PushbackInputStream类skip()方法 (PushbackInputStream Class skip() method)

• skip() method is available in java.io package.

  skip()方法在java.io包中可用。

• skip() method is used to skip the given number of bytes of content from this PushbackInputStream. When the given parameter is less than 0 then no bytes are skipped.

  skip()方法用于从此PushbackInputStream跳过给定数量的内容字节。 当给定参数小于0时，则不跳过任何字节。

• skip() method is a non-static method, it is accessible with the class object only and if we try to access the method with the class name then we will get an error.

  skip()方法是一种非静态方法，只能通过类对象访问，如果尝试使用类名称访问该方法，则会收到错误消息。

• skip() method may throw an exception at the time of skipping bytes of data.

  skip()方法在跳过数据字节时可能会引发异常。

  IOException: This exception may throw when getting any input/output error while performing or stream close by its close() method or stream unsupport seek() method.

  IOException ：在执行过程中或通过其close()方法关闭流或不支持流的seek()方法时，如果遇到任何输入/输出错误，则可能引发此异常。

Syntax:

句法：

    public long skip(long number);

Parameter(s):

参数：

• long number represents the number of bytes to be skipped.

  long number表示要跳过的字节数。

Return value:

返回值：

The return type of the method is long, it returns the exact number of bytes skipped.

该方法的返回类型为long ，它返回跳过的确切字节数。

Example:

例：

// Java program to demonstrate the example 
// of long skip(long number) method of
// PushbackInputStream
import java.io.*;
public class SkipOfPBIS {
public static void main(String[] args) throws Exception {
byte[] b_arr = {
97,
98,
99,
100,
101,
102,
103,
104,
105
};
InputStream is_stm = null;
PushbackInputStream pb_stm = null;
try {
// Instantiates ByteArrayOutputStream and PushbackInputStream
is_stm = new ByteArrayInputStream(b_arr);
pb_stm = new PushbackInputStream(is_stm);
// Loop to read till reach its end
for (int i = 0; i < 4; ++i) {
// By using read() method is to 
// convert byte into char
char ch = (char) pb_stm.read();
System.out.println("ch: " + ch);
// By using skip() method is to
// skip the given byte of data 
// from the stream
long skip = pb_stm.skip(1);
System.out.println("pb_stm.skip(1): " + skip);
}
} catch (Exception ex) {
System.out.println(ex.toString());
} finally {
if (is_stm != null)
is_stm.close();
if (pb_stm != null)
pb_stm.close();
}
}
}

Output

输出量

ch: a
pb_stm.skip(1): 1
ch: c
pb_stm.skip(1): 1
ch: e
pb_stm.skip(1): 1
ch: g
pb_stm.skip(1): 1

翻译自: https://www.includehelp.com/java/pushbackinputstream-skip-method-with-example.aspx