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📜  Java.io.ByteArrayInputStream类

📅  最后修改于: 2020-11-15 02:39:09             🧑  作者: Mango

介绍

java.io.ByteArrayInputStream类包含一个内部缓冲区，该缓冲区包含可以从流中读取的字节。内部计数器跟踪read方法要提供的下一个字节。以下是有关ByteArrayInputStream的要点-

  • 关闭ByteArrayInputStream无效。

  • 可以在关闭流之后调用此类中的方法，而不会产生IOException。

类声明

以下是java.io.ByteArrayInputStream类的声明-

public class ByteArrayInputStream
   extends InputStream

领域

以下是java.io.ByteArrayInputStream类的字段-

  • protected byte [] buf-这是流的创建者提供的字节数组。

  • protected int count-这是比输入流缓冲区中的最后一个有效字符大一个的索引。

  • protected int mark-这是流中当前标记的位置。

  • protected int pos-这是要从输入流缓冲区读取的下一个字符的索引。

类的构造函数

Sr.No. Constructor & Description
1

ByteArrayInputStream(byte[] buf)

This creates a ByteArrayInputStream so that it uses buf as its buffer array.
2

ByteArrayInputStream(byte[] buf, int offset, int length)

This creates ByteArrayInputStream that uses buf as its buffer array.

类方法

Sr.No. Method & Description
1 int available()

This method returns the number of remaining bytes that can be read (or skipped over) from this input stream.
2 void close()

Closing a ByteArrayInputStream has no effect.
3 void mark(int readAheadLimit)

This method set the current marked position in the stream.
4 boolean markSupported()

This method tests if this InputStream supports mark/reset.
5 int read()

This method reads the next byte of data from this input stream.
6 int read(byte[] b, int off, int len)

This method reads up to len bytes of data into an array of bytes from this input stream.
7 void reset()

This method resets the buffer to the marked position.
8 long skip(long n)

This method skips n bytes of input from this input stream.

方法继承

此类从以下类继承方法-

  • java.io.InputStream
  • java.io.Object