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ByteBuffer putLong() methods in Java with Examples

Last Updated : 6 Feb, 2023

putLong(int value)

The putLong(int value) method of java.nio.ByteBuffer Class is used to write eight bytes containing the given long value, in the current byte order, into this buffer at the current position, and then increments the position by eight. 

Syntax:

public abstract ByteBuffer putLong(long value)

Parameters: This method takes a long value to be written. 

Return Value: This method returns this buffer. 

Exception: This method throws the following exceptions:

  • BufferOverflowException- If this buffer's current position is not smaller than its limit
  • ReadOnlyBufferException- If this buffer is read-only

Below are the examples to illustrate the putLong(long value) method: 

Example 1: 

Output:
Original ByteBuffer: [ 23 24 30 ]

Example 2: To demonstrate BufferOverflowException. 

Output:
Original ByteBuffer: [ 23 24 30 ]

buffer's current position is not smaller than its limit
Exception throws : java.nio.BufferOverflowException

Examples 3: To demonstrate ReadOnlyBufferException. 

Output:
Original ByteBuffer: [ 23 24 30 ]

Trying to put the long value in read only buffer
Exception throws : java.nio.ReadOnlyBufferException

putLong(int index, long value)

The putLong(int index, long value) method of java.nio.ByteBuffer Class is used to write eight bytes containing the given eight-byte value, in the current byte order, into this buffer at the given index. 

Syntax:

public abstract ByteBuffer putLong(int index, long value)

Parameters: This method takes the following arguments as a parameter:

  • index: The index at which the byte will be written
  • value: The int value to be written

Return Value: This method returns this buffer. 

Exception: This method throws the following exception:

  • IndexOutOfBoundsException- If index is negative or not smaller than the buffer's limit
  • ReadOnlyBufferException- If this buffer is read-only

Below are the examples to illustrate the putLong(int index, long value) method: 

Example 1: 

Output:
Original ByteBuffer: [ 23 34 27 ]

Example 2: To demonstrate IndexOutOfBoundsException. 

Output:
Original ByteBuffer: [ 23 34 27 ]

index is negative or not smaller than the buffer's limit
Exception throws : java.lang.IndexOutOfBoundsException

Example 3: To demonstrate ReadOnlyBufferException. 

Output:
Trying to put the long value in read only buffer
Exception throws : java.nio.ReadOnlyBufferException

Reference:

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