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1. How to print a list with a different separator from the comma?    stackoverflow.com

I keep on copy-pasting the following in my programs. I'm wondering if anyone of you uses similar code, perhaps in a library to achieve the same.

@Override
public String toString() {
   ...

2. how to print only strings using generics when the list is having multiple types    coderanch.com

3. Printing a Purchase Order list in Java.    forums.oracle.com

4. getting paper sizes list of currently installed printer    forums.oracle.com