Limiting
the Values in a Number JSpinner Component
In this section you will learn how to create a Number
JSpinner that can take values up to certain maximum limit. You can even set the
minimum value of the JSpinner component.
In this program, you will see the code for JSpinner
component that holds the numeric value up to certain maximum limit. Following program has used some methods
and APIs are explained as follows:
SpinnerModel:
This is the Interface of the javax.swing.*; package which is
implemented by the SpinnerNumberModel class i.e. used to sequence of
numbers it's constructor specifies the lower and upper bound for JSpinner
contained values.
SpinnerNumberModel():
This is the constructor of the SpinnerNumberModel class which sets the
lower and upper bound for the JSpinner contained values. The constructor takes
four argument as follows:
- First is the default value of JSpinner component.
- Second is the lower bound of JSpinner component.
- Third is the upper bound of JSpinner component.
- Fourth is the steps to increase and decrease the
JSpinner contained value by the specified number.
Here is the code of the program:
import javax.swing.*;
import java.awt.*;
public class LimitValueSpinner{
public static void main(String[] args){
JFrame frame = new JFrame("Limiting value for a JSpinner");
SpinnerModel sm = new SpinnerNumberModel(0, -50, 100, 2);
JSpinner spinner = new JSpinner(sm);
JPanel panel = new JPanel();
panel.add(spinner);
frame.add(panel, BorderLayout.NORTH);
frame.setSize(400, 400);
frame.setVisible(true);
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
}
}
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