String builder append method in java queryStr.append(\\%AMPAMP\\$);

Question

queryStr.append("\\\\%AMPAMP\\\\$"); 

after executing this line the querStr removes

one \ from the string and the final result will be:

"\%AMPAMP\$"

I want it to be:

\\\\%AMPAMP\\\\$

Answer 1

You have to escape the slash:

queryStr.append("\\\\%AMPAMP\\\\$");

Answer 2

Do it like this:

queryStr.append("\\\\\\\\%AMPAMP\\\\\\\\$");

A character preceded by a backslash () is an escape sequence and has special meaning to the compiler. '\' Insert a backslash character in the text at this point.

You can read more here: http://docs.oracle.com/javase/tutorial/java/data/characters.html