This is a small little tutorial which will explain how to create your own little Java application which have dependencies which are in other JAR files
First create the following directory structure:
java_test
|
|__myapp
| |__src
| | |__ch
| | |__eitchnet
| | |__java
| | |__Main.java
| |__META-INF
| | |__MANIFEST.MF
| |__bin
|
|__mydep
| |__src
| | |__ch
| | |__eitchnet
| | |__helloworld
| | |__HelloWorld.java
| |__bin
|
|__deploy
|__lib
The MANIFEST.MF file has the following content:
Main-Class: ch.eitchnet.java.Main Class-Path: mydep.jar
The Main.java file has the following content:
package ch.eitchnet.java;
import ch.eitchnet.helloworld.HelloWorld;
public class Main {
public static void main(String[] args) {
HelloWorld hw = new HelloWorld();
System.out.println("HelloWorld instances: " + hw.getInstancesCount());
}
}
The HelloWorld.java has the following content:
package ch.eitchnet.helloworld;
public class HelloWorld {
private static int instances;
public HelloWorld() {
System.out.println("Created HelloWorld object");
instances++;
}
public int getInstancesCount() {
return instances;
}
protected void finalize() {
instances--;
}
}
Change your directory to be in the root of our project
Compile the dependency first:
find mydep/src/ -name "*.java" | xargs javac -d mydep/bin/
Should you be using a windows system, then you have compile file by naming each one. See the java help file for more information
Create the jar:
jar cvf ./deploy/mydep.jar -C ./mydep/bin ./
Compile the app:
find myapp/src/ -name "*.java" | xargs javac -classpath ./deploy/*.jar -d myapp/bin/
Should you be using a windows system, then you have compile file by naming each one. See the java help file for more information
Create the jar:
jar cmvf ./myapp/META-INF/MANIFEST.MF ./deploy/myapp.jar -C ./myapp/bin ./
Run the app by specifying everything explicitly:
java -classpath ./deploy/myapp.jar:./deploy/mydep.jar ch.eitchnet.java.Main
Or by running directly allowing the MANIFEST.MF to do its magic:
java -jar ./deploy/myapp.jar
grretings eitch