This library provides functions that perform type arithemtic over the type system of Java5. For example, you can compute that List<String> is a sub-type of Collection<String> but not Collection<Object>, you can compute the erasure of java.lang.reflect.Type, or you can determine the array component type T from A[T]

If you are using Maven, put the following dependency in your POM:

<dependency>
  <groupId>org.jvnet</groupId>
  <artifactId>tiger-types</artifactId>
  <version>RELEASE</version>
</dependency>

Otherwise just download the jar and put that in your classpath.