Java “too many constants” JVM error

Question

I\'m developing an application that generates and compiles classes at runtime. This will sometimes create huge amounts of generated code.

With one of our test cases,

Answer 1

From: JVM Spec

you can see that the classfile.constant_pool_count has a 'u2' type, which limits it to 65535 entries

ClassFile {
    u4 magic;
    u2 minor_version;
    u2 major_version;
    u2 constant_pool_count;
    cp_info constant_pool[constant_pool_count-1];
    u2 access_flags;
    u2 this_class;
    u2 super_class;
    u2 interfaces_count;
    u2 interfaces[interfaces_count];
    u2 fields_count;
    field_info fields[fields_count];
    u2 methods_count;
    method_info methods[methods_count];
    u2 attributes_count;
    attribute_info attributes[attributes_count];
}