Salve ragazzi, ho un problema...ho questo programminno per prova:
codice:
import javax.swing.*;
class Tutorial{
 	public static void main(String[] args){
 		int fr = JOptionPane.INFORMATION_MESSAGE;
 		JOptionPane.showMessageDialog(null,
 		"This is the body of the Executable's\nMessage Dialog. ",
 		"Jar to .exe Tutorial",fr);
 		System.exit(0);
 	}
}
compilato attraverso il cmd correttamente ma quando vado ad eseguirlo con java Tutorial mi restituisce la dicitura:
C:\Users\Carlitos\Documenti\TD>java Tutorial
Exception in thread "main" java.lang.UnsupportedClassVersionError: Tutorial : Un supported major.minor version 51.0
at java.lang.ClassLoader.defineClass1(Native Method)
at java.lang.ClassLoader.defineClassCond(Unknown Source)
at java.lang.ClassLoader.defineClass(Unknown Source)
at java.security.SecureClassLoader.defineClass(Unknow n Source)
at java.net.URLClassLoader.defineClass(Unknown Source)
at java.net.URLClassLoader.access$000(Unknown Source)
at java.net.URLClassLoader$1.run(Unknown Source)
at java.security.AccessController.doPrivileged(Native Method
at java.net.URLClassLoader.findClass(Unknown Source)
at java.lang.ClassLoader.loadClass(Unknown Source)
at sun.misc.Launcher$AppClassLoader.loadClass(Unknown Source)
at java.lang.ClassLoader.loadClass(Unknown Source)
Could not find the main class: Tutorial. Program will exit.
Sapete che cosa vuol dire?