OCPJP Coding Exercises: Question 1h (Inner Classes)

[John Paterson]

Hi Folks,


Sharing my solution to the coding exercises from the book 'Practice Exams' by Bert Bates and Kathy Sierra. This solution seems fine to me, do correct me if I am wrong or if there would be a better way of coding it. Hope like minded souls would find this post useful. I will be posting my solutions to the other questions as and when I complete them. Thank you.

Question 1.h

Create a class that has a static inner class and a method local inner
class. Make instances of each inner class. Create code that accesses the
inner classes’ members from the outer class. Create code that accesses the
outer class’s members from within the inner classes.

package oneH;

public class FootballTeam {

	//Static inner class.	
	static class Coach
	{
		void go()
		{
			System.out.println("static inner class:go");
		}
	}
	
	private String x = "FootballTeam";

	void doStuff()
	{	 
		
		//Method local inner class.
		class Player
		{
			public void innerClassMethod()
			{
				/*CODE ACCESSING OUTER CLASS MEMBERS ('X') FROM THE INNER CLASS*/
				System.out.println("method local inner class: Value of x in outer is " + x);
			}//Closing inner class method.
			
		}//Closing inner class.
		
		//Instantiating the method local inner class.	
		Player player = new Player();		
		player.innerClassMethod();	
		
		
	}//Closing outer class method.
	
	public static void main(String args[])
	{
		/*CODE ACCESSING INNER CLASS MEMBERS FROM THE OUTER CLASS*/
		
		//Instantiating the static inner class.
		FootballTeam.Coach c = new FootballTeam.Coach();
		c.go();
		
		//Instantiating the outer class and invoking the outerclass's doStuff method which instantiates the method local inner class.
		FootballTeam ft = new FootballTeam();
		ft.doStuff();		
	}
	
}//Closing outer class.

Result:
static inner class:go
method local inner class: Value of x in outer is FootballTeam

[Ankit Garg]

You forgot to do this part: Create code that accesses the outer class’s members from within the inner classes.