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

 在线演示

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("
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

更新于: 30-Jul-2019

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