why so many “\” s there in this code…what is the usage of it..?

Question

I am a beginner to servlets..and I got a question seeing this code written inside a servlet.I\'ll be thankful if someone explain me the usage of soo many\"\\\"s here

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Answer 1

You must escape the quotes " inside Strings by writing \". If you don't do this, the Strings will end too early.

Edit: Example:

String thisWillNotCompile =  "This String terminates right now" and not later";

Trying to compile this will give you a syntax error.

String thisWillCompile = "This String doesn't terminate right now\" but now";

This works.

Edit 2: For more details read up on Escape Sequences in the Java Tutorial.

Answer 2

\ known as escape character in programming languages. You use this to escape some special characters. For example if you want to print a string called

Hello " World

If you specify

system.out.println("Hello " World"); // Sorry Error :(

This will give an error because " is a special character. So you need to escape this by putting

system.out.println("Hello \" World"); // It works :)

Answer 3

It's to indicate that the character " is not a special character that marks the end of the string, but it's part of the string.