computer science

List of Java APIs

List of Java APIs is a computer science topic covered in the lgStudy science library. This page brings together a partial reference excerpt, illustrations, worked examples, real-world applications and a short study plan, so you can understand List of Java APIs rather than just read about it. In short: There are two types of Java programming language application programming interfaces (APIs): The official core Java API, contained in the Android (Google), SE (OpenJDK and Oracle), MicroEJ. These packages (java.* packages) are the core Java language packages, meaning that programmers using the Java language had to use them in order to make any worthwhile use of the Java language.

Key takeaways

List of Java APIs belongs to computer science; place it in that map before memorising details.
Learn the definition first, then one example that makes the definition concrete.
Connect List of Java APIs to a quantity you can measure, compute or draw — that is where exam questions come from.
Reproduce the core statement of List of Java APIs from memory before moving on to harder problems.

Reference excerpt

There are two types of Java programming language application programming interfaces (APIs):

The official core Java API, contained in the Android (Google), SE (OpenJDK and Oracle), MicroEJ. These packages (java.* packages) are the core Java language packages, meaning that programmers using the Java language had to use them in order to make any worthwhile use of the Java language. Optional APIs that can be downloaded separately. The specification of these APIs are defined according to many different organizations in the world (Alljoyn, OSGi, Eclipse, JCP, E-S-R, etc.). The following is a partial list of application programming interfaces (APIs) for Java.

APIs

Following is a very incomplete list, as the number of APIs available for the Java platform is overwhelming.

Rich client platforms Eclipse Rich Client Platform (RCP) NetBeans Platform Office_compliant libraries Apache POI JXL - for Microsoft Excel JExcel - for Microsoft Excel Compression LZMA SDK, the Java implementation of the SDK used by the popular 7-Zip file archive software (available here) JSON Jackson (API) Game engines Slick jMonkey Engine JPCT Engine LWJGL Real-time libraries Real time Java is a catch-all term for a combination of technologies that allows programmers to write programs that meet the demands of real-time systems in the Java programming language. Java's sophisticated memory management, native support for threading and concurrency, type safety, and relative simplicity have created a demand for its use in many domains. Its capabilities have been enhanced to support real time computational needs:

Java supports a strict priority based threading model. Because Java threads support priorities, Java locking mechanisms support priority inversion avoidance techniques, such as priority inheritance or the priority ceiling protocol. To overcome typical real time difficulties, the Java Community introduced a specification for real-time Java, JSR001. A number of implementations of the resulting Real-Time Specification for Java (RTSJ) have emerged, including a reference implementation from Timesys, IBM's WebSphere Real Time, Sun Microsystems's Java SE Real-Time Systems,[1] Aonix PERC or JamaicaVM from aicas. The RTSJ addressed the critical issues by mandating a minimum (only two) specification for the threading model (and allowing other models to be plugged into the VM) and by providing for areas of memory that are not subject to garbage collection, along with threads that are not preempt able by the garbage collector. These areas are instead managed using region-based memory management.

Real-Time Specification for Java The Real-Time Specification for Java (RTSJ) is a set of interfaces and behavioral refinements that enable real-time computer programming in the Java programming language. RTSJ 1.0 was developed as JSR 1 under the Java Community Process, which approved the new standard in November, 2001. RTSJ 2.0 is being developed under JSR 282. A draft version is available at JSR 282 JCP Page. More information can be found at RTSJ 2.0

Javolution Windowing libraries Standard Widget Toolkit (SWT) Physics libraries JBox2D JBullet dyn4j

See also Java Platform Java ConcurrentMap List of Java frameworks

External links APISonar - Search Java API examples

Worked examples

Example 1 — a first encounter with List of Java APIs

Start with the simplest possible case. Write down what List of Java APIs claims or describes in one sentence, then invent the smallest concrete situation in which that sentence is true. In computer science, the smallest case is usually a single object, a single equation or a single measurement. Check that every symbol or term in your sentence has a meaning in that case.

Example 2 — changing one variable

Take the situation from Example 1 and change exactly one quantity: double it, halve it, or set it to zero. Predict what should happen to List of Java APIs before you calculate. Comparing your prediction with the result is the fastest way to find out whether you understand the idea or only the words.

Example 3 — an exam-style question

Typical questions about List of Java APIs ask you to (a) state it precisely, (b) apply it to given data, and (c) explain a limitation. Practise writing all three answers in under five minutes; the third part is what separates a full-mark answer from an average one.

Applications of List of Java APIs

In research: List of Java APIs appears in computer science research whenever the underlying quantities have to be modelled precisely. Papers usually cite it as a starting assumption and then explore where it breaks down.
In technology and industry: Engineering practice reuses List of Java APIs in design rules, simulations and safety margins. Knowing the idea lets you read a specification sheet and understand why the numbers look the way they do.
In the classroom: List of Java APIs is common in secondary-school and first-year university syllabi. It links to neighbouring topics Java APIs, Lists of software, so understanding it makes those chapters shorter.
In everyday life: Look for List of Java APIs outside the textbook — in sport, cooking, traffic, electronics or the sky above you. An example you found yourself is remembered far longer than one you were given.

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How to study List of Java APIs in 20 minutes

Read the reference excerpt below once, without taking notes.
Close the page and write down what List of Java APIs means in your own words.
Compare your version with the excerpt and mark what you missed.
Work through the three examples above with pen and paper.
Explain List of Java APIs out loud to somebody else — or to Teacher Smith in the lgStudy chat.

Frequently asked questions

What is List of Java APIs in simple terms?

There are two types of Java programming language application programming interfaces (APIs): The official core Java API, contained in the Android (Google), SE (OpenJDK and Oracle), MicroEJ. These packages (java.* packages) are the core Java language packages, meaning that programmers using the Java…

Why does List of Java APIs matter?

Because it connects several computer science ideas at once: it gives you a definition you can apply, a quantity you can calculate, and a way to check whether a result is plausible.

How should I study List of Java APIs?

Read the excerpt, restate it from memory, then work through the examples and applications listed on this page. The five-step study plan above takes about twenty minutes.

What does this page cover?

It gives you a compact reference excerpt plus original lgStudy explanations, examples, applications and study material on List of Java APIs.