Java7シンタックスで レガシーコードを快適メンテナンスThe document discusses Java versions and new features. It notes that Java 7 introduced features like string switches and try-with-resources statements. It also discusses how to compile Java 7 code to target older Java versions like Java 6 and 1.4.2 by using the "-target jsr14" compiler flag, which allows using some but not all Java 7 features on older virtual machines.
