This article is related to escaping of “\u” backslash u [Unicode character] in Java Problem Statement: I have a string which consists of a DOS path something like "\sample\user_data\example".The “\u” (backslash u) in “\user_data” above gives “an invalid Unicode” JavaScript error in IE and hence my page isn’t displayed. I tried to replace “\u” (backslash u) in the string with something like "\ u"(backslash u) as I was not able to escape it. This also does not work . Java complier does not allow “\u” (backslash u) character and gives "Invalid unicode character sequence" error when I use it with replaceAll. Que 1: Can I escape the \u character some how in Java or JavaScript? Que 2: How can I replace all "\u" character in a string with something else like "\ u"? I have posted this query to some of the Java and JavaScript related groups. Here are the solutions I found Before going into the details about solution let us