[FIXED] How to link two classes in Java without functions

Issue

In Eclipse I've created a (Project > Package > Classes(HelloWorld.java, HelloUniverse.java )

How do I connect the second class to the main function,

package com.shindeaditya.first;

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

}

package com.shindeaditya.first;

public class HelloUniverse {
    public void helloUniverse() {
        System.out.println("Hello everyone I'm new to JAVA");
    }

}

So that I get the output as

Hello World
Hello everyone I'm new to JAVA

Solution

There are two ways to solve this:

1: Change the function so it becomes the constructor, Remove the void and make the first letter a capital letter like the class name. Source: https://www.w3schools.com/java/java_constructors.asp

package com.shindeaditya.first;

public class HelloUniverse {
    public HelloUniverse() {
        System.out.println("Hello everyone I'm new to JAVA");
    }
}

2: Call the function on the object, by saving it (for example) to an object and calling the function method. Source: https://www.w3schools.com/java/java_class_methods.asp

package com.shindeaditya.first;

public class HelloWorld {
    public static void main(String args [])
    {
        System.out.println("Hello World");
        
        // with a seperate variable
        HelloUniverse universe = new HelloUniverse();
        universe.helloUniverse();
        
        // in one line
        (new HelloUniverse()).helloUniverse();
    }
}

Answered By - NLxDoDge
Answer Checked By - Mary Flores (JavaFixing Volunteer)