可以使用java.nio.CharBuffer类中的compact()方法压缩缓冲区。此方法不需要参数,它返回的新压缩CharBuffer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-
import java.nio.*; import java.util.*; public class Demo { public static void main(String[] args) { int n = 5; try { CharBuffer buffer = CharBuffer.allocate(n); buffer.put('A'); buffer.put('B'); buffer.put('C'); System.out.println("The Original CharBuffer is: " + Arrays.toString(buffer.array())); System.out.println("The position is: " + buffer.position()); System.out.println("The limit is: " + buffer.limit()); CharBuffer bufferCompact = buffer.compact(); System.out.println("\nThe Compacted CharBuffer 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"); } } }
输出结果
The Original CharBuffer is: [A, B, C, , ] The position is: 3 The limit is: 5 The Compacted CharBuffer is: [, , C, , ] The position is: 2 The limit is: 5