import javax.swing.*;
public class TestProject {
public static void main(String[] args) {
JOptionPane.showMessageDialog(null, "Just about to draw the best piece of artwork in my life, need input please.");
String name= JOptionPane.showInputDialog("Imagine a car, what is it's name?");
JOptionPane.showMessageDialog(null, "Ah okay, so it's name is " + name);
String bodyColour = JOptionPane.showInputDialog("Cool. What colour was the body of the car? \n Blue, Red, Black, Green or Orange? (More to come in DLC's) ");
JOptionPane.showMessageDialog(null, "Mhmm");
String wheelColour= JOptionPane.showInputDialog("Colour of the wheels? ");
JOptionPane.showMessageDialog(null, "Very ordinary...");
String doorColour = JOptionPane.showInputDialog("Last... And probably least, colour of the door?");
JOptionPane.showMessageDialog(null, "Finished the drawing!");
}
}
That is my code above, and I was wondering how the user can press the cancel, (because normally it acts like the user pressed 'ok') or the x button in the pop-up prompt, I imagine it could use some type of listener or perhaps System.exit(0); but I am not sure how to implement it as I'm fairly new to Java
This may solve your problem
if(name == null || (name != null && ("".equals(name))))
{
System.exit(0);// or you can throw exception
}
write this line of code just after your first JOptionPane.showInputDialog()
Your code (just added the above snippet)
import javax.swing.*;
public class TestProject {
public static void main(String[] args) {
JOptionPane.showMessageDialog(null, "Just about to draw the best piece of artwork in my life, need input please.");
String name= JOptionPane.showInputDialog("Imagine a car, what is it's name?");
if(name == null || (name != null && ("".equals(name))))
{
System.exit(0);// or you can throw exception
}
JOptionPane.showMessageDialog(null, "Ah okay, so it's name is " + name);
String bodyColour = JOptionPane.showInputDialog("Cool. What colour was the body of the car? \n Blue, Red, Black, Green or Orange? (More to come in DLC's) ");
JOptionPane.showMessageDialog(null, "Mhmm");
String wheelColour= JOptionPane.showInputDialog("Colour of the wheels? ");
JOptionPane.showMessageDialog(null, "Very ordinary...");
String doorColour = JOptionPane.showInputDialog("Last... And probably least, colour of the door?");
JOptionPane.showMessageDialog(null, "Finished the drawing!");
}
}
如果用户在提示上按“取消”或x按钮,则showInputDialog
将返回null。
Use confirmDialog like this:
int answer = JOptionPane.showConfirmDialog(null, "Your Message", "Your Title", JOptionPane.DEFAULT_OPTION, JOptionPane.INFORMATION_MESSAGE);
if(answer == JOptionPane.CANCEL_OPTION){
System.out.println("canceled");
} else {
System.out.println("OK");
}
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