$ apt-cache depends maven2
maven2
  Depends: libmaven2-core-java
 |Depends: default-jre
 |Depends: default-jre-headless
 |Depends: <java2-runtime>
    openjdk-6-jre
    default-jre
    gcj-4.4-jre
    gcj-jre
  Depends: <java2-runtime-headless>
    openjdk-6-jre-headless
    default-jre-headless
    gcj-4.4-jre-headless
    gcj-jre-headless
    gij-4.3
  Recommends: libmaven-clean-plugin-java
  Recommends: libmaven-compiler-plugin-java
  Recommends: libmaven-install-plugin-java
  Recommends: libmaven-jar-plugin-java
  Recommends: libmaven-resources-plugin-java
  Recommends: libmaven-shade-plugin-java
  Conflicts: <maven2-binary>
  Replaces: <maven2-binary>