31 lines
795 B
Java
31 lines
795 B
Java
// newio/FileLocking.java
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// (c)2021 MindView LLC: see Copyright.txt
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// We make no guarantees that this code is fit for any purpose.
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// Visit http://OnJava8.com for more book information.
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import java.nio.channels.*;
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import java.util.concurrent.*;
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import java.io.*;
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public class FileLocking {
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public static void main(String[] args) {
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try(
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FileOutputStream fos =
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new FileOutputStream("file.txt");
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FileLock fl = fos.getChannel().tryLock()
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) {
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if(fl != null) {
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System.out.println("Locked File");
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TimeUnit.MILLISECONDS.sleep(100);
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fl.release();
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System.out.println("Released Lock");
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}
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} catch(IOException | InterruptedException e) {
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throw new RuntimeException(e);
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}
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}
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}
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/* Output:
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Locked File
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Released Lock
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*/
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