Chapter 3. Code-level integration
This chapter covers
- Calling Groovy scripts from Java using JSR 223
- Calling Groovy scripts from Java using Groovy library classes
In chapter 1 I reviewed many of Java’s arguable weaknesses and drawbacks and suggested ways that Groovy might help ameliorate them. Because that chapter was intended to be introductory, I only suggested how Groovy can help, without showing a lot of code examples.
This chapter begins an examination of Java and Groovy integration in detail. In this chapter I’ll start using Groovy and Java together in fundamental ways, without worrying about frameworks or addressing any particular use case. A guide to the techniques discussed in this chapter is shown in figure 3.1.