How do you use JOptionPane showInputDialog?
How do you use JOptionPane showInputDialog?
Show a dialog asking the user to type in a String: String inputValue = JOptionPane. showInputDialog(“Please input a value”);…Class JOptionPane.
| Method Name | Description |
|---|---|
| showConfirmDialog | Asks a confirming question, like yes/no/cancel. |
| showInputDialog | Prompt for some input. |
How do you make JOptionPane?
Java JOptionPane Example: showInputDialog()
- import javax.swing.*;
- public class OptionPaneExample {
- JFrame f;
- OptionPaneExample(){
- f=new JFrame();
- String name=JOptionPane.showInputDialog(f,”Enter Name”);
- }
- public static void main(String[] args) {
What does JOptionPane mean?
JOptionPane is a class library that makes it easy to pop up a simple dialog box that either provides an information message or asks for a simple input from the user. While the class has a lot of methods, most uses of this class are through a few static methods.
What package must be imported to work with class JOptionPane?
javax.swing package
For example, to import the JOptionPane class from the javax. swing package, we can use the following import statement: import javax. swing.
What does JOptionPane showInputDialog return?
JOptionPane. showInputDialog() will return the string the user has entered if the user hits ok, and returns null otherwise. Therefore, you can just check to see if the resultant string is null .
Why do we use null in JOptionPane?
Passing null to it just indicates that there’s not an associated “parent” dialog – ie, the dialog being displayed does not belong to another dialog.
What is the JOptionPane class?
The class JOptionPane is a component which provides standard methods to pop up a standard dialog box for a value or informs the user of something.
How do I import Joptionpane into eclipse?
1 Answer
- Make sure you have a JDK installed and selected in eclipse Window > Preferences > Java > Installed JREs.
- Make sure it’s in your build path Project > Properties > Java Build Path > Libraries.
- Your project should be a Java project Project > Properties > Builders.
Why can’t I import Java Swing?
You have likely selected an execution environment that doesn’t support Swing. Right click your project and select Properties. In the Properties dialog select Java Build Path. Go to the Libraries tab and select the JRE System Library entry.
What library or package includes the JOptionPane class?
JOptionPane; This tells java that we want to use the JOptionPane class, located in the javax. swing library.
