how to run java project with java programm code example

Example 1: java run project from command line

// Assuming that you have an executable jar
java -jar myJavaProject.jar

// Assuming that you have packaged jar
java -jar target/myJavaProject.jar

Example 2: how to start a java program

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