Question

how create java class

Answer 1

Dog.java

public class Dog
{
    private String _name;
    
    public Dog(String name)
    {
        _name = name;
    }
    
    public String GetName() { return _name; }
}

Main.java

public class Main
{
    public static void main(String[] args)
    {
        Dog dog = new Dog("Butch");
        System.out.println("My Dog is called: " + dog.GetName());
    }
}

See this for more details: https://www.w3schools.com/java/java_classes.asp

Answer 2

public class My class{
        private String message;
        public My class(String message){
              this.message= message;
}

          public void display message(){
               System.out.println("Message:"+message);
}
          public static void main(string[] args){
              My class My object=new My class("Hello,World!");
               my object.displayMessage();
    }
}