CODEWITHSUNDEEP
java
Manohar Kulanthai vel
Manohar Kulanthai vel

Reputation: 581

How to compile and execute java using jar in cmd?

I created one java file then i converted into jar now i want to use it in another java class how to import that jar and how to compile and execute.

Upvotes: 1

Views: 16339

Answers (3)

aioobe
aioobe

Reputation: 421020

Given a "library" class pkg/LibClass.java:

package pkg;

public class LibClass {
    public static void sayHello() {
        System.out.println("Hello world");
    }
}

Compile and create a jar file:

$ javac pkg/LibClass.java 
$ jar cvf lib.jar pkg/LibClass.class
added manifest
adding: pkg/LibClass.class(in = 404) (out= 284)(deflated 29%)

(creates a lib.jar in the current directory)

Create an application that uses the library:

import pkg.LibClass;

public class MainClass {
    public static void main(String[] args) {
        LibClass.sayHello();
    }
}

Compile and run the application using lib.jar:

$ javac -cp lib.jar MainClass.java 
$ java -cp lib.jar:. MainClass

Upvotes: 5

Jayendra
Jayendra

Reputation: 52779

Set the jar in your class path or pass as an argument and compile or execute -

Compile - javac -classpath your.jar other.java

Execute - java -classpath your.jar other

Upvotes: 0

Jigar Joshi
Jigar Joshi

Reputation: 240898

You need to make that jar file available in classpath at compile time and runtime when that another java file is being compiled/executing

Upvotes: 0

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