I made two projects P1 and P2 in eclipse IDE. P2 depends on P1. I did not create any dependency between P1 and P2. I want to convert P1 to Jar and then make P2 use that Jar.
How do I do this using the commandline ? Is there a commandline inside eclipse which I could use ? If not, I will use the good old commandline.
EDIT - both p1 and p2 have a main method.
OK -
1) Look at this tutorial:
2) Let's assume your entire program consists of one Eclipse project.
To create a .jar file, you'd generally use the Eclipse IDE: Project, <right-click>, Export, Export as .jar file
3) Let's say you want to export the .jar file manually, for whatever reason.
No problem - the tutorial above tells you how. Just:
3a) "cd" to the directory with your .class files
3b) Use Notepad (Windows) or vi (Linux) to create a "manifest.txt" file
EXAMPLE CONTENTS: Main-Class: MyClass
3c) Use "jar" to put the manifest and the .class files into a .jar file:
EXAMPLE: jar cvfm MyClass.jar manifest.txt *.class
4) You can create as many different .jar files from as many different projects as you want this way.
5) You would actually invoke your .jar file(s) as shown in DJ's reply.
Does that help?
What you need is to make sure both P1 & P2 is in the classpath. Typically from command line you execute your program with:
java -cp P1.jar:P2.jar -jar P2.jar
or
java -cp P1.jar:P2.jar x.y.z.MyProg
See the Java Tools documentation on java for more information.
I suggest you find out what you really need to do. You are asking multiple questions dancing around the topic.
I assume that you need to set multiple projects and proper dependencies between them for easy set up and automatic builds.
Look at Maven or Gradle for creating descriptions on how your project is structured, how dependencies look like and how it can be built.
