读取缓冲区当前位置的值,然后使用get()
java.nio.ByteBuffer类中的方法将其递增。此方法返回当前缓冲区位置上的值。另外,如果发生下溢情况,则抛出BufferUnderflowException。
演示此的程序如下所示-
import java.nio.*; import java.util.*; public class Demo { public static void main(String[] args) { int n = 5; try { ByteBuffer buffer = ByteBuffer.allocate(n); buffer.put((byte)1); buffer.put((byte)2); buffer.put((byte)3); buffer.put((byte)4); buffer.put((byte)5); buffer.rewind(); System.out.println("The ByteBuffer is: " + Arrays.toString(buffer.array())); byte val1 = buffer.get(); System.out.println("\nThe value at current position of ByteBuffer is: " + val1); byte val2 = buffer.get(); System.out.println("The value at next position of ByteBuffer is: " + val2); } catch (IllegalArgumentException e) { System.out.println("Error!!! IllegalArgumentException"); } catch (ReadOnlyBufferException e) { System.out.println("Error!!! ReadOnlyBufferException"); } catch (BufferUnderflowException e) { System.out.println("Error!!! BufferUnderflowException"); } } }
输出结果
The ByteBuffer is: [1, 2, 3, 4, 5] The value at current position of ByteBuffer is: 1 The value at next position of ByteBuffer is: 2