8- The try-with-resources Statement

Jun 18, 2026 04:36 · 2:26 · English · Whisper Turbo · 2 Hökmdarlar

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In this video I'm going to show you a better way to release external resources

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like file handles and database connections.

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First I'm going to delete this ugly finally block,

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that's better.

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Now,

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in Java we can declare and initialize our external resources as

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part of the try statement.

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right after the try keyboard and before the left brace,

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we type a pair of parentheses and inside this parentheses

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we create and initialize our external resources.

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So here we can type var reader equals new file

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reader. Now,

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we delete this line over here and this

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variable declaration over here.

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So this is what we call the try with resources

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statement.

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A try statement that has one or more resource.

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With this structure,

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we don't need to explicitly close this resource inside the

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final block.

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S… Speaker 1 (8- The try-with-resources Statement)

The Java compiler will do that for us.

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S… Speaker 1 (8- The try-with-resources Statement)

So when we compile this code,

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the Java compiler will translate this code to what we had in

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the last video.

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It will add a final block and explicitly close the reader

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object.

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Now,

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for this to work,

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this class should implement the auto -closable interface.

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Let me show you.

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So,

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Here's the documentation for the file reader class.

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Look at the interfaces implemented by this class.

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One of them is auto -closable.

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This interface declares a method

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called close.

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S… Speaker 1 (8- The try-with-resources Statement)

So the close method that we have in the file reader actually comes

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from here.

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S… Speaker 1 (8- The try-with-resources Statement)

So the objects that we create over here should implement

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the auto -closable interface.

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Now we can create multiple objects here.

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Let me show you.

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First I'm going to put this on a new line.

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Now we terminate this statement with a semicolon,

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and then we can create another object.

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New file writer,

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some file.

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Now pay attention to how I have formatted this code.

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I'm following the same convention we have in Java.

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So I put the left bracket right after the

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try keyword,

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and the right bracket over here.

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So this is how we can use the try with resources statement.

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Next I'm going to show you how to throw exceptions in Java.

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