tools.jarが無いのですがどうやってコンパイルしたらいいか教えてください

https://docs.oracle.com/javase/9/migrate/toc.htm
＞Migrating to JDK 9
＞Removed rt.jar and tools.jar
＞Class and resource files previously stored in lib/rt.jar, lib/tools.jar, lib/dt.jar and various other internal JAR files
＞are stored in a more efficient format in implementation-specific files in the lib directory.