The equals() method of java.nio.DoubleBuffer Class is used to check whether or not the given buffer is equal to another object.
Two double buffers are equal if, and only if,
- They have the same element type,
- They have the same number of remaining elements, and
- The two sequences of remaining elements, considered independently of their starting positions, are pointwise
equal.
This method considers two double elements a and b to be equal if (a == b) || (Double.isNaN(a) && Double.isNaN(b)). The values -0.0 and +0.0 are considered to be equal, unlike Double.equals(Object).
A double buffer is not equal to any other type of object.
Syntax:
public boolean equals(Object ob)
Parameters: This method takes the ob, the object to which this buffer is to be compared, as a parameter.
Return Value: This method returns true if, and only if, this buffer is equal to the given object.
Below are the examples to illustrate the equals() method:
Example 1:
// Java program to demonstrate// equals() method  import java.nio.*;import java.util.*;  public class GFG {      public static void main(String[] args)    {          // Declaring the capacity of the DoubleBuffer 1        int capacity1 = 10;          // Declaring the capacity of the DoubleBuffer 2        int capacity2 = 10;          // Creating the DoubleBuffer        try {              // creating object of Doublebuffer 1            // and allocating size capacity            DoubleBuffer db1 = DoubleBuffer.allocate(capacity1);              // creating object of Doublebuffer 2            // and allocating size capacity            DoubleBuffer db2 = DoubleBuffer.allocate(capacity2);              // putting the value in Doublebuffer 1            db1.put(8.56F);            db1.put(2, 9.61F);            db1.rewind();              // putting the value in Doublebuffer 2            db2.put(8.56F);            db2.put(2, 9.61F);            db2.rewind();              // print the DoubleBuffer 1            System.out.println(" DoubleBuffer 1: "                               + Arrays.toString(db1.array()));              // print the DoubleBuffer 2            System.out.println(" DoubleBuffer 2: "                               + Arrays.toString(db2.array()));              // checking the equality of both DoubleBuffer            boolean dbb = db1.equals(db2);              // checking if else condition            if (dbb)                System.out.println("both are equal");            else                System.out.println("both are not equal");        }          catch (IllegalArgumentException e) {            System.out.println("IllegalArgumentException catched");        }          catch (ReadOnlyBufferException e) {            System.out.println("ReadOnlyBufferException catched");        }    }} |
Output:
DoubleBuffer 1: [8.5600004196167, 0.0, 9.609999656677246, 0.0, 0.0, 0.0, 0.0, 0.0, 0.0, 0.0] DoubleBuffer 2: [8.5600004196167, 0.0, 9.609999656677246, 0.0, 0.0, 0.0, 0.0, 0.0, 0.0, 0.0] both are equal
Example 1:
// Java program to demonstrate// equals() method  import java.nio.*;import java.util.*;  public class GFG {      public static void main(String[] args)    {          // Declaring the capacity of the DoubleBuffer 1        int capacity1 = 10;          // Declaring the capacity of the DoubleBuffer 2        int capacity2 = 5;          // Creating the DoubleBuffer        try {              // creating object of Doublebuffer 1            // and allocating size capacity            DoubleBuffer db1 = DoubleBuffer.allocate(capacity1);              // creating object of Doublebuffer 2            // and allocating size capacity            DoubleBuffer db2 = DoubleBuffer.allocate(capacity2);              // putting the value in Doublebuffer 1            db1.put(8.56F);            db1.put(2, 9.61F);            db1.rewind();              // putting the value in Doublebuffer 2            db2.put(8.56F);            db2.put(2, 9.61F);            db2.rewind();              // print the DoubleBuffer 1            System.out.println(" DoubleBuffer 1: "                               + Arrays.toString(db1.array()));              // print the DoubleBuffer 2            System.out.println(" DoubleBuffer 2: "                               + Arrays.toString(db2.array()));              // checking the equality of both DoubleBuffer            boolean dbb = db1.equals(db2);              // checking if else condition            if (dbb)                System.out.println("both are equal");            else                System.out.println("both are not equal");        }        catch (IllegalArgumentException e) {              System.out.println("IllegalArgumentException catched");        }          catch (ReadOnlyBufferException e) {              System.out.println("ReadOnlyBufferException catched");        }    }} |
Output:
DoubleBuffer 1: [8.5600004196167, 0.0, 9.609999656677246, 0.0, 0.0, 0.0, 0.0, 0.0, 0.0, 0.0] DoubleBuffer 2: [8.5600004196167, 0.0, 9.609999656677246, 0.0, 0.0] both are not equal
