I made a sample code to start one project just refactoring another one.
This the refactored one:
package com.sh.st;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.awt.event.KeyEvent;
import java.awt.event.WindowAdapter;
import java.awt.event.WindowEvent;
import java.awt.event.WindowListener;
import javax.swing.ImageIcon;
import javax.swing.JFrame;
import javax.swing.JLabel;
import javax.swing.JMenu;
import javax.swing.JMenuBar;
import javax.swing.JMenuItem;
import javax.swing.SwingConstants;
public class Main extends JFrame implements ActionListener {
/**
*
*/
JMenuBar bar;
JMenu file, register;
JMenuItem close, search;
ImageIcon figure1= new ImageIcon("C:/Users/Victor/Downloads/Untitled.jpg");
//ImageIcon figure2= new ImageIcon("C:/Victor Rocha/carroicon.jpg");
JLabel Ibimagem1,Ibimagem2;
/**
*
*/
public Main()
{
bar= new JMenuBar();
file= new JMenu("file");
register= new JMenu("register");
register.setMnemonic(KeyEvent.VK_R);
file.setMnemonic(KeyEvent.VK_F);
close= new JMenuItem("Close");
close.addActionListener(this);
search= new JMenuItem("Search");
search.addActionListener(this);
Ibimagem1= new JLabel(figure1, JLabel.CENTER);
Ibimagem1.setVerticalTextPosition(SwingConstants.CENTER);
bar.add(file);
bar.add(register);
file.add(close);
register.add(search);
//register.add(carro);
//register.add(cliente);
//register.add(funcionario);
getContentPane().add(Ibimagem1);
setSize(800,600);
setTitle("SHST");
setJMenuBar(bar);
setDefaultCloseOperation(0);
//setIconImage(figure2.getImage());
WindowListener J=new WindowAdapter(){
public void windowClosing(WindowEvent e){
System.exit(0);
}
};
addWindowListener(J);
}
public void actionPerformed(ActionEvent e){
if(e.getSource()==close){
System.exit(0);
}
if(e.getSource()==search){
Search s= new Search();
s.setVisible(true);
}
}
}
This is the original one:
package com.professordelphi.locadora;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.awt.event.KeyEvent;
import java.awt.event.WindowAdapter;
import java.awt.event.WindowEvent;
import java.awt.event.WindowListener;
import javax.swing.ImageIcon;
import javax.swing.JFrame;
import javax.swing.JLabel;
import javax.swing.JMenu;
import javax.swing.JMenuBar;
import javax.swing.JMenuItem;
import javax.swing.SwingConstants;
public class Principal extends JFrame implements ActionListener {
JMenuBar barra;
JMenu arquivo, cadastro;
JMenuItem fechar, cliente, funcionario, carro;
ImageIcon figura1= new ImageIcon("C:/Victor Rocha/carro.jpg");
ImageIcon figura2= new ImageIcon("C:/Victor Rocha/carroicon.jpg");
JLabel Ibimagem1,Ibimagem2;
public Principal()
{
barra= new JMenuBar();
arquivo= new JMenu("Arquivo");
cadastro= new JMenu("Cadastro");
cadastro.setMnemonic(KeyEvent.VK_C);
arquivo.setMnemonic(KeyEvent.VK_A);
fechar= new JMenuItem("Fechar");
fechar.addActionListener(this);
carro= new JMenuItem("Carro");
carro.addActionListener(this);
cliente= new JMenuItem("Cliente");
cliente.addActionListener(this);
funcionario= new JMenuItem("Funcionario");
funcionario.addActionListener(this);
Ibimagem1= new JLabel(figura1, JLabel.CENTER);
Ibimagem1.setVerticalTextPosition(SwingConstants.CENTER);
barra.add(arquivo);
barra.add(cadastro);
arquivo.add(fechar);
cadastro.add(carro);
cadastro.add(cliente);
cadastro.add(funcionario);
getContentPane().add(Ibimagem1);
setSize(800,600);
setTitle("Sistema de Cadastro");
setJMenuBar(barra);
setDefaultCloseOperation(0);
setIconImage(figura2.getImage());
WindowListener J=new WindowAdapter(){
public void windowClosing(WindowEvent e){
System.exit(0);
}
};
addWindowListener(J);
}
public void actionPerformed(ActionEvent e){
if(e.getSource()==fechar){
System.exit(0);
}
if(e.getSource()==carro){
Carro k = new Carro();
k.setVisible(true);
}
if(e.getSource()==cliente){
Cliente c = new Cliente();
c.setVisible(true);
}
if(e.getSource()==funcionario){
Funcionario f= new Funcionario();
f.setVisible(true);
}
}
}
The thing is, the original e building and the refactored is not. The error I receive from the refactored is that "Selection does not contain a main type". I saw a lot of posts regarding this theme but none of them solve my problem. Here is one little list of the things I've tried;
Source: Editor does not contain a main type
- clean your workspace and rebuild your Project.
- make sure you add your source folder in the project properties -> java build path -> source.
- close your project and reopen it.
Trying to run as a Java Application with Eclipse, anyone has suggestions of what should I do?
Best Answer
You dont have a main function defined in the class. The main function is the function that will be called when you run the file.
Try adding
and create and show an object of your JFrame in the main method.