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ByteBuffer putDouble() methods in Java with Examples

Last Updated : 17 Jan, 2023

putDouble(double value)

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

public abstract ByteBuffer putDouble?(double value)

Parameters: This method takes the double 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 putDouble(double value) method: Example 1: 

Output:
Original ByteBuffer: [ 23.4 234.5 34.56 ]

Example 2: To demonstrate BufferOverflowException. 

Output:
Original ByteBuffer: [ 23.4 234.5 34.56 ]

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

Examples 3: To demonstrate ReadOnlyBufferException. 

Output:
Original ByteBuffer: [ 23.4 234.5 34.56 ]

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

putDouble(int index, double value)

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

public abstract ByteBuffer putDouble(int index, double value)

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

  • index: The index at which the byte will be written
  • value: The double 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 put(int index, double value) method: Example 1: 

Output:
Original ByteBuffer: [ 23.45 34.56 27.56 ]

Example 2: To demonstrate IndexOutOfBoundsException. 

Output:
Original ByteBuffer: [ 23.45 34.56 27.56 ]

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 byte value in read-only buffer
Exception throws : java.nio.ReadOnlyBufferException

Reference:

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