Java to smali conversion, one liner.

java2smali.sh

#!/bin/sh

set -e

JAVA_HOME='/Applications/Android Studio.app/Contents/jre/jdk/Contents/Home'
cd /tmp

cat > input_tmp.java <<EOF
public class input_tmp {
    public static void main(String[] args) {
         $1
    }
}
EOF

javac -source 7 -target 7 input_tmp.java
/Users/me/Library/Android/sdk//build-tools/25.0.0/dx --dex --output=classes.dex input_tmp.class
java -jar /Users/me/Downloads/baksmali-2.2.1.jar dis classes.dex
cat out/input_tmp.smali

rm -rf input_tmp.class input_tmp.java classes.dex out