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:
Java
// Java program to demonstrate// putDouble() methodimport java.nio.*;import java.util.*;public class GFG { public static void main(String[] args) { // Declaring the capacity of the ByteBuffer int capacity = 24; // Creating the ByteBuffer try { // creating object of ByteBuffer // and allocating size capacity ByteBuffer bb = ByteBuffer.allocate(capacity); // putting the value in ByteBuffer // using putDouble() method bb.putDouble(23.4) .putDouble(234.5) .putDouble(34.56) .rewind(); // print the ByteBuffer System.out.print("Original ByteBuffer: [ "); for (int i = 1; i <= capacity / 8; i++) System.out.print(bb.getDouble() + " "); System.out.print("]"); } catch (BufferOverflowException e) { System.out.println("Exception throws : " + e); } catch (ReadOnlyBufferException e) { System.out.println("Exception throws : " + e); } }} |
Output:
Original ByteBuffer: [ 23.4 234.5 34.56 ]
Example 2: To demonstrate BufferOverflowException.
Java
// Java program to demonstrate// putDouble() methodimport java.nio.*;import java.util.*;public class GFG { public static void main(String[] args) { // Declaring the capacity of the ByteBuffer int capacity = 24; // Creating the ByteBuffer try { // creating object of ByteBuffer // and allocating size capacity ByteBuffer bb = ByteBuffer.allocate(capacity); // putting the value in ByteBuffer // using putDouble() method bb.putDouble(23.4) .putDouble(234.5) .putDouble(34.56) .rewind(); // print the ByteBuffer System.out.print("Original ByteBuffer: [ "); for (int i = 1; i <= capacity / 8; i++) System.out.print(bb.getDouble() + " "); System.out.print("]"); // putting the value in ByteBuffer // using putDouble() method bb.putDouble(234.55); } catch (BufferOverflowException e) { System.out.println("\n\nbuffer's current position" + " is not smaller than" + " its limit"); System.out.println("Exception throws : " + e); } catch (ReadOnlyBufferException e) { System.out.println("Exception throws : " + e); } }} |
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.
Java
// Java program to demonstrate// putDouble() methodimport java.nio.*;import java.util.*;public class GFG { public static void main(String[] args) { // Declaring the capacity of the ByteBuffer int capacity = 24; // Creating the ByteBuffer try { // creating object of ByteBuffer // and allocating size capacity ByteBuffer bb = ByteBuffer.allocate(capacity); // putting the value in ByteBuffer // using putDouble() method bb.putDouble(23.4) .putDouble(234.5) .putDouble(34.56) .rewind(); // print the ByteBuffer System.out.print("Original ByteBuffer: [ "); for (int i = 1; i <= capacity / 8; i++) System.out.print(bb.getDouble() + " "); System.out.print("]"); // Creating a read-only copy of ByteBuffer // using asReadOnlyBuffer() method ByteBuffer bb1 = bb.asReadOnlyBuffer(); System.out.println("\n\nTrying to put the char value" + " in read-only buffer"); // putting the value in readonly ByteBuffer // using putDouble() method bb1.putDouble(234.5); } catch (BufferOverflowException e) { System.out.println("Exception throws : " + e); } catch (ReadOnlyBufferException e) { System.out.println("Exception throws : " + e); } }} |
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:
Java
// Java program to demonstrate// putDouble() methodimport java.nio.*;import java.util.*;public class GFG { public static void main(String[] args) { // Declaring the capacity of the ByteBuffer int capacity = 24; // Creating the ByteBuffer try { // creating object of ByteBuffer // and allocating size capacity ByteBuffer bb = ByteBuffer.allocate(capacity); // putting the value in ByteBuffer // using putDouble() at index 0 bb.putDouble(0, 23.45); // putting the value in ByteBuffer // using putDouble() at index 8 bb.putDouble(8, 34.56); // putting the value in ByteBuffer // using putDouble() at index 16 bb.putDouble(16, 27.56); // rewinding the ByteBuffer bb.rewind(); // print the ByteBuffer System.out.print("Original ByteBuffer: [ "); for (int i = 1; i <= capacity / 8; i++) System.out.print(bb.getDouble() + " "); System.out.print("]\n"); } catch (IndexOutOfBoundsException e) { System.out.println("Exception throws : " + e); } catch (ReadOnlyBufferException e) { System.out.println("Exception throws : " + e); } }} |
Output:
Original ByteBuffer: [ 23.45 34.56 27.56 ]
Example 2: To demonstrate IndexOutOfBoundsException.
Java
// Java program to demonstrate// putDouble() methodimport java.nio.*;import java.util.*;public class GFG { public static void main(String[] args) { // Declaring the capacity of the ByteBuffer int capacity = 24; // Creating the ByteBuffer try { // creating object of ByteBuffer // and allocating size capacity ByteBuffer bb = ByteBuffer.allocate(capacity); // putting the value in ByteBuffer // using putDouble() at index 0 bb.putDouble(0, 23.45); // putting the value in ByteBuffer // using putDouble() at index 8 bb.putDouble(8, 34.56); // putting the value in ByteBuffer // using putDouble() at index 16 bb.putDouble(16, 27.56); // rewinding the ByteBuffer bb.rewind(); // print the ByteBuffer System.out.print("Original ByteBuffer: [ "); for (int i = 1; i <= capacity / 8; i++) System.out.print(bb.getDouble() + " "); System.out.print("]\n"); // putting the value in ByteBuffer // using putDouble() at index -1 bb.putDouble(-1, 45.67); } catch (IndexOutOfBoundsException e) { System.out.println("\nindex is negative or not smaller " + "than the buffer's limit"); System.out.println("Exception throws : " + e); } catch (ReadOnlyBufferException e) { System.out.println("Exception throws : " + e); } }} |
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.
Java
// Java program to demonstrate// putDouble() methodimport java.nio.*;import java.util.*;public class GFG { public static void main(String[] args) { // Declaring the capacity of the ByteBuffer int capacity = 8; // Creating the ByteBuffer try { // creating object of ByteBuffer // and allocating size capacity ByteBuffer bb = ByteBuffer.allocate(capacity); // Creating a read-only copy of ByteBuffer // using asReadOnlyBuffer() method ByteBuffer bb1 = bb.asReadOnlyBuffer(); System.out.println("Trying to put the byte value" + " in read-only buffer"); // putting the value in readonly ByteBuffer // using putDouble() method bb1.putDouble(0, 'a'); } catch (IndexOutOfBoundsException e) { System.out.println("Exception throws : " + e); } catch (ReadOnlyBufferException e) { System.out.println("Exception throws : " + e); } }} |
Output:
Trying to put the byte value in read-only buffer Exception throws : java.nio.ReadOnlyBufferException
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