java - NoClassDefFoundError on Hello World -


i trying run simple program , running errors. made simple helloworld java program, , unable run terminal on mac. have check make sure classpath set properly, , confused why not running.

here program:

public class hello {     public static void main(string[] args) {         system.out.println("hello, world");     } }

here terminal commands:

last login: thu may  2 12:01:50 on ttys000 172-26-125-179:~ rohan$ cd /users/rohan/desktop  172-26-125-179:desktop rohan$ ls hello.java 172-26-125-179:desktop rohan$ echo $classpath  172-26-125-179:desktop rohan$ export classpath=/users/rohan/desktop 172-26-125-179:desktop rohan$ echo $classpath /users/rohan/desktop 172-26-125-179:desktop rohan$ java hello.java exception in thread "main" java.lang.noclassdeffounderror: hello/java caused by: java.lang.classnotfoundexception: hello.java     @ java.net.urlclassloader$1.run(urlclassloader.java:202)     @ java.security.accesscontroller.doprivileged(native method)     @ java.net.urlclassloader.findclass(urlclassloader.java:190)     @ java.lang.classloader.loadclass(classloader.java:306)     @ sun.misc.launcher$appclassloader.loadclass(launcher.java:301)     @ java.lang.classloader.loadclass(classloader.java:247) 172-26-125-179:desktop rohan$

any thoughts appreciated! update ignore prior case, better view of problem:

last login: thu may  2 13:05:17 on ttys000 172-26-125-179:~ rohan$ cd /users/rohan/dropbox/current/ds/lab6  172-26-125-179:lab6 rohan$ ls hello.java 172-26-125-179:lab6 rohan$ cat hello.java public class hello {     public static void main(string[] args) {         system.out.println("hi");     } } 172-26-125-179:lab6 rohan$ echo $classpath  172-26-125-179:lab6 rohan$ export classpath=/users/rohan/dropbox/current/ds/lab6  172-26-125-179:lab6 rohan$ echo $classpath /users/rohan/dropbox/current/ds/lab6 172-26-125-179:lab6 rohan$ javac hello.java 172-26-125-179:lab6 rohan$ java hello.class exception in thread "main" java.lang.noclassdeffounderror: hello/class caused by: java.lang.classnotfoundexception: hello.class     @ java.net.urlclassloader$1.run(urlclassloader.java:202)     @ java.security.accesscontroller.doprivileged(native method)     @ java.net.urlclassloader.findclass(urlclassloader.java:190)     @ java.lang.classloader.loadclass(classloader.java:306)     @ sun.misc.launcher$appclassloader.loadclass(launcher.java:301)     @ java.lang.classloader.loadclass(classloader.java:247) 172-26-125-179:lab6 rohan$

try:

$ javac hello.java

$ java hello


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