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