ByteBuffer mark() methods in Java with Examples

Last Updated : 27 Jun, 2019

The mark() method of java.nio.ByteBuffer Class is used to set this buffer's mark at its position. Syntax:

public ByteBuffer mark()

Return Value: This method returns this buffer. Below are the examples to illustrate the mark() method: Examples 1:

Output:

position before reset: 4
position after reset: 2

Examples 2: To demonstrate InvalidMarkException

Output:

position before reset: 1

new position is less than the position we marked before 
Exception throws: java.nio.InvalidMarkException

Reference: https://docs.oracle.com/javase/9/docs/api/java/nio/ByteBuffer.html#mark--

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