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...
“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 ...
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....
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...
When a Driver class is loaded, it should create an instance of itself and register it with the DriverManager. This means that a user can load and register a driver by callingtext/java 複製 Class.forName("foo.bah.Driver") Java documentation ...
Implementations of CompletionStage may provide means of achieving such effects, as appropriate. Method #toCompletableFuture enables interoperability among different implementations of this interface by providing a common conversion type. Added in 1.8.
Within a pattern String, "%" means match any substring of 0 or more characters, and "_" means match any one character. Only metadata entries matching the search pattern are returned. If a search pattern argument is set to null, that argument's criterion will be dropped from the search....
(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-...