Our development is extensively java and sql related, we have a lot of embedded sql strings inside the java codes

if we can bring in the SQL syntax highlighting into the java editor then it will substantially increase our dev's productivity 

borrowing the idea from <editor-fold> we can have some *magic* comments to hint the editor to switch syntax highlighting mode

for example 

String sql = /*<syntax lang='sql'>*/ "select * from user" /*</syntax>*/;

to extend the idea further, we can have embedded HTML/XML code highlighting

String html = /*<syntax lang='xml'>*/ "<div>{namePlaceHolder}</div>" /*</syntax>*/;