Java tutorial
import java.util.HashMap; import java.util.Map; public class MainClass { public static void main(String args[]) { String[] names = { "A", "J", "B", "E", "P" }; String[] ids = { "1", "2", "9", "8", "7" }; Map<String, String> IDMap = new HashMap<String, String>(); for (int i = 0; i < names.length; i++) IDMap.put(ids[i], names[i]); System.out.println(IDMap.size() + " Students entered: "); System.out.println(IDMap); } }