public class Holder<T>
extends java.lang.Object
A mutable holder class modeled on the JAX-WS 2.0 Holder class that simply provides a common way of providing an in/out parameter without the need to resort to untidy one length array parameters.
This can also be applied to cases where you need a return value back from a inner or local class. Take for example code that requires the use of the Runnable interface, the following code could be used:
final Holder<Integer> h = new Holder<>(3);
SwingUtilities.invokeAndWait(new Runnable()
{
public void run()
{
h.set(doSomethingClever());
}
});
return 9 + h.get();
Ideally in the above exmaple you would use and API that could make
use of the Future interface; but in many
cases API have not been updated.
| Modifier and Type | Method and Description |
|---|---|
T |
get() |
void |
set(T value) |
java.lang.String |
toString() |