File lejos-javac.patch of Package lejos
diff -pruN lejos.orig/bin/lejosjc lejos/bin/lejosjc
--- lejos.orig/bin/lejosjc 2006-09-17 11:51:48.000000000 +0200
+++ lejos/bin/lejosjc 2019-12-16 10:29:57.179246139 +0100
@@ -15,5 +15,5 @@ else
SEP=":"
fi
-javac -bootclasspath "$LEJOS_HOME/lib/classes.jar$SEP$LEJOS_HOME/lib/rcxcomm.jar$SEP${CLASSPATH:-.}" "$@"
+javac -source 7 -target 7 -bootclasspath "$LEJOS_HOME/lib/classes.jar$SEP$LEJOS_HOME/lib/rcxcomm.jar$SEP${CLASSPATH:-.}" "$@"
diff -pruN lejos.orig/bin/lejosjc.bat lejos/bin/lejosjc.bat
--- lejos.orig/bin/lejosjc.bat 2006-09-17 11:51:48.000000000 +0200
+++ lejos/bin/lejosjc.bat 2019-12-16 10:30:10.055195368 +0100
@@ -1,7 +1,7 @@
@echo off
if "%LEJOS_HOME%" == "" goto homeless
-javac -bootclasspath %LEJOS_HOME%\lib\classes.jar;%LEJOS_HOME%\lib\rcxcomm.jar;%CLASSPATH% %1 %2 %3 %4 %5 %6 %7 %8 %9
+javac -source 7 -target 7 -bootclasspath %LEJOS_HOME%\lib\classes.jar;%LEJOS_HOME%\lib\rcxcomm.jar;%CLASSPATH% %1 %2 %3 %4 %5 %6 %7 %8 %9
goto end
:homeless