Created
May 2, 2012 17:31
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try-with-resources in Project Coin Java 7
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import java.io.Closeable; | |
import java.io.IOException; | |
/** | |
* Created by IntelliJ IDEA. | |
* User: mohamed | |
* Date: 2/5/12 | |
* Time: 9:24 PM | |
* To change this template use File | Settings | File Templates. | |
*/ | |
public class TryWIthResourcesDemo { | |
public static void main ( String [] args){ | |
/* | |
Pre Java 7 Approach | |
*/ | |
Resource myResource = null; | |
try{ | |
myResource = new Resource("POOR OLD RESOURCE"); | |
myResource.useResource(); | |
}catch(SomeException ex){ | |
ex.printStackTrace(); | |
}finally { | |
if (myResource != null) { | |
try { | |
myResource.close(); | |
} catch (IOException e) { | |
e.printStackTrace(); | |
} | |
} | |
} | |
/* | |
Java 7 Approach using the try-with-resource construct | |
*/ | |
try ( Resource myResource2 = new Resource("TRY-WITH-RESOURCE")){ | |
myResource2.useResource(); | |
}catch ( SomeException | IOException ex){ | |
ex.printStackTrace(); | |
} | |
} | |
} | |
class Resource implements Closeable{ | |
public String resourceName; | |
public Resource(String resourceName) throws SomeException{ | |
this.resourceName = resourceName; | |
System.out.println(this.resourceName+" created! Might throw an exception"); | |
} | |
public void useResource() { | |
System.out.println("Using the resource "+this.resourceName+"!"); | |
} | |
@Override | |
public void close() throws IOException { | |
System.out.println("Closing the resource "+this.resourceName+"!"); | |
} | |
} | |
class SomeException extends Exception{ | |
} |
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