Java I/O - 如何存储和读取一个字符数组

import java.nio.ByteBuffer;

public class MainClass {
  private static final int BSIZE = 1024;

  public static void main(String[] args) {
    ByteBuffer bb = ByteBuffer.allocate(BSIZE);
    bb.asCharBuffer().put("Howdy!");
    char c;
    while ((c = bb.getChar()) != 0)
      System.out.print(c + " ");
    System.out.println();

  }
}