Problem with hello world.

[gyijhbk]

class HelloWorldApp {
    public static void main(String[] args) {
        System.out.println("Hello World!"); // Display the string.
    }
}

When I try to type java helloworldapp.class i get this error Error: Could not find or load main class.

[Vampiricx3]

When using command line to compile/run Java source code, it must be done as so.

javac (FILENAME).java
java (FILENAME)

You don't need to type .class after you call the java command.

[DarrylBurke]

Lesson: The "Hello World!" Application (The Java™ Tutorials > Getting Started)
Lesson: Common Problems (and Their Solutions) (The Java™ Tutorials > Getting Started)

db

[gyijhbk]

I did so that all *. Class files to run with java but still i get this error.

[christopherx]

you aren't compiling or running the class file. You're compiling then running a java file.

[gyijhbk]

I know .

[gyijhbk]

Now I have another problem - the command java works but other javac command does not work.

[Vampiricx3]

when using javac, you must do it as *.java. so as another example, I would compile my employee system like this.

javac Employee.java
java Employee