Github user uce commented on the pull request:
https://github.com/apache/incubator-flink/pull/44#issuecomment-47119600
I suggest to create a new Tuple2 for the swap, because your current
solution only works because of type erasure.
The following would not work:
```java
Tuple2<String, Integer> classUnderTestTuple2 = new Tuple2<String,
Integer>(new String("Test case"), 25);
classUnderTestTuple2.swapValues();
String s1 = classUnderTestTuple2.f1; // does not work
Integer i1 = classUnderTestTuple2.f0; // does not work
```
So for swapValues() you would do something like `new Tuple2<T1, T0>(T1,
T0)`.
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