piston/lxc/executors/java

#!/bin/bash

cd /tmp/$2
name=$(grep -Po "(?<=\n|\A)\s*(public\s+)?(class|interface)\s+\K([^\/\\\n\s{]+)" code.code)

runuser runner$1 -c "
    cd /tmp/$2
    cp code.code $name.java
    javac $name.java
    timeout -s KILL 3 xargs -a args.args -d '\n' java $name < stdin.stdin
"