1 Guava: Google Core Libraries for Java (JDK5 Backport) 2 ===================================================== 3 4 This is the JDK5 backport of Guava. Notable differences from the 5 JDK6 version of Guava include: 6 7 - A variety of code is removed, most notably code that uses 8 `Math.scalb`, `Deque` and its inheritors, `NavigableMap`, 9 `NavigableSet` and their inheritors, and lots of methods that don't 10 make sense without the above. 11 - `TimeUnit` only supports `SECONDS` as the highest granularity time 12 unit in 1.5, so all uses of `MINUTES`, `DAYS` and `HOURS` have been 13 re-cast in terms of `SECONDS`. 14 - `Charset`-accepting methods on `String` and elsewhere were added in 15 1.6, so all charsets are passed in by using `Charsets.FOO.name()`, 16 and exceptions are trapped or thrown as appropriate. 17 - The guava-gwt module is disabled by not including it in the list 18 of modules in the parent pom.xml. 19 20 The JDK5 backport builds with Maven, but has a number of 21 ideosyncrasies. 22 23 - While it uses `-source 1.5` and `-target 1.5` and produces valid 1.5 24 compatible class files, the backport does not build with JDK5. 25 @Override annotations on interface methods are retained. 26 - It requries a custom ExecutorService and AbstractExecutorService, 27 which we build in a boostrap project which is included in the build 28 of guava, guava-testlib and guava-tests. 29 - The Maven build will use a bootstrap rt.jar classpath based on a 30 standard sun JDK on unix. But this is overridable on a Mac by 31 passing in `-Dbootstrap.classes=/path/to/my/classes.jar`. Since 32 the backport will not build with JDK5, a JDK5 `rt.jar` should be used 33 to ensure that no JDK6+ APIs are used. If you have difficulties 34 building, please try setting the `bootstrap.classes` property to a 35 known `rt.jar` or `classes.jar`. 36 - Some tests will fail when run under JDK5 due to `guava-testlib` and 37 `guava-tests` having dependencies on other libraries that are compiled 38 with `-target 1.6`. 39
