ByteBuffer putDouble() methods in Java with Examples
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
import java.nio.*;
import java.util.*;
public class GFG {
public static void main(String[] args)
{
int capacity = 24 ;
try {
ByteBuffer bb = ByteBuffer.allocate(capacity);
bb.putDouble( 23.4 )
.putDouble( 234.5 )
.putDouble( 34.56 )
.rewind();
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
import java.nio.*;
import java.util.*;
public class GFG {
public static void main(String[] args)
{
int capacity = 24 ;
try {
ByteBuffer bb = ByteBuffer.allocate(capacity);
bb.putDouble( 23.4 )
.putDouble( 234.5 )
.putDouble( 34.56 )
.rewind();
System.out.print("Original ByteBuffer: [ ");
for ( int i = 1 ; i <= capacity / 8 ; i++)
System.out.print(bb.getDouble() + " ");
System.out.print("]");
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
import java.nio.*;
import java.util.*;
public class GFG {
public static void main(String[] args)
{
int capacity = 24 ;
try {
ByteBuffer bb = ByteBuffer.allocate(capacity);
bb.putDouble( 23.4 )
.putDouble( 234.5 )
.putDouble( 34.56 )
.rewind();
System.out.print("Original ByteBuffer: [ ");
for ( int i = 1 ; i <= capacity / 8 ; i++)
System.out.print(bb.getDouble() + " ");
System.out.print("]");
ByteBuffer bb1 = bb.asReadOnlyBuffer();
System.out.println("\n\nTrying to put the char value"
+ " in read-only buffer");
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
import java.nio.*;
import java.util.*;
public class GFG {
public static void main(String[] args)
{
int capacity = 24 ;
try {
ByteBuffer bb = ByteBuffer.allocate(capacity);
bb.putDouble( 0 , 23.45 );
bb.putDouble( 8 , 34.56 );
bb.putDouble( 16 , 27.56 );
bb.rewind();
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
import java.nio.*;
import java.util.*;
public class GFG {
public static void main(String[] args)
{
int capacity = 24 ;
try {
ByteBuffer bb = ByteBuffer.allocate(capacity);
bb.putDouble( 0 , 23.45 );
bb.putDouble( 8 , 34.56 );
bb.putDouble( 16 , 27.56 );
bb.rewind();
System.out.print("Original ByteBuffer: [ ");
for ( int i = 1 ; i <= capacity / 8 ; i++)
System.out.print(bb.getDouble() + " ");
System.out.print("]\n");
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
import java.nio.*;
import java.util.*;
public class GFG {
public static void main(String[] args)
{
int capacity = 8 ;
try {
ByteBuffer bb = ByteBuffer.allocate(capacity);
ByteBuffer bb1 = bb.asReadOnlyBuffer();
System.out.println("Trying to put the byte value"
+ " in read-only buffer");
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
Reference:
Last Updated :
17 Jan, 2023
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