All My Plugins Have The Same Error Please Help

This is the error i get and i get all the same plugins i make this recently started happening:
7:57:26 PM [SEVERE] Could not load 'plugins\Welcome+.jar' in folder 'plugins'
7:57:26 PM at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method) ~[?:1.8.0_65]
7:57:26 PM at sun.reflect.NativeConstructorAccessorImpl.newInstance(Unknown Source) ~[?:1.8.0_65]
7:57:26 PM at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(Unknown Source) ~[?:1.8.0_65]
7:57:26 PM ... 14 more

My main class:

package me.deaven;

import org.bukkit.plugin.java.JavaPlugin;

public class main extends JavaPlugin {

public void onEnable() {
getServer().getPluginManager().registerEvents(new LoginListener(), this);
}
}

this is my Listener Class:

package me.deaven;

import org.bukkit.Bukkit;
import org.bukkit.ChatColor;
import org.bukkit.event.EventHandler;
import org.bukkit.event.Listener;
import org.bukkit.event.player.PlayerJoinEvent;

public class LoginListener implements Listener {
@EventHandler
public void onJoin(PlayerJoinEvent e) {
if(!(e.getPlayer().hasPlayedBefore()));
Bukkit.broadcastMessage(ChatColor.DARK_AQUA + "Welcome " + ChatColor.AQUA + e.getPlayer() + ChatColor.DARK_AQUA + "To The " + ChatColor.RED + "Vertigo Network" );
}

}

 

http://pastebin.com/pwe14qvh

 

@Deaven You are putting a semicolon after the if. Please look at the Java tutorials before doing Bukkit

 

@Deaven
Could you post the contents of the <server directory>/logs/latest.log, after a restart?

@bwfcwalshy
Is true and valid, but doesn't explain the errors with loading 3 plugins:

Code:

11:20:21 PM [SEVERE] Could not load 'plugins\Welcome+.jar' in folder 'plugins'
11:20:21 PM     at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method) ~[?:1.8.0_65]
11:20:21 PM     at sun.reflect.NativeConstructorAccessorImpl.newInstance(Unknown Source) ~[?:1.8.0_65]
11:20:21 PM     at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(Unknown Source) ~[?:1.8.0_65]
11:20:21 PM     ... 14 more
11:20:21 PM     at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method) ~[?:1.8.0_65]
11:20:21 PM     at sun.reflect.NativeConstructorAccessorImpl.newInstance(Unknown Source) ~[?:1.8.0_65]
11:20:21 PM     at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(Unknown Source) ~[?:1.8.0_65]
11:20:21 PM     ... 14 more

 

@I Al Istannen
Are there any errors in your IDE? Are you sure your plugin.yml is correct? Have you tried debugging? If so, at what point does your plugin stop working?

 

@Zombie_Striker
Not quite sure what you want from me there


@Deaven
Look at the post from Zombie_Striker, I think it was meant for you. But posting the whole error (from the log file) would be nice too.

 

I Have Got Working Thank you Anyone that Has tried to help me i appreciate it

 

@Deaven
Mark this thread as solved if your problem has been solved.