JAVA

$-$

Use scnr to read integer entryNumber from input until the next entryNumber read is equal to $-1.$ If entryNumber is not equal to $-1$:

Assign currCertificate with a new Certificate object.

Use currCertificate's readDetails$()$ method to read the certificate's holder and level from input.

Append currCertificate to ArrayList certificateList.

import java.util.Scanner;

import java.util.ArrayList;

public class Certificates $\{$

public static void main$($String$[]$ args$)\{$

Scanner scnr $=$ new Scanner$($System$.$in$)$;

ArrayList certificateList $=$ new ArrayList$()$;

Certificate currCertificate;

int entryNumber;

int i;

$/*$ Your code goes here $*/$

for $($i $=0$; i $<$ certificateList.size$()$; $++$i$)\{$

currCertificate $=$ certificateList.get$($i$)$;

currCertificate.print$()$;

$\}$

$\}$

$\}$