JSpinner is a part of javax.swing package. JSpinner contains a single line of input which might be a number or a object from an ordered sequence. The user can manually type in a legal data into the text field of the spinner. The spinner is sometimes preferred because they do not need a drop down list. Spinners contain an upward and a downward arrow to show the previous and the next element when it is pressed.
Constructors of JSpinner are:Â
- JSpinner(): Creates an empty spinner with an initial value set to zero and no constraints.
- JSpinner( SpinnerModel model): Creates a spinner with a specified spinner model passed as an argument.
Commonly used methods are :
- SpinnerListModel(List l): creates a spinner model with elements of list l. This spinner model can be used to set as a model for spinner.
- SpinnerNumberModel(int value, int max, int min, int step): returns a spinner model whose initial value is set to value, with minimum and maximum value, and a definite step value.
- setValue(Object v): sets the value of the spinner to the object passed as argument.
- getValue(): returns the current value of the spinner.
- getPreviousValue(): returns the previous value of the spinner.
- getNextValue(): returns the next value of the spinner.
1. Program to create a simple JSpinner
Java
// java Program to create a// simple JSpinnerimport java.awt.event.*;import javax.swing.*;import java.awt.*;class spinner extends JFrame {    // frame    static JFrame f;Â
    // default constructor    spinner()    {    }Â
    // main class    public static void main(String[] args)    {        // create a new frame        f = new JFrame("spinner");Â
        // create a JSpinner        JSpinner s = new JSpinner();Â
        // set Bounds for spinner        s.setBounds(70, 70, 50, 40);Â
        // set layout for frame        f.setLayout(null);Â
        // add panel to frame        f.add(s);Â
        // set frame size        f.setSize(300, 300);Â
        f.show();    }} |
Output :
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2. Program to create a JSpinner and add ChangeListener to it; Program to select your date of birth using JSpinner.
Java
// Java program to select your// date of birth using JSpinnerimport java.awt.event.*;import javax.swing.*;import java.awt.*;import javax.swing.event.*;class spinner1 extends JFrame implements ChangeListener {    // frame    static JFrame f;Â
    // label    static JLabel l, l1;Â
    // spinner    static JSpinner s, s1, s2;Â
    // default constructor    spinner1()    {    }Â
    // main class    public static void main(String[] args)    {        // create an object of the class        spinner1 sp1 = new spinner1();Â
        // create a new frame        f = new JFrame("spinner");Â
        // create a label        l = new JLabel("select your date of birth");        l1 = new JLabel("1 January 2000");Â
        // create a JSpinner with a minimum, maximum and step value        s = new JSpinner();        s1 = new JSpinner(new SpinnerNumberModel(1, 1, 31, 1));Â
        // setvalue of year        s.setValue(2000);Â
        // store the months        String months[] = { "January", "February", "March",        "April", "May", "June", "July", "August",        "September", "October", "Novemeber", "December" };Â
        // create a JSpinner with list values        s2 = new JSpinner(new SpinnerListModel(months));Â
        // add change listener to spinner        s.addChangeListener(sp1);        s1.addChangeListener(sp1);        s2.addChangeListener(sp1);Â
        // set Bounds for spinner        s.setBounds(70, 70, 50, 40);        s1.setBounds(70, 130, 50, 40);        s2.setBounds(70, 200, 90, 40);Â
        // setbounds for label        l.setBounds(10, 10, 150, 20);        l1.setBounds(10, 300, 150, 20);Â
        // set layout for frame        f.setLayout(null);Â
        // add label        f.add(l);        f.add(l1);        f.add(s);        f.add(s1);        f.add(s2);Â
        // add panel to frame        f.add(s);Â
        // set frame size        f.setSize(400, 400);Â
        f.show();    }Â
    // if the state is changed    public void stateChanged(ChangeEvent e)    {        l1.setText(s1.getValue() + " " + s2.getValue() + " " + s.getValue());    }} |
Output :Â
Note: This program will not run in an online compiler please use an Offline IDE.
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