Java 中的 CharBuffer compact() 方法
可以通过 java.nio.CharBuffer 类中的 compact() 方法压缩缓冲区。此方法不需要参数,它返回与原始缓冲区具有相同内容的新压缩 CharBuffer。如果缓冲区是只读的,则会抛出 ReadOnlyBufferException。
演示此方法的程序如下所示 -
示例
import java.nio.*; import java.util.*; public class Demo { public static void main(String[] args) { int n = 5; try { 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("
The 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
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
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