;
    }

    public static void main(String[] args) {
        Slider frame = new Slider();
        int i;
        i = frame.getPointedValue();
        System.out.println("current value is:" + i);
    }
}

don't use Java reserved words as class names use MySlider instead of Slider, don't extends JFrame because this is direct road to the problems, GUI rellated code in the main void should be wrapped into invokeLater, for more read [Initial Threads](http://docs.oracle.com/javase/tutorial/uiswing/concurrency/initial.html) — mKorbel, Mar 28 '12 at 16:41

Andrew Thompson · Answer 1 · 2012-03-28T16:31:29.417

5

See addChangeListener(ChangeListener), as well as How to Use Sliders & How to Write a Change Listener.

edited Mar 28 '12 at 16:31

answered Mar 28 '12 at 16:25

Andrew Thompson

168,117
40
217
433

1

@henry joseph maybe important, maybe not, you have look at `BoundedRangeModel` and add `ChangeListener` to this model – mKorbel Mar 28 '12 at 17:02

score 3 · Accepted Answer · edited May 23 '17 at 10:32

3

As a concrete example using ChangeListener, SpinSlider shows how to connect a JSlider and a JSpinner.

Spin slider

edited May 23 '17 at 10:32

Community

1
1

answered Mar 28 '12 at 17:54

trashgod

203,806
29
246
1,045

how to add an event to my slider code

2 Answers2