Interface Callable<V>
- Type Parameters:
-
V
- the result type of methodcall
- All Known Subinterfaces:
-
DocumentationTool.DocumentationTask
,JavaCompiler.CompilationTask
- All Known Implementing Classes:
JavacTask
- Functional Interface:
- This is a functional interface and can therefore be used as the assignment target for a lambda expression or method reference.
@FunctionalInterface public interface Callable<V>
A task that returns a result and may throw an exception. Implementors define a single method with no arguments called call
.
The Callable
interface is similar to Runnable
, in that both are designed for classes whose instances are potentially executed by another thread. A Runnable
, however, does not return a result and cannot throw a checked exception.
The Executors
class contains utility methods to convert from other common forms to Callable
classes.
- Since:
- 1.5
- See Also:
Executor
Method Summary
Modifier and Type | Method | Description |
---|---|---|
V | call() | Computes a result, or throws an exception if unable to do so. |
Method Detail
call
V call() throws Exception
Computes a result, or throws an exception if unable to do so.
- Returns:
- computed result
- Throws:
-
Exception
- if unable to compute a result