2 Ways to Create a JSpinner - Swing

Screenshot of JSpinner Example
Here are 2 ways to create a JSpinner. Before, we do let us talk a bit about the JSpinner. Out of all the swing components, JSpinner is the most easiest one to create. Yes, you heard it right. This component might be a bit unfamiliar however, its advantages are many. Let us look at the two constructors of the class and its methods.

Constructors


// Creates a spinner containing numbers (of SpinnerNumberModel as model) with no minimum/maximum limits
JSpinner()

// Creates a spinner with given model where we can set maximum,minimum,step size, type of data
JSpinner(SpinnerModel m)

Methods


public void setValue(int val) // Sets current value to spinner
public int getValue() // Gets the current value

public int getNextValue() // Gets next value
public int getPreviousValue() // Gets previous value

public void setModel(SpinnerModel m) // Sets a model for the JSpinner
public SpinnerModel getModel() // Gets model object of JSpinner


import javax.swing.*;
import java.awt.*;
class JSpinnerExample extends JFrame
{
JSpinner s1,s2;
// A number model with value of 8, minimum 2, maximum 100 and step size 2
SpinnerNumberModel m=new SpinnerNumberModel(8,2,100,2);

    public JSpinnerExample()
    {
        createAndShowGUI();
    }
   
    private void createAndShowGUI()
    {
        setTitle("JSpinner Example");
        setDefaultCloseOperation(EXIT_ON_CLOSE);
        setLayout(new FlowLayout());
       
        s1=new JSpinner();
        s2=new JSpinner(m);
       
        //s1.setValue(10);
       
        System.out.println("Value in s1 "+s1.getValue());
        System.out.println("Next value in s1 "+s1.getNextValue());
        System.out.println("Previous value in s1 "+s1.getPreviousValue());
       
        SpinnerNumberModel n=(SpinnerNumberModel)s1.getModel();
        System.out.println(n.getMinimum());
        System.out.println(n.getMaximum());
        System.out.println(n.getStepSize());
       
        add(s1);
        add(s2);
       
        setSize(400,400);
        setVisible(true);
    }
   
    public static void main(String args[])
    {
        new JSpinnerExample();
    }
}

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Tags: Swing Components,