Java中的FloatBuffer compact()方法
可以使用compact()
类java.nio.FloatBuffer中的方法压缩缓冲区。此方法不需要参数,它返回的新压缩FloatBuffer的内容与原始缓冲区相同。如果缓冲区是只读的,则抛出ReadOnlyBufferException。
演示此的程序如下所示-
示例
import java.nio.*; import java.util.*; public class Demo { public static void main(String[] args) { int n = 5; try { FloatBuffer buffer = FloatBuffer.allocate(n); buffer.put(1.2F); buffer.put(3.9F); buffer.put(7.5F); System.out.println("The Original FloatBuffer is: " + Arrays.toString(buffer.array())); System.out.println("The position is: " + buffer.position()); System.out.println("The limit is: " + buffer.limit()); FloatBuffer bufferCompact = buffer.compact(); System.out.println("\nThe Compacted FloatBuffer is: " + Arrays.toString(bufferCompact.array())); System.out.println("The position is: " + bufferCompact.position()); System.out.println("The limit is: " + bufferCompact.limit()); } catch (IllegalArgumentException e) { System.out.println("Error!!! IllegalArgumentException"); } catch (ReadOnlyBufferException e) { System.out.println("Error!!! ReadOnlyBufferException"); } } }
上面程序的输出如下-
输出结果
The Original FloatBuffer is: [1.2, 3.9, 7.5, 0.0, 0.0] The position is: 3 The limit is: 5 The Compacted FloatBuffer is: [0.0, 0.0, 7.5, 0.0, 0.0] The position is: 2 The limit is: 5