This was the error message when I tried running the command "java -cp . Test"

Exception in thread "main" java.lang.UnsupportedClassVersionError: Test : Unsupported major.minor version 51.0
at java.lang.ClassLoader.defineClass1(Native Method)
at java.lang.ClassLoader.defineClass(ClassLoader.java :634)
at java.security.SecureClassLoader.defineClass(Secure ClassLoader.java:142)
at java.net.URLClassLoader.defineClass(URLClassLoader .java:277)
at java.net.URLClassLoader.access$000(URLClassLoader. java:73)
at java.net.URLClassLoader$1.run(URLClassLoader.java: 212)
at java.security.AccessController.doPrivileged(Native Method)
at java.net.URLClassLoader.findClass(URLClassLoader.j ava:205)
at java.lang.ClassLoader.loadClass(ClassLoader.java:3 21)
at sun.misc.Launcher$AppClassLoader.loadClass(Launche r.java:294)
at java.lang.ClassLoader.loadClass(ClassLoader.java:2 66)
Could not find the main class: Test. Program will exit.

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Note that I compiled using this command "javac Test.java"
Was the compiling command wrong? because I could run the program from class file produced by eclipse.

This is the content of Test.java:

import javax.swing.JOptionPane;

public class Test {
public static void main(String [] args) {
System.out.println("Hello World!");
JOptionPane.showMessageDialog(null,"Hello World!!!");
}
}