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Java PushbackInputStream skip() Method with Example

PushbackInputStream Class skip() method: Here, we are going to learn about the skip() method of PushbackInputStream Class with its syntax and example.
Submitted by Preeti Jain, on April 20, 2020

PushbackInputStream Class skip() method

  • skip() method is available in java.io package.
  • 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() 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() method may throw an exception at the time of skipping bytes of data.
    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.

Syntax:

    public long skip(long number);

Parameter(s):

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

Return value:

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

Example:

// 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

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






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