printClass: command not found

Maybe Your $PATH variable doesn't contain the default paths? echo $PATH should give something like:

[root@server ~]# echo $PATH
/usr/local/sbin:/usr/local/bin:/sbin:/bin:/usr/sbin:/usr/bin:/root/bin

If it's empty, You may set the PATH variable with this command

export PATH="/usr/local/sbin:/usr/local/bin:/sbin:/bin:/usr/sbin:/usr/bin:/root/bin"

On Debian possible default full paths are:

/usr/bin/printClass - from package: findbugs

You may install the required package with command apt-get install {package}

Error in other languages:
printClass: bevel nie gevind nie
printClass: comandă negăsită
printClass: comando não encontrado
printClass: commande introuvable
printClass: command not found
printClass: käsku ei ole
printClass: không tìm thấy lệnh
printClass: komanda nerasta
printClass: Kommando nicht gefunden.
printClass: kommandot finns inte
printClass: komut yok
printClass: nie znaleziono polecenia
printClass: níor aimsíodh an t-ordú
printClass: no se encontró la orden
printClass: no s'ha trobat l'ordre
printClass: opdracht niet gevonden
printClass: parancs nem található
printClass: perintah tidak ditemukan
printClass: príkaz nenájdený
printClass: příkaz nenalezen
printClass: команда не найдена
printClass: командата не е открита
printClass: 命令找不到
printClass: コマンドが見つかりません