IntBuffer arrayOffset() method in Java Last Updated : 19 Sep, 2018 Comments Improve Suggest changes Like Article Like Report The arrayOffset() method of java.nio.IntBuffer class is used to return the offset within the buffer's backing array of the first element of the buffer. It means that if this buffer is backed by an array, then buffer position p corresponds to array index p + arrayOffset(). Inorder to check whether this buffer has a backing array, hasArray() method can be used. It ensures that this buffer has an accessible backing array. Syntax : public final int arrayOffset() Return Value: This method returns the offset within this buffer's array of the first element of the buffer. Exception: This method throws ReadOnlyBufferException if this buffer is backed by an array but is read-only Below program illustrates the arrayOffset() method. Examples 1: Java // Java program to demonstrate // arrayOffset() method import java.nio.*; import java.util.*; public class GFG { public static void main(String[] args) { // Declaring the capacity of the IntBuffer int capacity = 10; // Creating the IntBuffer try { // creating object of Intbuffer // and allocating size capacity IntBuffer ib = IntBuffer.allocate(capacity); // putting the value in Intbuffer ib.put(8); ib.put(2, 9); // print the IntBuffer System.out.println("IntBuffer: " + Arrays.toString(ib.array())); // print the arrayOffset System.out.println("arrayOffset: " + ib.arrayOffset()); } catch (IllegalArgumentException e) { System.out.println("IllegalArgumentException catched"); } catch (ReadOnlyBufferException e) { System.out.println("Exception throws" + e); } } } Output: IntBuffer: [8, 0, 9, 0, 0, 0, 0, 0, 0, 0] arrayOffset: 0 Examples 2: To demonstrate ReadOnlyBufferException Java // Java program to demonstrate // arrayOffset() method import java.nio.*; import java.util.*; public class GFG { public static void main(String[] args) { // Declaring the capacity of the IntBuffer int capacity = 10; // Creating the IntBuffer try { // creating object of Intbuffer // and allocating size capacity IntBuffer ib = IntBuffer.allocate(capacity); // putting the value in Intbuffer ib.put(8); ib.put(2, 9); ib.rewind(); // Creating a read-only copy of IntBuffer // using asReadOnlyBuffer() method IntBuffer ib1 = ib.asReadOnlyBuffer(); // print the IntBuffer System.out.print("Read only buffer : "); while (ib1.hasRemaining()) System.out.print(ib1.get() + ", "); // next line System.ou(t.println(""); // print the arrayOffset System.out.println("\nTry to print the array offset" + " of read only buffer"); System.out.println("arrayOffset: " + ib1.arrayOffset()); } catch (IllegalArgumentException e) { System.out.println("Exception throws: " + e); } catch (ReadOnlyBufferException e) { System.out.println("Exception throws: " + e); } } } Output: Read only buffer : 8, 0, 9, 0, 0, 0, 0, 0, 0, 0, Try to print the array offset of read only buffer Exception throws: java.nio.ReadOnlyBufferException Comment More infoAdvertise with us Next Article IntBuffer arrayOffset() method in Java nitin_sharma Follow Improve Article Tags : Misc Java Java-Functions Java-IntBuffer Java-NIO package +1 More Practice Tags : JavaMisc Similar Reads IntBuffer array() method in Java The array() method of java.nio.IntBuffer Class is used to Return the int array that backs this buffer. 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