build-classpath: 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 CentOS possible default full paths are:

/usr/bin/build-classpath - from package: jpackage-utils

You may install the required package with command yum install {package}

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