' \ '-Invalid character constant?

Question

I need to do this:

while (result2.charAt(j)!='\'){

    }

I get an error saying: Invalid character constant .

Why? and how can I get over it?

Answer 1

The backslash is a special character and it needs to be escaped with another backslash. Like this:

while (result2.charAt(j)!='\\'){

}

Answer 2

Use '\\\\' . It's because backslash is used in escape sequence like '\\n' . With a single \\ the compiler have no way to know.

Answer 3

Looks like you need to escape the backslash. Try

while (result2.charAt(j)!='\\'){

    }

Answer 4

I got this similar error in Eclipse for Android although for different situation, and I just figured out that in Java you cannot enclose a string (multi-character word) in single quotes. So you need to have like - "sampleword" strings enclosed in double quotes rather than single quote to get rid of such error thought I could just share it here for others to refer..

Answer 5

Same error here, but using unicode character representation.

005C is backlash character. Need to escape it: "\\" .

Example:

str = str.replace("\\u005C", "'\\u005C'");

Answer 6

You need to escape it I think,

So you need to do

while(results2.charAt(j)!='\\')
{
}

I think that's the solution I think

Answer 7

you need an extra character '\\'

" " " == " \" "


" \ " == " \\ "