public class CheckedInputStream
extends FilterInputStream
| java.lang.Object | |||
| ↳ | java.io.InputStream | ||
| ↳ | java.io.FilterInputStream | ||
| ↳ | java.util.zip.CheckedInputStream | ||
一个输入流，也保持正在读取的数据的校验和。 校验和可以用来验证输入数据的完整性。
也可以看看：
Inherited fields |
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 From class java.io.FilterInputStream
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Public constructors |
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CheckedInputStream(InputStream in, Checksum cksum) 使用指定的校验和创建输入流。 |
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Public methods |
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Checksum |
getChecksum() 返回此输入流的校验和。 |
int |
read() 读取一个字节。 |
int |
read(byte[] buf, int off, int len) 读入一个字节数组。 |
long |
skip(long n) 跳过指定的输入字节数。 |
Inherited methods |
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From class java.io.FilterInputStream
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From class java.io.InputStream
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From class java.lang.Object
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From interface java.io.Closeable
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From interface java.lang.AutoCloseable
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CheckedInputStream (InputStream in, Checksum cksum)
使用指定的校验和创建输入流。
| Parameters | |
|---|---|
in |
InputStream: the input stream |
cksum |
Checksum: the Checksum |
Checksum getChecksum ()
返回此输入流的校验和。
| Returns | |
|---|---|
Checksum |
the Checksum value |
int read ()
读取一个字节。 如果没有输入可用，将会阻止。
| Returns | |
|---|---|
int |
the byte read, or -1 if the end of the stream is reached. |
| Throws | |
|---|---|
IOException |
if an I/O error has occurred |
Android开发手册
int read (byte[] buf,
int off,
int len)
读入一个字节数组。 如果len不为零，则该方法会阻塞，直到某些输入可用; 否则，不读取字节并返回0 。
| Parameters | |
|---|---|
buf |
byte: the buffer into which the data is read |
off |
int: the start offset in the destination array b |
len |
int: the maximum number of bytes read |
| Returns | |
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int |
the actual number of bytes read, or -1 if the end of the stream is reached. |
| Throws | |
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NullPointerException |
If buf is null. |
IndexOutOfBoundsException |
If off is negative, len is negative, or len is greater than buf.length - off |
IOException |
if an I/O error has occurred |
long skip (long n)
跳过指定的输入字节数。
| Parameters | |
|---|---|
n |
long: the number of bytes to skip |
| Returns | |
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long |
the actual number of bytes skipped |
| Throws | |
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IOException |
if an I/O error has occurred |