Create a .java file containing the following text:

------- A.java -------
class A {
}
class B {
}
class C {
}
------- A.java -------

If you compile this file and then look at the A.class file you will find
entries in its constant pool for the B and C classes even though those
classes have no dependencies or runtime relationship to the A class. This
causes some bloat of each of the class files.