Dispose Pattern - Language Constructs

Language Constructs

To make the dispose pattern less verbose, several languages have some kind of built-in support for it:

The C# language features the using statement that automatically calls the Dispose method on an object that implements the IDisposable interface:

using (Resource resource = GetResource) { // Perform actions with the resource. ... }

which is equal to:

Resource resource = GetResource try { // Perform actions with the resource. ... } finally { resource.Finalize; }

Similarly, the Python language has a with statement can be used to similar effect:

with get_resource as resource: # Perform actions with the resource. ...

The Java language introduced a new syntax called try-with-resources in Java version 7. It can be used on objects that implement the AutoCloseable interface (that defines method close):

try ( OutputStream x = new OutputStream(...) ){ //do something with x } catch(IOException ex){ //handle exception } //The resource x is automatically closed