Replace with empty string replaces newChar around all the characters in original string

Question

I was just working on one of my java code in which I am using Java String.replace method. So while testing the replace method as in one situation I am planning to put junk v

Answer 1

Take a look at this example:

"" + "abc" + ""

What is result of this code?
Answer: it is still "abc". So as you see we can say that all strings have some empty strings before and after it.

Same rule applies in-between characters like

"a"+""+"b"+""+"c"

will still create "abc"

So empty strings also exists between characters.

In your code

"val".replace("","p")

all these empty strings ware replaced with p which result in pvpaplp.

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In case of ""+""+..+""+"" assume that Java is smart enough to see it as one "".