---
name: "aj"
section: "1"
platform: "linux"
package: "aspectj"
version: "1.9.6-1"
release: "Debian 13 (Trixie)"
platforms: ["linux"]
url: "https://new.carta.tech/aj"
---

# aj(1)

command-line launchers for load-time weaving

## NAME

aj, aj5 — command-line launchers for load-time weaving

## SYNOPSIS

**aj** \[*Options*\]  \[*arg...* \]

**aj5** \[*Options*\]  \[*arg* ... \]

## DESCRIPTION

The  **aj** command runs Java programs in Java 1.4 or  later by setting up  **WeavingURLClassLoader** as the system class  loader, to do load-time bytecode weaving.

The  **aj5** command runs Java programs using AspectJ Java5 JVMTI  agent to do load-time bytecode weaving.

The arguments are the same as those used to launch the Java program.  Users should define the environment variables  **CLASSPATH** and  **ASPECTPATH**.