Download Main.java and run this command in a terminal. You need Java 1.6 or higher.
Change ~/Downloads if u need.
RUTA=$( [ -d ~/Downloads ] && echo ~/Downloads || echo ~/Descargas );
( command -v gnome-terminal >/dev/null && gnome-terminal --geometry=40x23 -- bash -c "cd "$RUTA" && java Main.java; exec bash" )
|| ( command -v xfce4-terminal >/dev/null && xfce4-terminal --geometry=40x23 --command="bash -c 'cd "$RUTA" && java Main.java; exec bash'" )
|| ( command -v konsole >/dev/null && konsole --geometry 40x23 --hold -e bash -c "cd "$RUTA" && java Main.java" )
|| ( command -v mate-terminal >/dev/null && mate-terminal --geometry=40x23 -- bash -c "cd "$RUTA" && java Main.java; exec bash" )
|| ( command -v tilix >/dev/null && tilix --geometry=40x23 -e "bash -c 'cd "$RUTA" && java Main.java; exec bash'" )
|| ( command -v terminator >/dev/null && terminator --geometry=40x23 -x bash -c "cd "$RUTA" && java Main.java; exec bash" )
|| ( command -v xterm >/dev/null && xterm -geometry 40x23 -e "cd "$RUTA" && java Main.java" )