HelloWorld can not find or load main class

Error Description:
cmd command

java HelloWorld
Can not find or load main class HelloWorld

java-passclass HelloWorld
Unrecognize option:-passclass HelloWorld
error: could not creat the Java Virtual Machine

here exclude the alphabet , I is NETBEANS series, compiles and runs without problems

environment configuration :
CLASSPATH:.;% JAVA_HOME% \ lib;% JAVA_HOME% \ lib \ dt.jar;% JAVA_HOME% \ lib \ tools.jar
JAVA_HOME: D: \ java jdk1.7.3
Path:% JAVA_HOME% \ bin;% JAVA_HOME% \ jre \ bin
After the test no problem ah ! ! !

compiled files with NETBEANS is on the E drive , tangled for a long time , did not understand ! ! Pursuing big God
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compile time java HelloWord.java

Since you should be compiled to run javac HelloWord
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If you want to compile the file . java files . To set up your computer and then show the suffix .
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still have problems ah classpath set your location HelloWorld.class not give ah

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do not put jdk installed in directories with spaces
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directory is best not to have spaces , especially in a variety of professional software , the best independent build a specialized storage folders , otherwise there may be unexpected problems .
landlord of the problem I was reloaded into a directory without spaces resolved
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% JAVA_HOME% \ lib \ dt.jar; into

;% JAVA_HOME% \ lib \ rt.jar;.;

try. . .
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program has MAIN function do ?

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put your source code stickers, real name HelloWorld class do ? I 'm learning , but also committed such a mistake Caesar

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first cut to the package name compile and run
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which were entered in the cmd java, javac see if there is not a lot of things out , yes , that you the configuration is successful, you configure the best route to go copy
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cmd
E: \ java \ HelloWorld \ src \ helloworld> javac HelloWorld.java
E: \ java \ HelloWorld \ src \ helloworld> java HelloWorld

fainted ! ! !

changed :

cmd
E: \ java \ HelloWorld \ src> javac-d. helloworld / HelloWorld.java
E: \ java \ HelloWorld \ src> java helloworld.HelloWorld
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tried it , still the same problem
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amount , sorry remember it

above reply was wrong , you just java E :/ / HelloWorld
Try it
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the same ah. . . To the point of principle it
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still the same, the internet has , ah, tried, useless
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E: \ java \ HelloWorld \ src \ helloworld> java HelloWorld
Exception in the thread "main" java.lang.NoClassDeFoundError: HelloWorld
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my program are placed in E: \ java inside,
Then I set this right classpath : CLASSPATH:.;% JAVA_HOME% \ lib;% JAVA_HOME% \ lib \ dt.jar;% JAVA_HOME% \ lib \ tools.jar; E: \ java
this way re- tried again
E: \> java HelloWorld

java HelloWorld
Can not find or load main class HelloWorld

E: \> java-passclass HelloWorld
Unrecognize option:-passclass HelloWorld
error: could not creat the Java Virtual Machine

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directory can not contain spaces. . . That I have to re- install or directly change directory ah. . Is this you ? Others directories with spaces can
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miserable . . . . Reloading . . . Works great ah. . .
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14 floor of my dear friend . . . . Not ah
Exception in the thread "main" java.lang.NoClassDeFoundError: HelloWorld
Today reload

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re-installed
path into D: \ java \ jdk1.7.3
JAVA_HOME: D: \ java \ jdk1.7.3
environment variable settings test is successful, you can display the version 1.73
E: \> javac HelloWorld.java no problem
E: \> java HelloWorld on error
Exception in the thread "main" java.lang.NoClassDeFoundError: HelloWorld
challenge patience ah. . . .
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/ *
* To change this template, choose Tools | Templates
* and open the template in the editor.
* /
package helloworld;

/ **
*
* @ author Administrator
* /
public class HelloWorld {

/ **
* @ param args the command line arguments
* /
public static void main (String [] args) {
System.out.println ("HelloWorld");
}
}

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it in the package , using NETBEANS run a successful
cmd
E: \ java \ HelloWorld \ src \ helloworld> javac HelloWorld.java
E: \ java \ HelloWorld \ src \ helloworld> java HelloWorld
Exception in the thread "main" java.lang.NoClassDeFoundError: HelloWorld
........
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even versions are out. Dude
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24 Floor, Department of positive Solutions ah. . . . What does this have to learn ? dos operating system ? Thank you ! ! !
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-d. Why do we need this, it
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your answer to the question should be in here
http://blog.jrj.com.cn/2797406448, 5365872a.html
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Note : CLASSPATH values ​​finally did ; ( semicolon ) the following error occurs
Error: Can not find or load main class HelloWorld.
engage in an afternoon, that is the problem. . . .
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I encounter is the 28 # issue mentioned in the CLASSPATH semicolon followed by a later , there is no problem.
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28 House said it right , I tried
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less a semicolon Why not?
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If you add a system variable classpath ; semicolon or not words. Another reason is that there less variable in the user classpath variable .
Users only need to create a classpath variable on the same variables on the system classpath variable value is copied to the user on the classpath variable can be friends .
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If you add a system variable classpath ; semicolon or not words. Another reason is that there less variable in the user classpath variable .
Users only need to create a classpath variable on the same variables on the system classpath variable value is copied to the user on the classpath variable can be friends .
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28 F, positive solution, which if it does not know how to engage in nor wow
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I was so
with class suffix not, but OK without
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this problem that white is the format of java compiler command :

javac e: \ Example.java / / Here javac command to compile the class file , followed by the java file 's full name, including the directory and file name.
cd e: \
java Example / / Here java class files to run the command , followed by the main class name , which is the main function of the class containing the name of the class name and the file name to unity .

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not find the class, explain the problem lies in the classpath. As long as the command line, enter : set classpath =% classpath%;.
add the current path ( one point ) to the classpath on ok.
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37 Floor practical.