Java Development Tools

Development Tools -> General Questions:

I am trying to figure out how to put utility classes into JAR files and then compile and run applications against those JAR files using the command-line javac, jar, and java tools. I am using jdk1.7.0_17 on Debian GNU/Linux 6.0.7.

I have posted a simple example with one utility class, one console application class, and a Makefile:

http://holgerdanske.com/users/dpchrist/java/examples/jar-20130520-2134.tar.gz

Here is a console session:

2013-05-20 21:39:01 dpchrist@desktop ~/sandbox/java/jar
$ cat src/com/example/util/Hello.java 
package com.example.util;
public class Hello {
    public static void hello(String arg) {
	System.out.println("hello, " + arg);
    }
}

2013-05-20 21:39:12 dpchrist@desktop ~/sandbox/java/jar
$ cat src/com/example/hello/HelloConsole.java 
package com.example.hello;
import static com.example.util.Hello.hello;
public class HelloConsole {
    public static void main(String [] args) {
	hello("world!");
    }
}

2013-05-20 21:39:21 dpchrist@desktop ~/sandbox/java/jar
$ make
rm -f hello
find . -name '*.class' -delete
javac src/com/example/util/Hello.java
javac -cp src src/com/example/hello/HelloConsole.java
echo "java -cp src com.example.hello.HelloConsole" > hello
chmod +x hello

2013-05-20 21:39:28 dpchrist@desktop ~/sandbox/java/jar
$ ./hello
hello, world!

I believe I am looking for:

1. Command-line invocation of "jar" to put the utility class bytecode file (Hello.class) into a JAR?

2. Command-line invocation of "javac" to compile the application (HelloConsole.java) against the JAR file?

3. Command-line invocation of "java" to run the application (HelloConsole.class) against the JAR file?

I already know how t compile the utility class file.

Any suggestions?

TIA,

David