I'm a beginner in Java and I created this class:
class test
{
public static void main(String[] args)
{
System.out.println("Hello World!");
}
}
as test.java, and when I compiled it with this cmd:
javac C:\Users\Aimad\Desktop\test.java
and then:
java C:\Users\Aimad\Desktop\test.class
I received this error :
Could not find or load main class C:\Users\Aimad\Desktop\test.class
The problem with what you have written is that you have added ".class". By writing this you have instructed Java.exe to look for a class file called "class" in a directory called "test" underneath the one you are currently in. To make you code work remove the ".class" extension and you need to navigate to the file in the command line first. Additionally, the class that holds your main method must be declared as "public".
Code
public class test
{
public static void main(String[] args)
{
System.out.println("Hello World!");
}
}
Command Line
cd C:\Users\Aimad\Desktop
java test
java.util.HashMap is the fully-qualified name of a class called HashMap in the package java.util. When you invoke Java, you're not giving a filename but a classname, it already knows to add .class on the end of whatever you ask for.
java command expects a class name, not a path or file name. What you write under "Command Line" is wrong.Try ths::
java C:\Users\Aimad\Desktop\test
The solution is either:
% cd C:\Users\Aimad\Desktop
% java test
or
% java -cp C:\Users\Aimad\Desktop test
Explanation:
The argument to the java command must be the fully qualified name of the class. In your case, since your class is declared in the "default" package, the FQN is "test".
The java command needs to be able the class (i.e. the "test.class" file) via its classpath. The default java classpath is . so the first solution is to change to the directory containing the "test.class" file and so that it can be accessed as ".\test.class". The second solution uses the -cp argument to specify a non-default classpath.
Note that using a pathname to identify the class won't work, either with the ".class" suffix, or with the ".class" suffix removed ... (except as above)
Go to the directory where you .class file is and type the command to run your program.
For execution, You need not to write java C:\Users\Aimad\Desktop\test.class
.class files is for machine readable so we need not to call them.
simply add the public class name only such as java C:\Users\Aimad\Desktop\test
read here
$cd C:\Users\Aimad\Desktop $java -cp . test
and make class as public
while running the program no need to specify .class and the path it should be fully qualified class name :)
java expects a fully qualified class name, not a path name.
java -cp . testor use an IDE ;)java -cp C:\Users\Aimad\Desktop testIt's much simpler when you run from the directory where you code is. ;)cd Users\Aimad\Desktopand after that just usejava testthats it.