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using another .java main function #1692
Description
I have the following file structure
.
├── README.md
├── lib
└── src
├── App.java
└── MainProgram.java
App.java
public class App {
public static void main(String[] args) {
System.out.println("Hello, World!");
}
}MainProgram
class MainProgram {
public static void main(String[] argv){
App.main(argv);
}
}i try this in the command line at src/directory
java MainProgram.java
it is the result
~/Documents/SW_assignment/assignment/src » java MainProgram.java
MainProgram.java:4: error: cannot find symbol
App.main(argv);
^
symbol: variable App
location: class MainProgram
1 error
error: compilation failed
How to print out Hello world! ? Thank you.
Activity
fbricon commentedon Nov 5, 2020
If you're trying to run your code from a terminal, you need to compile all the classes in the terminal too, using the
javaccompiler:That will generate the .class files in the same directory, you can then execute:
When in vscode, the compilation happens behind the scene, the class files are hidden from you. You need to install the Java Debugger to run your code. Then simply click on the Run or Debug link over the main method: https://youtu.be/o4BTKD3iyYE?t=45
fbricon commentedon Nov 5, 2020
With recent JDKs, calling
java MainProgram.javaworks fine to compile and execute single files in one command. It just doesn't also compile dependent files as well (that I know of)fdq09eca commentedon Nov 5, 2020
true,
java App.javaworks fine. extra question: any hotkey for the java run or debug?testforstephen commentedon Nov 6, 2020
F5-> debugCtrl + F5-> runIt will run the Java file in the current active editor.