InterfaceComparableLab/src/main/java/com/zipcoder/payment/PaymentPresenter.java

package com.zipcoder.payment;

		import java.util.ArrayList;
		import java.util.Arrays;
		import java.util.Comparator;

public class PaymentPresenter {


	public String toString(Payments[] payments) {
		StringBuilder sb = new StringBuilder();
		Arrays.sort(payments);
		for (int i = 0; i < payments.length; i++) {
			sb.append(payments[i].getShortDescription()+"\n");
		}
		return sb.toString();
	}


	public String toStringByPayerName(Payments[] payments) {
		StringBuilder sb = new StringBuilder();
		Arrays.sort(payments, new PaymentSortByPayer());
		for (int i = 0; i < payments.length; i++) {
			sb.append(payments[i].getShortDescription()+"\n");
		}
		return sb.toString();

	}

	public String toStringById(Payments[] payments) {

		Comparator<Payments> id = ((o1, o2) -> o1.getID().compareTo(o2.getID()));
				StringBuilder sb = new StringBuilder();
		Arrays.sort(payments, id);
		for (int i = 0; i < payments.length; i++) {
			sb.append(payments[i].getShortDescription()+"\n");
		}
		return sb.toString();

	}
	}