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FloatBuffer arrayOffset() method in Java
The offset of the first element of the buffer inside the buffer array is obtained using the method arrayOffset() in the class java.nio.FloatBuffer. If the buffer backed by the array is read-only, then the ReadOnlyBufferException is thrown.
A program that demonstrates this is given as follows −
Example
import java.nio.*; import java.util.*; public class Demo { public static void main(String[] args) { int n = 5; try { FloatBuffer buffer = FloatBuffer.allocate(5); buffer.put(4.5F); buffer.put(1.2F); buffer.put(3.9F); buffer.put(7.5F); buffer.put(5.8F); buffer.rewind(); System.out.println("The FloatBuffer is: " + Arrays.toString(buffer.array())); System.out.println("The arrayOffset is: " + buffer.arrayOffset()); } catch (IllegalArgumentException e) { System.out.println("Error!!! IllegalArgumentException"); } catch (ReadOnlyBufferException e) { System.out.println("Error!!! ReadOnlyBufferException"); } } }
The output of the above program is as follows −
Output
The FloatBuffer is: [4.5, 1.2, 3.9, 7.5, 5.8] The arrayOffset is: 0
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