Java PushbackInputStream示例

PushbackInputStream将功能添加到另一个输入流以推回或读取一个字节。 PushbackInputStream类的read()方法从输入流中读取一个字节，而unread()方法将一个字节推回输入流。

下面是一个演示如何使用PushbackInputStream类的例子。

文件：PushbackInputStreamExample.java –

package com.yiibai.tutorial.io;  import java.io.ByteArrayInputStream; import java.io.IOException; import java.io.PushbackInputStream;  /**  * @author yiibai  */ public class PushbackInputStreamExample {     public static void main(String[] args) {         String data = "This an example of PushbackInputStream";          ByteArrayInputStream byteArrayInputStream = null;         PushbackInputStream pushbackInputStream = null;         try {             byteArrayInputStream = new ByteArrayInputStream(data.getBytes());             pushbackInputStream = new PushbackInputStream(byteArrayInputStream);              //Read first character from stream             int i=pushbackInputStream.read();             System.out.println((char)i);              //Push back first character to stream             pushbackInputStream.unread(i);              //Now Read full bytes             byte b[] = new byte[data.getBytes().length];             pushbackInputStream.read(b);             System.out.println(new String(b));          } catch (IOException e) {             e.printStackTrace();         } finally {             try {                 if (pushbackInputStream != null) {                     pushbackInputStream.close();                 }             } catch (IOException e) {                 e.printStackTrace();             }          }     } } 

执行上面示代码，得到以下结果：

T This an example of PushbackInputStream