# Hierarchy For Package org.apache.tools.ant.util.optional

Package Hierarchies:

- All Packages

## Class Hierarchy

- java.lang.Object
  - org.apache.tools.ant.util.ScriptRunnerBase
    - org.apache.tools.ant.util.optional.JavaxScriptRunner
    - org.apache.tools.ant.util.optional.ScriptRunner
  - java.lang.SecurityManager
    - org.apache.tools.ant.util.optional.NoExitSecurityManager
  - org.apache.tools.ant.util.WeakishReference
    - org.apache.tools.ant.util.WeakishReference.HardReference
      - org.apache.tools.ant.util.optional.WeakishReference12