DoubleBuffer put() methods in Java with Examples | Set 1

put(double f)

The put(double f) method of java.nio.DoubleBuffer Class is used to write the given double into the newly created double buffer at the current position, and then increments the position.

Syntax:

public abstract DoubleBuffer put(double f)

Parameters: This method takes the double value f as a parameter which is to be written in double buffer.

Return Value: This method returns this buffer, in which the double value is inserted.

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 put(double f) method:

Example 1:

// Java program to demonstrate
// put() method

import java.nio.*;
import java.util.*;

public class GFG {
    public static void main(String[] args)
    {

        // Declaring the capacity of the DoubleBuffer
        int capacity = 3;

        // Creating the DoubleBuffer
        try {

            // creating object of Doublebuffer
            // and allocating size capacity
            DoubleBuffer db = DoubleBuffer.allocate(capacity);

            // putting the value in Doublebuffer using put() method
            db.put(8.56D);
            db.put(9.61D);
            db.put(7.86D);
            db.rewind();

            // print the DoubleBuffer
            System.out.println("Original DoubleBuffer:  "
                               + Arrays.toString(db.array()));
        }

        catch (BufferOverflowException e) {

            System.out.println("Exception throws : " + e);
        }

        catch (ReadOnlyBufferException e) {

            System.out.println("Exception throws : " + e);
        }
    }
}

Output:

Original DoubleBuffer:  [8.56, 9.61, 7.86]

Example 2: To demonstrate BufferOverflowException.

// Java program to demonstrate
// put() method

import java.nio.*;
import java.util.*;

public class GFG {
    public static void main(String[] args)
    {

        // Declaring the capacity of the DoubleBuffer
        int capacity = 3;

        // Creating the DoubleBuffer
        try {

            // creating object of Doublebuffer
            // and allocating size capacity
            DoubleBuffer db = DoubleBuffer.allocate(capacity);

            // putting the value in Doublebuffer using put() method
            db.put(8.56F);
            db.put(9.61F);
            db.put(7.86F);

            System.out.println("Trying to put the Double at the "
                               + "position more than its limit");
            db.put(7.86F);

            // rewind the Doublebuffer
            db.rewind();

            // print the DoubleBuffer
            System.out.println("Original DoubleBuffer:  "
                               + Arrays.toString(db.array()));
        }

        catch (BufferOverflowException e) {

            System.out.println("Exception throws : " + e);
        }

        catch (ReadOnlyBufferException e) {

            System.out.println("Exception throws : " + e);
        }
    }
}

Output:

Trying to put the Double at the position more than its limit
Exception throws : java.nio.BufferOverflowException

Examples 3: To demonstrate ReadOnlyBufferException.

// Java program to demonstrate
// put() method

import java.nio.*;
import java.util.*;

public class GFG {
    public static void main(String[] args)
    {

        // Declaring the capacity of theDoubleBuffer
        int capacity = 3;

        // Creating theDoubleBuffer
        try {

            // creating object ofDoublebuffer
            // and allocating size capacity using allocate() method
            DoubleBuffer db = DoubleBuffer.allocate(capacity);

            // Creating a read-only copy ofDoubleBuffer
            // using asReadOnlyBuffer() method
            DoubleBuffer db1 = db.asReadOnlyBuffer();

            System.out.println("Trying to put theDouble value"
                               + " in read only buffer");

            // putting the value in readonlyDoublebuffer
            // using put() method
            db1.put(8.56F);
        }

        catch (BufferOverflowException e) {

            System.out.println("Exception throws : " + e);
        }

        catch (ReadOnlyBufferException e) {

            System.out.println("Exception throws : " + e);
        }
    }
}

Output:

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

put(int index, double f)

The put(int index, double f) method of java.nio.DoubleBuffer Class is used to write the given double into the buffer at the given index.

Syntax:

public abstract DoubleBuffer put(int index, double f)

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

• index: The index at which the double will be written
• f: The double value to be written

Return Value: This method returns the 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 f) method:

Example 1:

// Java program to demonstrate
// put() method

import java.nio.*;
import java.util.*;

public class GFG {

    public static void main(String[] args)
    {

        // Declaring the capacity of the DoubleBuffer
        int capacity = 3;

        // Creating the DoubleBuffer
        try {

            // creating object of Doublebuffer
            // and allocating size capacity
            DoubleBuffer db = DoubleBuffer.allocate(capacity);

            // putting the value in Doublebuffer using put() at  index 0
            db.put(0, 8.56F);

            // putting the value in Doublebuffer using put() at  index 2
            db.put(2, 9.61F);

            // putting the value in Doublebuffer using put() at  index 1
            db.put(1, 7.86F);

            // rewinding the Doublebuffer
            db.rewind();

            // print the DoubleBuffer
            System.out.println("Original DoubleBuffer:  "
                               + Arrays.toString(db.array()));
        }

        catch (IndexOutOfBoundsException e) {

            System.out.println("Exception throws : " + e);
        }

        catch (ReadOnlyBufferException e) {

            System.out.println("Exception throws : " + e);
        }
    }
}

Output:

Original DoubleBuffer:  [8.5600004196167, 7.860000133514404, 9.609999656677246]

Example 2: To demonstrate IndexOutOfBoundsException.

// Java program to demonstrate
// put() method

import java.nio.*;
import java.util.*;

public class GFG {

    public static void main(String[] args)
    {

        // Declaring the capacity of the DoubleBuffer
        int capacity = 3;

        // Creating the DoubleBuffer
        try {

            // creating object of Doublebuffer
            // and allocating size capacity
            DoubleBuffer db = DoubleBuffer.allocate(capacity);

            // putting the value in Doublebuffer
            // using put() at  index 0
            db.put(0, 8.56F);

            // putting the value in Doublebuffer
            // using put() at  index 2
            db.put(2, 9.61F);

            // putting the value in Doublebuffer
            // using put() at  index -1
            System.out.println("Trying to put the value"
                               + " at the negative index");
            db.put(-1, 7.86F);
        }

        catch (IndexOutOfBoundsException e) {

            System.out.println("Exception throws : " + e);
        }

        catch (ReadOnlyBufferException e) {

            System.out.println("Exception throws : " + e);
        }
    }
}

Output:

Trying to put the value at the negative index
Exception throws : java.lang.IndexOutOfBoundsException

Example 3: To demonstrate ReadOnlyBufferException.

// Java program to demonstrate
// put() method

import java.nio.*;
import java.util.*;

public class GFG {
    public static void main(String[] args)
    {

        // Declaring the capacity of the DoubleBuffer
        int capacity = 3;

        // Creating the DoubleBuffer
        try {

            // creating object of Doublebuffer
            // and allocating size capacity using allocate() method
            DoubleBuffer db = DoubleBuffer.allocate(capacity);

            // Creating a read-only copy of DoubleBuffer
            // using asReadOnlyBuffer() method
            DoubleBuffer db1 = db.asReadOnlyBuffer();

            System.out.println("Trying to put the Double value"
                               + " in read only buffer");

            // putting the value in readonly Doublebuffer
            // using put() method
            db1.put(0, 8.56F);
        }

        catch (BufferOverflowException e) {

            System.out.println("Exception throws : " + e);
        }

        catch (ReadOnlyBufferException e) {

            System.out.println("Exception throws : " + e);
        }
    }
}

Output:

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