Char to Varchar

I am facing some problem in some SQL coding recently.

The problem is like this:
A database field having a data type of Char[3], when using java coding style to execute the SQL, it automatically convert the data to java.lang.Character, which I don't understand why a Char[3] (Example: "abc") can converted into java.lang.Character (Example: "a"). The last 2 characters had been eaten.

So, my solution will be changing the SQL code from [select testAbc from tableAbc] to [select cast(testAbc, varchar(3)) from tableAbc]. With the help of "Cast", it finally manage to convert the data to java.lang.String & output correctly.