Assignment for Sorting

person.java

import java.util.ArrayList;
import java.util.Collections;
import java.util.Scanner;

public class Runner {
	
	public static ArrayList<Person> pList = new ArrayList<Person>();
	public static Scanner scan = new Scanner(System.in);
	
	public static void lineBreak(){
		System.out.println("------------------------");
	}
	public static void displayChoice(){
		System.out.println("[1] Add person\n"
				+ "[2] Edit\n"
				+ "[3] Remove\n"
				+ "[4] Search\n"
				+ "[5] Sort\n"
				+ "[6] View\n"
				+ "[7] Exit\n");
	}
	
	public static int promptUser(){
		int choice;
		System.out.print("Enter choice: ");
		choice = scan.nextInt();
		scan.nextLine();
		return choice;
	}
	
	public static void verifyChoice(int choice){
		int index = 0, age;
		String name;
		
		switch(choice){
		case 1: 
			System.out.println("Add a person");
			lineBreak();
			System.out.print("Enter name: ");
			name = scan.nextLine();
			System.out.print("Enter age: ");
			age = scan.nextInt(); scan.nextLine();
			Person dummy = new Person(age, name);
			pList.add(dummy);
			break;
		case 2: 
			System.out.println("Edit a person");
			lineBreak();
			System.out.print("Enter index: ");
			index = scan.nextInt(); scan.nextLine();
			System.out.print("Enter new name: ");
			name = scan.nextLine();
			System.out.print("Enter new age: ");
			age = scan.nextInt(); scan.nextLine();
			pList.get(index).setName(name);
			pList.get(index).setAge(age);
			break;
		case 3: 
			System.out.print("Remove a person");
			lineBreak();
			System.out.print("Enter index: ");
			index = scan.nextInt(); scan.nextLine();
			break;
		case 4: 
			boolean isExist = false;
			System.out.print("Search a person");
			lineBreak();
			System.out.print("Enter name: ");
			name = scan.nextLine();
			for(int i = 0; i < pList.size(); i++){
				if(pList.get(i).getName().toLowerCase().equals(name.toLowerCase())){
					isExist = true; 
					break;
				}
			}
			System.out.println("Name existing: " + isExist);
			break;
		case 5:
			System.out.println("Sorting List");
			lineBreak();
			
			// Sort Start
			for(int i = 0; i < pList.size()-1; i++){
				name = pList.get(i).getName();
				age = pList.get(i).getAge();
				System.out.println("Pass: " + i + "-> " + name + " - " + age);
				for(int j = i+1; j < pList.size(); j++){
					if(age == pList.get(j).getAge() && name.compareToIgnoreCase(pList.get(j).getName()) < 0){
						name = pList.get(j).getName();
						index = j;
						System.out.println("Sort by name");
					} else if(age > pList.get(j).getAge()){
						age = pList.get(j).getAge();
						index = j;
						System.out.println("Sort by age");
					}			
					System.out.println("Index - > " + index);
					Collections.swap(pList, i, index);
				}
				
			}
			// End Sort
			break;
		case 6:
			System.out.println("Display list");
			lineBreak();
			System.out.println("Name\t\tAge");
			lineBreak();
			for(int i = 0; i < pList.size();i++){
				System.out.println(pList.get(i).getName() + "\t\t" + pList.get(i).getAge());
			}
			break;
		case 7:
			System.out.println("---------\nProgram exit");
			break;
		default:
			System.out.println("Unknown input");
			break;
				
		}
	}
	
	public static void main(String[] args){
		int choice = 0;
		do{
			displayChoice();
			choice = promptUser();
			verifyChoice(choice);
		} while(choice != 7);
	}
}