Question

Is there any way that I can call method in other class without constructor in java?

public class Chest {

private String contents;

public String getContents()
   {
       return contents;
   }

public void setContents(String contents)
   {
      
       this.contents = contents;
      
   }

I need to set content and print out in the main method, but it keep gives me a error message when I

try Chest.setContents("Gold"); on main class. I suppose not use Chest chestGet = new Chest(); and also not allowed to change chest method to static.

public class Main
{

   public static void main(String[] args)
   {

Chest.setContents("Gold"); //Error

System.out.println(Chest.getContents()); //Error

}

}

Answer 1

If these 2 restrictions are there than there is no way to execute the given case

as it contents is instance variable even though if you modify the setContent() you can access contents variable in that method untill you made content as static

Other than In Java with out creating Object you can't call the instance variables or you can't assign any value because memeory will be allocated only when the object is created..

As you mentioned you should not use Chest chestGet = new Chest(); This statement is to create object

In reflection we have other ways to create object.. we can use that concept and crate the object and call the setContents();

Example:

String className = "Chest";
Class c = Class.forName(className);
Chest t = (Chest)c.newInstance();

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