SharedByteArrayInputStream (Java EE 5)

A ByteArrayInputStream that implements the SharedInputStream interface, allowing the underlying byte array to be shared between multiple readers.

Since:

JavaMail 1.4

Version:

1.5, 07/05/04

Author:

Bill Shannon

英文文档：

start

protected int start

Position within shared buffer that this stream starts at.

public SharedByteArrayInputStream(byte[] buf)
创建一个表示整个 byte 数组的 SharedByteArrayInputStream。

buf

byte 数组

英文文档：

SharedByteArrayInputStream

public SharedByteArrayInputStream(byte[] buf)

Create a SharedByteArrayInputStream representing the entire byte array.

Parameters:

buf - the byte array

public SharedByteArrayInputStream(byte[] buf, int offset, int length)
创建一个表示部分 byte 数组（从 offset 开始的 length 个字节）的 SharedByteArrayInputStream。

buf	byte 数组
offset	byte 数组中距离第一个字节的偏移量
length	要包含的字节数

英文文档：

SharedByteArrayInputStream

public SharedByteArrayInputStream(byte[] buf,
                                  int offset,
                                  int length)

Create a SharedByteArrayInputStream representing the part of the byte array from offset for length bytes.

Parameters:

buf - the byte array

offset - offset in byte array to first byte to include

length - number of bytes to include

public long getPosition()
返回 InputStream 中的当前位置，形式为距 InputStream 开头的偏移量。

return

当前位置

英文文档：

getPosition

public long getPosition()

Return the current position in the InputStream, as an offset from the beginning of the InputStream.

Specified by:

getPosition in interface SharedInputStream

Returns:

the current position

public java.io.InputStream newStream(long start, long end)
返回表示此 InputStream 数据的子集的新 InputStream，从 start（包括）开始，一直到 end（不包括）结束。start 必须为非负数。如果 end 为 -1，则新流的结束位置与此流相同。返回的 InputStream 也将实现 SharedInputStream 接口。

start	起始位置
end	结束位置 + 1
return	新流

英文文档：

newStream

public InputStream newStream(long start,
                             long end)

Return a new InputStream representing a subset of the data from this InputStream, starting at start (inclusive) up to end (exclusive). start must be non-negative. If end is -1, the new stream ends at the same place as this stream. The returned InputStream will also implement the SharedInputStream interface.

Specified by:

newStream in interface SharedInputStream

Parameters:

start - the starting position

end - the ending position + 1

Returns:

the new stream

Copyright 2007 Sun Microsystems, Inc. All rights reserved. Use is subject to license terms.