Eclipse / Jframe-无法启动

Question

When I click on run/debug in eclipse, it gives me this error:

Title:Unable to Launch "The selection cannot be launched and there are no recent launches"

Here is my code:

package jframe1;
import javax.swing.*;
public class jframe1 {
    public static void main(String args){
     JFrame frame = new JFrame();
     JButton button = new JButton("clikity");

     frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);

     frame.getContentPane().add(button);

     frame.setSize(300, 300);
     frame.setVisible(true);
    }
}

It runs fine if I make a command line application, but not when I start using JFrame I cannot run my code/application.

How do I fix this? Where is the problem?

Answer 1

    public static void main(String args){

应该

    public static void main(String[] args){

Answer 2

Eclipse can't find your main function as you have declared it wrongly.
Change .. main(String args) to .. main(String [] args) and it will work!

Code:

import javax.swing.*;

public class jframe1 {

    // It's String[] args
    public static void main(String[] args) {
        JFrame frame = new JFrame();
        JButton button = new JButton("clikity");

        frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);

        frame.getContentPane().add(button);

        frame.setSize(300, 300);
        frame.setVisible(true);
    }
}

Output: