question: private void addToCache ( JarInputStream fis , String mnemo ) { String text = "" ; byte [ ] buf = new byte [ 4096 ] ; int i = 0 ; try { while ( ( i = fis . read ( buf ) ) != - 1 ) { text += new String ( buf , 0 , i ) ; } } catch ( IOException ignored ) { } helpcache . put ( mnemo , text ) ; }
target:  load from specified JarInputStream