新建类名和保存时的类名不同时编译错误提示

D:\myjava>
D:\myjava>javac ten.java

D:\myjava>java ten
Exception in thread "main" java.lang.NoClassDefFoundError: ten
Caused by: java.lang.ClassNotFoundException: ten
        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: ten.  Program will exit.