2.3.2 [`currentTimeMillis`](https://docs.oracle.com/javase/8/docs/api/java/lang/System.html#currentTimeMillis--)与[`nanoTime`](https://docs.oracle.com/javase/8/docs/api/java/lang/System.html#nanoTime--) 2.3.3 [`exit`](https://docs.oracle.com/javase/8/docs/api/java/lang/System...
67) There are two forms ofwait( ). One version takes an argument in milliseconds that has the same meaning as insleep( ): "Pause for this period of time." But unlike withsleep( ), withwait(pause): a. The object lock is released during thewait( ). b. You can also come out of ...
the JavaFX documentation set: ■ Getting Started with JavaFX Conventions The following text conventions are used in this document: vii Convention boldface italic monospace Meaning Boldface type indicates graphical user interface elements associated with an action, or terms defined in text or the glossary...
Callable: This interface is similar to theRunnableinterface. It has thecall()method which you have to implement the logic of a task. TheCallableinterface isa parameterized interface, meaning you have to indicate the type of data thecall()method will return. Future: This interface has some metho...
The iterators returned by the synchronized collections are not designed to deal with concurrent modification, and they are fail-fastmeaning that if they detect that the collection has changed since iteration began, they throw the unchecked ConcurrentModificationException. These fail-fast iterators are ...
(be aware of sync object) / Composition- PLEASE Document- Basic Usage(built-in utils in JDK)- Synchronized Collections- `synchronized`: Vector / HashTable- be aware of `ConcurrentModificationException`- Concurrent Collections- ConcurrenHashMap / CopyOnWriteArrayList(`Arrays.copyOf` when write) / ...
In this book, you will find a number of text styles that distinguish between different kinds of information. Here are some examples of these styles and an explanation of their meaning. Code words in text, database table names, folder names, filenames, file extensions, pathnames, dummy URLs...
// That is the meaning of re-entrant. Or we can replace "synchronized{}" with code below: private static class Counter { private Lock lock = new ReentrantLock(); private int count = 0; public void increase() throws InterruptedException { ...
There are two things we need to remember about virtual threads. First, they are cheap to create, and much cheaper than the regular platform threads we've been using in the JDK for many years, in fact, since the beginning ofJava. Second, they are cheap to block. ...
The monitor that each thread contends for is independent of each other, which loses the meaning of synchronization and does not play a role in mutual exclusion. 3.5 Deadlock In addition, the use of synchronized also needs to pay attention to the problem that may cause deadlock. Let's first...