One example of inner interface used in java standard library is java.util.Map and Java.util.Map.Entry. Here java.util.Map is used also as a namespace. Entry does not belong to the global scope, which means there are many other entities that are Entries and are not necessary Map's entr...
By default a Connection object is in auto-commit mode, which means that it automatically commits changes after executing each statement. If auto-commit mode has been disabled, the method commit must be called explicitly in order to commit changes; otherwise, database changes will not be saved....
In addition,Runnableprovides the means for a class to be active while not subclassingThread. A class that implementsRunnablecan run without subclassingThreadby instantiating aThreadinstance and passing itself in as the target. In most cases, theRunnableinterface should be used if you are only planni...
the native code as COM objects, the JNI interface itself is binary-compatible with COM. JNI uses the same jump table structure and calling convention that COM does.This means that, as soon as cross-platform support for COM is available, the JNI can become a COM interface to the Java VM....
“The tag/ marker interface pattern is a design pattern in computer science, used with languages that provide run-time type information about objects. It provides a means to associate metadata with a class where the language does not have explicit support for such metadata.“ Java Serialization ...
Accessing Java Objects The JNI provides a rich set of accessor functions on global and local references. This means that the same native method implementation works no matter how the VM represents Java objects internally. This is a crucial reason why the JNI can be supported by a wide variety...
(char)0is encoded using the two-byte format rather than the one-byte format. This means that modified UTF-8 strings never have embedded nulls. Second, only the one-byte, two-byte, and three-byte formats of standard UTF-8 are used. The Java VM does not recognize the four-byte format ...
The latter approach is very flexible, as it enables the UI to be defined by means of a series of hyperlinked HTML (“Web”) pages. There is also the option of making the pages smart by using scripting (like JavaScript) or even the Java language. An HTTP server really requires a real-...
an interface decouples a class from the clients that use it. This means an interface must be implemented by one or more classes in order to be useful. Once an interface has been implemented by a class, a client can create an object from the class and communicate with it through an interf...
Text-based, this means there is no structured data likePackageInfoin Java. You have to parse the output text. It is much slower because run a command means at least one new process is started. AndPackageManager#getInstalledApplicationsis used insidepm list. ...