jrun

.local/bin/jrun

@@ -1,6 +1,14 @@
 #!/bin/env bash
 
+# Script to run simple .java files.
+# because its annoying to have .class files clutter your working directory;
+
+if [ -z $* ]; then
+    echo "usage: jrun <filename>"
+else
     filename="${1%.*}"
     \cp -f "$1" /tmp/"$1"
     javac -d /tmp "$1"
     java -cp /tmp "$filename"
+fi
+