How to compile a class in Java?

Question

Java

package ru.ncedu.java.tasks;

public interface Employee {
  
  int getSalary();
  
  public void increaseSalary(int value);
  
  public String getFirstName(
      String name
      
      );

  public void setFirstName(String firstName);

  public String getLastName();

  public void setLastName(String lastName);

  public String getFullName();

  public void setManager(Employee manager);

  public String getManagerName();

  public Employee getTopManager();
}

Here I have the following code, when I click run, nothing happens:
what should I do to make the code compile?

Answer 1

You need to create a class, for example Main, and create a main method in it:

public class Main{
    public static void main (String[] args){
    // тут код, который будет выполняться
    }
}

And then it can be run as a Java Application.
And you have created an interface.

Answer 2

Look, this is your interface, as you said, create an empty class for a start, then do

public class MainActivity implements НазваниеТвогоИнтерфейса{

after which the methods from your interface can be added to the main class and overridden already (do whatever you want with them).