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DthingApi
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Public Member Functions | |
| String | toString () |
| native boolean | isInstance (Object obj) |
| native boolean | isAssignableFrom (Class<?> cls) |
| native boolean | isInterface () |
| native boolean | isArray () |
| Object | newInstance () throws InstantiationException, IllegalAccessException |
| native InputStream | getResourceAsStream (String resourceName) |
| native String | getName () |
Static Public Member Functions | |
| static native Class<?> | forName (String className) throws ClassNotFoundException |
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static |
Returns the Class object associated with the class with the given string name. Given the fully-qualified name for a class or interface, this method attempts to locate, load and link the class. If it succeeds, returns the Class object representing the class. If it fails, the method throws a ClassNotFoundException.
For example, the following code fragment returns the runtime Class descriptor for the class named java.lang.Thread:
Class t = Class.forName("java.lang.Thread")
| className | the fully qualified name of the desired class. |
Class descriptor for the class with the specified name. | ClassNotFoundException | if the class could not be found. |
| native String java.lang.Class< T >.getName | ( | ) |
Returns the fully-qualified name of the entity (class, interface, array class, primitive type, or void) represented by this Class object, as a String.
If this Class object represents a class of arrays, then the internal form of the name consists of the name of the element type in Java signature format, preceded by one or more "<tt>[</tt>" characters representing the depth of array nesting. Thus:
(new Object[3]).getClass().getName()
returns "<code>[Ljava.lang.Object;</code>" and:
(new int[3][4][5][6][7][8][9]).getClass().getName()
returns "<code>[[[[[[[I</code>". The encoding of element type names is as follows:
B byte C char D double F float I int J long Lclassname; class or interface S short Z boolean
The class or interface name classname is given in fully qualified form as shown in the example above.
| native InputStream java.lang.Class< T >.getResourceAsStream | ( | String | resourceName | ) |
Returns a read-only stream for the contents of the given resource, or null if the resource is not found. The mapping between the resource name and the stream is managed by the class' class loader.
| native boolean java.lang.Class< T >.isArray | ( | ) |
Determines if this Class object represents an array class.
true if this object represents an array class; false otherwise. | native boolean java.lang.Class< T >.isAssignableFrom | ( | Class<?> | cls | ) |
Determines if the class or interface represented by this Class object is either the same as, or is a superclass or superinterface of, the class or interface represented by the specified Class parameter. It returns true if so; otherwise it returns false. If this Class object represents a primitive type, this method returns true if the specified Class parameter is exactly this Class object; otherwise it returns false.
Specifically, this method tests whether the type represented by the specified Class parameter can be converted to the type represented by this Class object via an identity conversion or via a widening reference conversion. See The Java Language Specification, sections 5.1.1 and 5.1.4 , for details.
| cls | the Class object to be checked |
boolean value indicating whether objects of the type cls can be assigned to objects of this class | NullPointerException | if the specified Class parameter is null. |
| native boolean java.lang.Class< T >.isInstance | ( | Object | obj | ) |
Determines if the specified Object is assignment-compatible with the object represented by this Class. This method is the dynamic equivalent of the Java language instanceof operator. The method returns true if the specified Object argument is non-null and can be cast to the reference type represented by this Class object without raising a ClassCastException. It returns false otherwise.
Specifically, if this Class object represents a declared class, this method returns true if the specified Object argument is an instance of the represented class (or of any of its subclasses); it returns false otherwise. If this Class object represents an array class, this method returns true if the specified Object argument can be converted to an object of the array class by an identity conversion or by a widening reference conversion; it returns false otherwise. If this Class object represents an interface, this method returns true if the class or any superclass of the specified Object argument implements this interface; it returns false otherwise. If this Class object represents a primitive type, this method returns false.
| obj | the object to check |
obj is an instance of this class| native boolean java.lang.Class< T >.isInterface | ( | ) |
Determines if the specified Class object represents an interface type.
true if this object represents an interface; false otherwise.
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Creates a new instance of a class.
new expression with an empty argument list. | IllegalAccessException | if the class or initializer is not accessible. |
| InstantiationException | if an application tries to instantiate an abstract class or an interface, or if the instantiation fails for some other reason. |
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inline |
Converts the object to a string. The string representation is the string "class" or "interface", followed by a space, and then by the fully qualified name of the class in the format returned by getName. If this Class object represents a primitive type, this method returns the name of the primitive type. If this Class object represents void this method returns "void".
1.8.13