Uses of Class java.nio.channels.FileLock (Java Platform SE 8 )
Date: 2026-04-17

## Uses of Class
java.nio.channels.FileLock

- Packages that use FileLock
  Package | Description
  --- | ---
  java.nio.channels | Defines channels, which represent connections to entities that are capable of performing I/O operations, such as files and sockets; defines selectors, for multiplexed, non-blocking I/O operations.

- - ### Uses of FileLock in java.nio.channels

    Methods in java.nio.channels that return FileLock
    Modifier and Type | Method and Description
    --- | ---
    `FileLock` | FileChannel.`lock()` Acquires an exclusive lock on this channel's file.
    `abstract FileLock` | FileChannel.`lock(long position, long size, boolean shared)` Acquires a lock on the given region of this channel's file.
    `FileLock` | AsynchronousFileChannel.`tryLock()` Attempts to acquire an exclusive lock on this channel's file.
    `FileLock` | FileChannel.`tryLock()` Attempts to acquire an exclusive lock on this channel's file.
    `abstract FileLock` | AsynchronousFileChannel.`tryLock(long position, long size, boolean shared)` Attempts to acquire a lock on the given region of this channel's file.
    `abstract FileLock` | FileChannel.`tryLock(long position, long size, boolean shared)` Attempts to acquire a lock on the given region of this channel's file.

    Methods in java.nio.channels that return types with arguments of type FileLock
    Modifier and Type | Method and Description
    --- | ---
    `Future<FileLock>` | AsynchronousFileChannel.`lock()` Acquires an exclusive lock on this channel's file.
    `abstract Future<FileLock>` | AsynchronousFileChannel.`lock(long position, long size, boolean shared)` Acquires a lock on the given region of this channel's file.

    Method parameters in java.nio.channels with type arguments of type FileLock
    Modifier and Type | Method and Description
    --- | ---
    `<A> void` | AsynchronousFileChannel.`lock(A attachment, CompletionHandler<FileLock,? super A> handler)` Acquires an exclusive lock on this channel's file.
    `abstract <A> void` | AsynchronousFileChannel.`lock(long position, long size, boolean shared, A attachment, CompletionHandler<FileLock,? super A> handler)` Acquires a lock on the given region of this channel's file.

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