pipeline.txt

Ubuntu Jenkins Pipeline-

sudo apt-get install git
git --version

sudo apt update
sudo apt install openjdk-11-jdk
javac -version

export JAVA_HOME=/usr/lib/jvm/java-11-openjdk-amd64
export PATH=$JAVA_HOME/bin:$PATH

source ~/.bashrc


New Item 
    -> pipeline
            -> click "OK"

Configure
    -> Pipeline
          -> Definition: Pipeline script from SCM
          -> SCM : Git
          -> Github repo
          -> Credentials -> Jenkins -> Username and Pswd
          -> Branch : */main
          -> Script path : jenkins.txt
    -> SAVE


To be uploaded in Github repo:

Test.java :

class Test {
    public static void main(String[] args) {
        System.out.println("Hello World!!");
    }
}

jenkins.txt :

pipeline {
  agent any
  stages {
    stage('version') {
      steps {
	echo 'Stage Version'
        
      }
    }
    stage('hello') {
      steps {
	echo 'Stage Hello'
        sh 'javac Test.java'
	sh 'java Test'
      }
    }
  }
}