Java generic Pair class printing our weird characters

Asked Nov 25 '17 at 18:01

Active May 31 '22 at 14:35

Viewed 94 times

I am using a generic Pair class which I took from here Generic pair class

Now I need to write unit tests for each method of the class. For these tests I wrote for example:

Pair p1 = new Pair("a",2);
Assert.assertEquals("(a,2)", p1.toString());`

My tests are failing with the following message. Could anyone help me how to overcome this issue for both the unit test and the program itself? I am very new at Java, and I couldn't find anything to solve this problem.

expected:<[(1,2)]> but was:<[Pair@58d25a40]>
    [junit] junit.framework.AssertionFailedError: expected:<[(1,2)]> but was:<[Pair@58d25a40]>

edited May 31 '22 at 14:35

Mark Rotteveel

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asked Nov 25 '17 at 18:01

kneazle

It sounds like you need to override `toString` in your class. – Oliver Charlesworth Nov 25 '17 at 18:03
Do you mean adding a new toString() method? – kneazle Nov 25 '17 at 18:06
Additionally, if it is a generic pair class, you're missing the type variables. https://stackoverflow.com/q/2770321/3788176 – Andy Turner Nov 25 '17 at 18:33
the elements can be string or int. I thought if I don't specify anything, they could be either. What would you suggest in that case? – kneazle Nov 25 '17 at 18:38
`Pair p1 = new Pair<>("a", 2);`. – Andy Turner Nov 25 '17 at 21:35

Java generic Pair class printing our weird characters

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