Linux using a method from a jar file (Java Code)

Question

I am trying to write a program that prints out a statement through Linux. The catch is that most of the statement must come from a method from a jar file. Basically. my code looks like this

public class identification {
     public static void main(String[] args){ // Main method with print statement
          System.out.print("I am " + person()); 
    } 
}

The person() method comes from the jar file. It should give something like "I am bob on a computer," but I can't quite figure out how to set up the CLASSPATH environment variable in the .bash_profile so it reads the method from the jar file. Any ideas? I am sure this is a simple task.

Thank you for your time.

Class names should start with a capital letter -> Identification — dosw
– dosw, Commented Jun 12, 2015 at 8:12

nafas · Accepted Answer · 2015-06-12 08:08:12Z

1

use cp command to add a jar file

java -cp lib/myJar.jar myPackage.Program

also I believe you may need to import class where method person is in. I don't know how your hierarchy is so I can't help you with that.

answered Jun 12, 2015 at 8:08

nafas

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2 Comments

Adriaan Koster Over a year ago

If person() is static then you can use: import ClassFromJar; and ClassFromJar.person(). If it is non static you need the same import and do ClassFromJar instance = new ClassFromJar(...); and instance.person().

Equinoxinator Over a year ago

Is the myPackage.Program the name of the jar plus the name of the program that is going to run?

dosw · Accepted Answer · 2015-06-12 08:09:44Z

0

You can add a jar to your classpath like this:

export CLASSPATH=$CLASSPATH:/path/to/your/myJar.jar

answered Jun 12, 2015 at 8:09

dosw

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1 Comment

Adriaan Koster Over a year ago

Note that this will set a global classpath which might be used by other Java applications. Not a good idea.

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