I tried to run my basic HelloWorld.class file from my terminal.
I use the following input:
Java HelloWorld.class
But it says:
Error: Could not find or load "HelloWorld.class"
I have tried giving it a directory but it doesn't work.
6 Answers
because you didn't compiled or run it successufully.you should use
javac HelloWorld.java
to complile and
then use
java HelloWorld
to run it. plz check this tutorial http://introcs.cs.princeton.edu/java/11hello/
answered Jul 30, 2014 at 4:10
Madhawa Priyashantha
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Comments
The class should be (Executable Class should definitely contain the main method with same declaration as below)
Class MyClassName
{
// Methods here
public static void main (String args[])
{
// Code here
}
}
To Compile, it should be:
javac MyClassName.java
On successful compilation, MyClassName.class would be generated in your folder.
To run, it should be
java MyClassName
In case your java is in say D:/JavaWorkDir/src, You need to compile and run from the folder D:/JavaWorkDir/src. Also Ensure that your classpath is set appropiately.
Comments
You don't run it as
java HelloWorld.class
but
java HelloWorld
There is no need of .class extension.
But note you always have to use fully qualified name. So if your class resides in some package say myPackage then you need to run
java myPackage.HelloWorld
Comments
You are receiving this error because you shouldn't include the .class when you run the compiled file.
After you've compiled:
javac HelloWorld.java
run using:
java HelloWorld
(don't do: java HelloWorld.class)
Comments
Run it as Java HelloWorld and not like Java HelloWorld.class.
The error Error: Could not find or load "HelloWorld.class" is occuring because:
- The class may have not compiled correctly.
- The compiled class is not available on the path from where you are trying to run it.
- Proper classpath is not set for compiling and running the java classes.
Whenever you write a Java Program named HelloWorld, you must compile it as:
javac HelloWorld.java
Once the HelloWorld.class class file generated in the same directory where you have your java file, compiled by the compiler, you can run it from console as:
java HelloWorld
Comments
if u want to try hello world you can also try to run it on the NetBeans application and also on Jdoodle.com
.classextensionHelloWorldlive in a package?