Java Reference
In-Depth Information
12
13
// Stack<Double> assigned to Stack of raw types variable
Stack rawTypeStack2 =
new
Stack<Double>(5);
14
15
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// Stack of raw types assigned to Stack<Integer> variable
Stack<Integer> integerStack =
new
Stack(10);
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18
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testPush(
"rawTypeStack1"
, rawTypeStack1, doubleElements);
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testPop(
"rawTypeStack1"
, rawTypeStack1);
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testPush(
"rawTypeStack2"
, rawTypeStack2, doubleElements);
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testPop(
"rawTypeStack2"
, rawTypeStack2);
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testPush(
"integerStack"
, integerStack, integerElements);
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testPop(
"integerStack"
, integerStack);
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}
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// generic method pushes elements onto stack
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public
static
<T>
void
testPush(String name, Stack<T> stack,
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T[] elements)
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{
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System.out.printf(
"%nPushing elements onto %s%n"
, name);
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// push elements onto Stack
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for
(T element : elements)
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{
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System.out.printf(
"%s "
, element);
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stack.push(element);
// push element onto stack
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}
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}
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// generic method testPop pops elements from stack
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public static
<T>
void
testPop(String name, Stack<T> stack)
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{
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// pop elements from stack
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try
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{
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System.out.printf(
"%nPopping elements from %s%n"
, name);
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T popValue;
// store element removed from stack
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// remove elements from Stack
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while
(
true
)
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{
53
popValue = stack.pop();
// pop from stack
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System.out.printf(
"%s "
, popValue);
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}
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}
// end try
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catch
(EmptyStackException emptyStackException)
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{
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System.out.println();
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emptyStackException.printStackTrace();
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}
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}
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}
// end class RawTypeTest
Fig. 20.11
|
Raw-type test program. (Part 2 of 3.)
