JOptionPane Component in Java

Submitted by donbermoy on Monday, November 24, 2014 - 13:35.

This is a tutorial in which we will going to create a program that will have a JOptionPane Component in Java. A JOptionPane lets the program pop up a dialog box that will let the user informs something. So, now let's start this tutorial! 1. Open JCreator or NetBeans and make a java program with a file name of jOptionPaneComponent.java. 2. Import the javax.swing.* package to access the JOptionPane class.

import javax.swing.*; //used to access the JOptionPane class

3. Initialize your variable in your Main, variable num as String.

String num;

Now, we will use the showInputDialog of the JOptionPane to make the variable num as an input dialog. Have this code below:

num = JOptionPane.showInputDialog("Enter an integer:");

4. To convert the variable num as a complete integer, we will use the parse method and have it initialized as a variable.

int parseNum = Integer.parseInt(num);

To show the number that you have inputted, we will use the showMessageDialog method of the JOptionPane. Have this code below:

 JOptionPane.showMessageDialog(null,"You entered " + parseNum  + ".");

Output: output

Here's the full code of this tutorial:

import javax.swing.*; //used to access the JOptionPane class
 
public class jOptionPaneComponent {
  public static void main(String[] args) {
    String num;
    num = JOptionPane.showInputDialog("Enter an integer:");
    
    int parseNum = Integer.parseInt(num);
    JOptionPane.showMessageDialog(null,"You entered " + parseNum  + ".");
  }
}

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