![]() The class file version for Java SE 8 is 52.0 as per the JVM Specification. The Java class file format has been updated for the Java SE 8 release. For this reason, it is recommended that code is written in such a way so that it does not depend on unspecified behavior: In this scenario, the problem is not an incompatibility in the platform, is it a bug in the code. There are aspects of the platform's behavior that are intentionally unspecified and the underlying implementation may change in a platform release. In its simplest form, behavioral compatibility means that with the same inputs a program performs the same (or an equivalent) operation under different versions of libraries or the platform. For more details, see Why Developers Should Not Write Programs That Call 'sun' Packages.įor a list of deprecated APIs, see Deprecated APIs. Developers importing from sun.* packages do so at their own risk. These APIs are not intended for use by developers. Some APIs in the sun.* packages have changed. It is recommended that programs be modified to eliminate the use of deprecated APIs. The javac compiler generates a warning message whenever one of these is used, unless the -nowarn command-line option is used. See Incompatibilities between Java SE 8 and Java SE 7 and Incompatibilities between JDK 8 and JDK 7 for information.ĭeprecated APIs are interfaces that are supported only for compatibility with previous releases. However, implementation of some Java SE 8 features required changes that could cause code that compiled with Java SE 7 to fail to compile with Java SE 8. In general, the source compatibility policy is to avoid introducing source code incompatibilities. If these are used in a source file, that source file cannot be compiled on an earlier version of the Java platform. ![]() Java SE 8 includes new language features and platform APIs. Class files built with the Java SE 8 compiler will not run on earlier releases of Java SE. Except for the noted incompatibilities, class files built with the Java SE 7 compiler will run correctly in Java SE 8. Java SE 8 is binary-compatible with Java SE 7 except for the incompatibilities listed below. Incompatibilities in J2SE 5.0 (since 1.4.2).To examine Java SE 8 incompatibilities with earlier Java versions, you must trace incompatibilities through the listed files, in order. ![]() For example, this compatibility page reports only Java SE 8 incompatibilities with Java SE 7, and not with previous versions. The following compatibility documents track incompatibility between adjacent Java versions.
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