j1

tiny Java interpreter.

j1 execute compiled class with arguments embeded main fucntion(ex: $ j1 foo; -> main(){ foo; })

JVM environment inherit standard input from j1 process. You can write filter command like awk/sed.

Example

Hello world

$ j1 'System.out.println("Hello world.\n");'
Hello world.

Similer cut(1) command

echo "foo,bar,bazz" | ./j1 'try{byte b[] = new byte[12];System.in.read(b);String s = new String(b);System.out.println(s.split(",")[2]);}catch(Exception e){}'