Jar file not displaying (closes too fast)

Question

Whenever I double click a .JAR file OR run it from the console (cmd) it appears briefly for a split second and then disappears.

I have written a very basic program, with a GUI, and I was hoping to see it displayed. How do I make the JAR file visible for myself?

Answer 1

try this it may help you :

import java.awt.Dimension;
import java.awt.FlowLayout;
import javax.swing.JFrame;
import javax.swing.JLabel;
import javax.swing.JTextField;

public class Stackkkk {
    public static void main(String[] args) {
        JFrame frame =new JFrame();
        frame.setSize(500, 200);
        frame.setLayout(new FlowLayout());
        frame.add(new JLabel("Name"));
        JTextField textfield=new JTextField();
        textfield.setPreferredSize(new Dimension(100, 50));
        frame.add(textfield);
        frame.show();
        //to stop the the program when jframe is closed 
        frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
    }

}

create a jar file

Answer 2

Run the .jar file from the command line, using:

java -jar path/to/your/File.jar

By doing this, the window won't close after the application finishes executing so you can see any errors.