repository.grepcode.com$java$root@jdk$openjdk@6-b14
repository.grepcode.com$java$root@jdk$openjdk@6-b14@java$lang$reflect$TypeVariable.java
file
oh
o
[]
Java generics are implemented using type erasure. That means that if I have a method:
public void setMapParam(Map<String, Integer> p) { ... }
after compilation, it will end up in the .class as:
public void setMapParam(Map p) { ... }
I have a JAR file with generic classes and methods like the above. It is just the binary. No source code no nothing.
But when I use it in code, Eclips...
I am writing a program that displays the methods inside a Class along with it's access modifier, return type and parameters.
Here's my code
import java.lang.reflect.*;
class RefTest1{
public static void main(String[] args) throws Exception{
Test obj = new Test();
Class<?> c = obj.getClass();
System.out.printf("%n%s fields :-%n", obj.getClass());
...
package java.lang.reflect;
TypeVariable is the common superinterface for type variables of kinds.
A type variable is created the first time it is needed by a reflective
method, as specified in this package. If a type variable t is referenced
by a type (i.e, class, interface or annotation type) T, and T is declared
by the nth enclosing class of T (see JLS 8.1.2), then the creation of t
requires the resolution (see JVMS 5) of the ith enclosing class of T,
for i = 0 to n, inclusive. Creating a type variable must not cause the
creation of its bounds. Repeated creation of a type variable has no effect.
Multiple objects may be instantiated at run-time to
represent a given type variable. Even though a type variable is
created only once, this does not imply any requirement to cache
instances representing the type variable. However, all instances
representing a type variable must be equal() to each other.
As a consequence, users of type variables must not rely on the identity
of instances of classes implementing this interface.
- Parameters:
<D> the type of generic declaration that declared the
underlying type variable.- Since:
- 1.5
Returns an array of
Type objects representing the
upper bound(s) of this type variable. Note that if no upper bound is
explicitly declared, the upper bound is
Object.
For each upper bound B:
- if B is a parameterized
type or a type variable, it is created, (see
ParameterizedType - Otherwise, B is resolved.
Returns the
GenericDeclaration object representing the
generic declaration declared this type variable.
- Returns:
- the generic declaration declared for this type variable.
- Since:
- 1.5
Returns the name of this type variable, as it occurs in the source code.
- Returns:
- the name of this type variable, as it appears in the source code
