Write a public static method called getPIDs that has a parameter of type Map called nameToPID (keys are student names and values are student PIDs). It should return a HashSet containing all PIDs in nameToPID.

Java program is explained below

Explanation:

import java. util. HashSet;

import java. util. Map;

import java. util. TreeMap;

public class TruckRace1 {

public static HashSet getPIDs (MapnameToPID) {

HashSet pidSet = new HashSet ();

for (String ids: nameToPID. values ()) {

pidSet. add (ids);

}

return pidSet;

}

public static void main (String[] args) {

Map pids = new TreeMap ();

pids. put ("John","123");

pids. put ("Jason","124");

pids. put ("Peter","125");

pids. put ("Alice","126");

pids. put ("Peny","129");

HashSet ids = getPIDs (pids);

for (String id:ids) {

System. out. println (id);

}

}

}