Java Reference
In-Depth Information
Display 9.9
Use of a
throws
Clause
(part 2 of 2)
13
double
quotient = safeDivide(numerator, denominator);
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System.out.println(numerator + "/"
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+ denominator
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+ " = " + quotient);
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}
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catch
(DivisionByZeroException e)
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{
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System.out.println(e.getMessage());
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secondChance();
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}
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System.out.println("End of program.");
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}
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public static
double
safeDivide(
int
top,
int
bottom)
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throws
DivisionByZeroException
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{
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if
(bottom == 0)
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throw new
DivisionByZeroException();
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return
top/(
double
)bottom;
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}
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public static void
secondChance()
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{
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Scanner keyboard =
new
Scanner(System.in);
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try
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{
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System.out.println("Enter numerator:");
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int
numerator = keyboard.nextInt();
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System.out.println("Enter denominator:");
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int
denominator = keyboard.nextInt();
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double
quotient = safeDivide(numerator, denominator);
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System.out.println(numerator + "/"
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+ denominator
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+ " = " + quotient);
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}
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catch
(DivisionByZeroException e)
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{
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System.out.println("I cannot do division by zero.");
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System.out.println("Aborting program.");
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System.exit(0);
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}
The input/output dialogues are
identical to those for the program in
Display 9.4.
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}
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}
