Surrogatepair

  
            License: Freeware $0.00
            OS: Java,Linux,Mac OS X,Unix,Win2000,Win7 x32,Win7 x64,WinServer,WinVista,WinVista x
            Requirements: java 1.5+
            Publisher: Canadian Mind Products
            Homepage: http://mindprod.com
          

converts 32-bit unicode codepoints to 16-bit surrogate pairs for java string literals.
it lets you enter string literals containing unsupported c-style
\uxxxxxxxx escape sequences and it converts them to java-supported
surrogate pair escape sequences.

you can use the program without installing it at
mindprod.com/jgloss/surrogatepair.html

you can also run it as a standalone program, invoking it with

java com.mindprod.surrogatepair.surrogatepair
or
java surrogatepair.jar