Answers to practicetest1.

1.  soft 
2.  soft
3.  hard
4.  soft
5.  soft
6.  hard

9.  true
10. true
11. false
12. false
13. true
14. false
15. true
16. false

17. public static void

18. valid
    valid
    invalid
    invalid
    invalid
**  invalid (can't start with digit)
    valid

19. class names, variable names, method names

21. 

Seg 1:
  2 3 4.0 8.5

Seg 2:
  -2

Seg 3:
  12.5

Seg 4:
  3 8 end

Seg 5:
  greater

Seg 6:
  3 18.2

Seg 7:
  end

Seg 8:
  happy
  end

Seg 9:
  nothing

Seg 10:
  nothing

Seg 11:
  6
  6
  9

Seg 12:
  108

Seg 13:
  2

Seg 14:
  two
  three
  one
  multiple
  three


22)
  import java.util.*;
  import java.io.*;
  class Avg {
      public static void main (String [] args) throws IOException {
        BufferedReader stdin = new BufferedReader
                                 (new InputStreamReader(System.in));
	StringTokenizer tok = new StringTokenizer(stdin.readLine());
        float average = 0;
        System.out.println("Enter 5 integers on the same line:);
        for (int i = 1; i <= 5; i++) {
          average += Integer.parseInt(tok.nextToken());
        }
        average /= 5;
        System.out.println("Average: " + average);
     }
  }

23)
	BufferedReader infile = new BufferedReader(
				new FileReader("infile.txt"));
	PrintWriter outfile = new PrintWriter(
				new FileWriter("outfile.txt")));
	outfile.println(infile.readLine());



John Shiles
Department of Computer Science
Johns Hopkins University