package jk;

public class HelloWorld {
	public static void main(String[] args) {
		System.out.println("HelloWorld");
		System.out.println("Welcome to Jenkins");
		// TestClass t = new TestClass();
		// System.out.println(t.value.charAt(0));
	}
}
//
// class TestClass {
// 	String value;
// }

package jk;

public class HelloWorld {
	public static void main(String[] args) {
		System.out.println("HelloWorld, Welcome to Jenkins");
	}
}

Add demo file02