Java 中的 ByteBuffer get() 方法
java 8object oriented programmingprogramming
使用 java.nio.ByteBuffer 类中的 get() 方法读取缓冲区当前位置的值,然后将其递增。此方法返回当前缓冲区位置的值。此外,如果发生下溢情况,则会抛出 BufferUnderflowException。
下面给出了一个演示此操作的程序 −
示例
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("
The 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
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