填充和排空缓冲区：一次一个元素。

import java.nio.CharBuffer;


public class Main{

  public static void main(String[] argv) throws Exception {/**来 自 nowjava.com - 时  代  Java**/

    CharBuffer buffer = CharBuffer.allocate(100);


    while (fillBuffer(buffer)) {

      buffer.flip();

      drainBuffer(buffer);

      buffer.clear();

    }

  }


  private static void drainBuffer(CharBuffer buffer) {

    while (buffer.hasRemaining()) {

      System.out.print(buffer.get());

    }

    System.out.println("");

  }
/** from 时代Java公众号**/

  private static boolean fillBuffer(CharBuffer buffer) {

    if (index >= strings.length) {

      return (false);

    }

    String string = strings[index++];

    for (int i = 0; i < string.length(); i++) {

      buffer.put(string.charAt(i));

    }

    return (true);

  }


  private static int index = 0;