compiling packages with javac using appropriate directory structure

[Rob Sweeny]

Hi All,

I am trying to set up a meaningful directury structure to house my source and class files
and finally use javac to compile my .java files into class files.

As a noob I'm having problems doing so.

javac can't find my main class GreetingsUniverse.java

This is what I have so far:

C:\java\classes\com\scjaexam\tutorial\planets
C:\java\src\com\scjaexam\tutorial\planets

C:\java\src\com\scjaexam\tutorial\GreetingsUniverse.java

package com.scjaexam.tutorial;

import com.scjaexam.tutorial.planets.Earth;
import com.scjaexam.tutorial.planets.Mars;
import com.scjaexam.tutorial.planets.Venus;

public class GreetingsUniverse {
	public static void main(String[] args) {
		System.out.println("Greetings, Universe!");
		Earth e = new Earth();
		Mars m = new Mars();
		Venus v = new Venus();

	}
}   

C:\java\src\com\scjaexam\tutorial\planets\Earth.java

package com.sjcaexam.tutorial.planets;

public class Earth {
	public Earth() {
		System.out.println("Hello from Earth");
	}
}

c:\java>javac -classpath classes -sourcepath src GrettingsUniverse.java
javac: file not found: GrettingsUniverse.java

c:\java>javac -classpath classes -sourcepath c:\src GrettingsUniverse.java
javac: file not found: GrettingsUniverse.java

c:\java>javac -classpath classes -sourcepath "c:\src" GrettingsUniverse.java
javac: file not found: GrettingsUniverse.java

c:\java>javac -classpath classes -sourcepath "C:\java\src\com\scjaexam\tutorial" GrettingsUniverse.java
javac: file not found: GrettingsUniverse.java


I was able to compile and interpret the code successfully when all files where in the same dir without using the package or imports statements.

[Matt Jarchow]

The command you are looking for is:

javac -classpath classes -sourcepath src -d classes src\com\scjaexam\tutorial\GreetingsUniverse.java

You need to specify the full path of the file being compiled.

The -d argument is necessary for the compiler to know where to place your class files. If you leave that out, your .class files will be placed in the "src" heirarchy.