DoubleBuffer reset() methods in Java with Examples

The java.nio.DoubleBuffer has a reset() method. The buffer's position can be reset to the previously marked position by using the DoubleBuffer Class. The mark's value is not altered or removed when this approach is used.

Syntax:

Return value:

The DoubleBuffer buff is returned with its location set to the previously marked place through the DoubleBuffer.reset() method.

Note:

• There is no change in the mark.
• It does not discard the mark.
• An InvalidMarkException exception is raised if the new position is smaller than the position that was marked using the mark() method.

Example 1:

In the code, the marking and resetting functionalities of DoubleBuffer are used. First, two double values are inserted into an 8-size DoubleBuffer that has been allocated. Following the code of b.mark() to mark the current location, which is 2, the position is modified to 4. The position is then returned to the designated position (2) by invoking the reset() function. To illustrate how the reset() method returns the position to the previously marked index, the code shows the buffer's states both before and after resetting.

Implementation:

FileName: BufferResetExample1.java

Output:

 The buffer is given by : [2.6, 5.6, 0.0, 0.0, 0.0, 0.0, 0.0, 0.0] The position marked at is given by: 2 The position (before the reset) is given by : 4 After reset() method The position (after the reset) is given by : 2 

Example 2:

The following code demonstrates how to utilize DoubleBuffer for marking and resetting. It inserts two double values and builds a DoubleBuffer of size 6. It sets the position to 1 after marking the buffer's position, which is 1. The position is returned to the indicated index (1) when reset() is invoked. An InvalidMarkException is raised in the event that the location prior to resetting is smaller than the marked point. To demonstrate how reset() functions and handles exceptions, the code shows the state of the buffer as well as the location before and after resetting.

Implementation:

FileName: BufferResetExample2.java

Output:

 The buffer is given by : [1.7, 4.9, 0.0, 0.0, 0.0, 0.0] The position marked at is given by: 2 The position (before the reset) is given by : 1 After reset() method Exception: java.nio.InvalidMarkException