Programming and Problem Solving with Java

472

18.A breakstatement located inside a switchstatement that is located within a

whileloop causes control to exit the loop immediately. (True or False?)

19.Classify each of the following as either an expression or an expression

statement.

a.sum = 0

b.sqrt(x)

c. y = 17 ;

d.count++

20.Rewrite each statement as described.

a.Using the +=operator, rewrite the statement

sumOfSquares = sumOfSquares + x * x;

b.Using the decrement operator, rewrite the statement

count = count – 1 ;

c. Using a single assignment statement that uses the ?:operator, rewrite the

statement

if(n > 8 )

k = 32 ;

else

k = 15 * n;

Programming Warm-Up Exercises

1. a.Declare an exception of the class MyException.
   b.Write the class MyException.
   c. Write the statement that throws an exception of class MyException.
   2.Write a try-catchstatement that attempts to open the file data.infor reading
   and writes an error message if an exception is thrown.
   3.Write a switchstatement that does the following:

If the value of grade(a variable of type char) is

‘A’, add 4 to sum

‘B’, add 3 to sum

‘C’, add 2 to sum

‘D’, add 1 to sum

‘F’, print “Student is on probation” on the PrintWriterfile outData

4.Modify the code you wrote for Exercise 3 so that an error message is printed if

gradedoes not equal one of the five possible grades.