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📜  Java.io.PushbackReader类

📅  最后修改于: 2020-11-15 02:50:56             🧑  作者: Mango

介绍

Java.io.PushbackReader类是一个字符流阅读器，它允许将字符推回流中。

类声明

以下是Java.io.PushbackReader类的声明-

public class PushbackReader
   extends FilterReader

领域

以下是Java.io.PushbackReader类的字段-

  • −中的受保护的Reader-这是字符输入流。

  • protected Object lock-这是用于同步此流上的操作的对象。

类的构造函数

Sr.No. Constructor & Description
1

PushbackReader(Reader in)

This creates a new pushback reader with a one-character pushback buffer.
2

PushbackReader(Reader in, int size)

This creates a new pushback reader with a pushback buffer of the given size.

类方法

Sr.No. Method & Description
1 void close()

This method closes the stream and releases any system resources associated with it.
2 void mark(int readAheadLimit)

This method marks the present position in the stream.
3 boolean markSupported()

This method tells whether this stream supports the mark() operation, which it does not.
4 int read()

This method reads a single character.
5 int read(char[] cbuf, int off, int len)

This method reads characters into a portion of an array.
6 boolean ready()

This method tells whether this stream is ready to be read.
7 void reset()

This method resets the stream.
8 long skip(long n)

This method skips characters.
9 void unread(char[] cbuf)

This method pushes back an array of characters by copying it to the front of the pushback buffer.
10 void unread(char[] cbuf, int off, int len)

This method pushes back a portion of an array of characters by copying it to the front of the pushback buffer.
11 void unread(int c)

This method pushes back a single character by copying it to the front of the pushback buffer.

方法继承

此类从以下类继承方法-

  • Java.io.Reader
  • Java对象