The array() method of java.nio.LongBuffer Class is used to Return the Long array that backs this buffer. Modifications to this buffer’s content will cause the returned array’s content to be modified, and vice versa. Invoke() the hasArray() method are used before invoking this method in order to ensure that this buffer has an accessible backing array
Syntax :
public final Long[] array()
Return Value: This method returns the array that backs this buffer.
Throws: This method throws the ReadOnlyBufferException(If this buffer is backed by an array but is read-only)
Below program illustrates the array() method:
Examples 1:
// Java program to demonstrate// array() method import java.nio.*;import java.util.*; public class GFG { public static void main(String[] args) { // Declaring the capacity of the LongBuffer int capacity = 10; // Creating the LongBuffer try { // creating object of Longbuffer // and allocating size capacity LongBuffer ib = LongBuffer.allocate(capacity); // putting the value in Longbuffer ib.put(7); ib.put(2, 6); ib.rewind(); // getting array from ib LongBuffer using array() method long[] ibb = ib.array(); // prLonging the LongBuffer ib System.out.println("LongBuffer: " + Arrays.toString(ibb)); } catch (IllegalArgumentException e) { System.out.println("IllegalArgumentException catched"); } catch (ReadOnlyBufferException e) { System.out.println("ReadOnlyBufferException catched"); } }} |
Examples 2:
// Java program to demonstrate// array() method import java.nio.*;import java.util.*; public class GFG { public static void main(String[] args) { // Declaring the capacity of the ib int capacity1 = 10; // Declaring the capacity of the ib1 int capacity2 = 5; // Creating the LongBuffer try { // // ib // // creating object of Longbuffer ib // and allocating size capacity LongBuffer ib = LongBuffer.allocate(capacity1); // putting the value in ib ib.put(7); ib.put(2, 6); ib.put(3, 7); ib.rewind(); // prLong the LongBuffer System.out.println("LongBuffer ib: " + Arrays.toString(ib.array())); // // ib1 // // creating object of Longbuffer ib1 // and allocating size capacity LongBuffer ib1 = LongBuffer.allocate(capacity2); // putting the value in ib1 ib1.put(1, 4); ib1.put(2, 6); ib1.rewind(); // prLong the LongBuffer System.out.println("\nLongBuffer ib1: " + Arrays.toString(ib1.array())); // Creating a read-only copy of LongBuffer // using asReadOnlyBuffer() method LongBuffer readOnlyib = ib.asReadOnlyBuffer(); // prLong the LongBuffer System.out.print("\nReadOnlyBuffer LongBuffer: "); while (readOnlyib.hasRemaining()) System.out.print(readOnlyib.get() + ", "); // try to change readOnlyib System.out.println("\n\nTrying to get the array" + " from ReadOnlyib for editing"); long[] ibarr = readOnlyib.array(); } catch (IllegalArgumentException e) { System.out.println("IllegalArgumentException catched"); } catch (ReadOnlyBufferException e) { System.out.println("Exception thrown: " + e); } }} |
