Divide by zero exception when rotating an empty List
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Key: HARMONY-19
URL: http://issues.apache.org/jira/browse/HARMONY-19
Project: Harmony
Type: Bug
Components: Contributions
Environment: All
Reporter: George Harley
Assigned to: Geir Magnusson Jr
The implementation of method rotate(List, int) in java.util.Collections is not
checking the size of the input list prior to attempting the rotation. As a
result, when called with an empty List argument a java.lang.ArithmeticException
will occur because of the the subsequent divide by zero operation.
The problem can be demonstrated in the below unit test case ...
public void testRotateEmptyList() {
// Create an *empty* list
List list = new ArrayList();
try {
Collections.rotate(list, 25);
} catch (Exception e) {
fail("Unexpected exception rotating empty List : " + e);
}
}
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