Half The Characters

Reads one line of input and prints every other character, starting with the first character.

Download files: HalfTheCharacters.java
Areas: User input and output.

HalfTheCharacters.java

1	/*
2	*This was a program found on a midterm given out by Prof. Bellantoni at the
3	*University of Toronto for Fall 1998
4	*/
5
6
7	import java.io.*;
8
9	public class HalfTheCharacters {
10	public static void main (String[] args) throws IOException {

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Question 1

What is the purpose of the 'throws IOException' clause?

Question 2

import java.io.*; imports every class found in the io package. However, only a few of the classes would need to be used. Write the import statements for these classes that would be used in lieu of the current import statement.

Question 3

Under what conditions will this loop terminate? Do not just state the condition as written in the for-loop. Try to express it in plain English.

Question 4

What are the possible values that i can have immediately after the last iteration of the loop?

Question 5

What does i represent in this case?

Question 6

What is the purpose of InputStreamReader?

Question 7

Why is the InputStreamReader wrapped in a BufferedReader?

Question 8

If the input line is "Hello,World", what does the program print?

Question 9

If we initialized i to 1, would the name of the class still hold true? What would be the difference?

Question 10

Reproduce the results of this program using a while loop instead of a for loop. You only have to produce the while loop that would be necessary. For the original program, why would the programmer choose a for loop instead of a while loop?