BasicAggregationWithMenu.java

import java.util.Scanner;

/**
 * Basic aggregation class structure using a menu-based approach.
 *
 * @author (Ruari Mears)
 * @version (05.01.2021)
 */
public class BasicAggregationWithMenu
{
    private AggregatedClass aggregatedObject = new AggregatedClass();

    public static void main(String[] args){
        BasicAggregationWithMenu main = new BasicAggregationWithMenu();
        main.menu();
    }

    private void menu(){
        Scanner scanner = new Scanner(System.in);
        System.out.println("1 Standard output");
        System.out.println("2 Standard input");
        System.out.println("3 Standard input and output");
        System.out.println("4 Menu item 4");
        System.out.println();
        System.out.println("Please enter your choice:");

        int choice = scanner.nextInt();

        switch (choice) {
            case 1:
                System.out.println("You chose to see standard output...");
                aggregatedObject.standardOutput();
                break;
            case 2:
                System.out.println("You chose to provide input to the " +
                    "standard input stream...");
                aggregatedObject.standardInputAndOutput();
                break;
            case 3:
                System.out.println("You chose the 3rd menu item...");
                aggregatedObject.method3();
                break;
            case 4:
                System.out.println("You chose the 4th menu item...");
                aggregatedObject.method4();
                break;
            default: System.out.println("Invalid choice");
        }
    }
}