Remaining Problems Several problems still remain in spite of the introduction of `strictfp'. Lack of implementation There are few implementations: BulletTrain (AOT compiler) and shuJIT Java compiler support of `strictfp' Java compilers must also be aware of `strictfp'. Java compilers do some calculations at compile time. The calculations have to be performed in an appropriate context: default or strict At least, a javac command of Sun's JDK 1.3.0 RC3 and IBM JDK 1.3 ER does not support the `strictfp'. Single-precision operations in the default context is prescribed by the language specification. Developers of the Java runtime systems should note this spec.