You have a list of student ID numbers followed by the course number (separated by a space)...

You have a list of student ID numbers followed by the course number (separated by a space) that each student is enrolled in. The listing is in no particular order. For example, if student 1 is in CS100 and CS200 while student 2 is in CS105 and MATH210, then the list might look like this:

1 CS100

2 MATH210

2 CS105

1 CS200

Write a program that reads data in this format from the console. If the ID number is –1, then stop inputting data. Use the HashMap class to map from an Integer (the student ID number) to an ArrayList of type String that holds each course that the student is enrolled in. The declaration should look like this.

   HashMap> students =       new HashMap>();

After all the data is input, iterate through the map and output the student ID number and all courses stored in the vector for that student. The result should be a list of courses organized by student ID number.