Reader skip(long) in Java

skip(long): This method is available in the java.io.Reader class of Java.

Syntax:

long java.io.Reader.skip(long n) throws IOException

This method takes one argument. This method skips characters.

This method will block until some characters are available, an I/O error occurs, or the end of the stream is reached.

Parameters: One parameter is required for this method.

n: The number of characters to skip.

Returns: The number of characters actually skipped.

Throws:

1. IllegalArgumentException - If n is negative.

2. IOException - If an I/O error occurs

Approach 1: When no exception

Java

import java.io.IOException;
import java.io.Reader;
import java.io.StringReader;

public class Readerskip {
    public static void main(String[] args) throws IOException {

        Reader reader = new StringReader("HELLO");

        long n = 100;

        System.out.println(reader.skip(n));
        reader.close();

    }
}

Output:

5


Approach 2: IOException 

Java

package com.Reader;

import java.io.IOException;
import java.io.Reader;
import java.io.StringReader;

public class Readerskip {
    public static void main(String[] args) throws IOException {

        Reader reader = new StringReader("HELLO");

        long n = 100;
        reader.close();
        System.out.println(reader.skip(n));

    }
}

Output:

Exception in thread "main" java.io.IOException: Stream closed at java.base/java.io.StringReader.ensureOpen(StringReader.java:56) at java.base/java.io.StringReader.skip(StringReader.java:125) at com.Reader.Readerskip.main(Readerskip.java:14)


Some other methods of Reader

close()This method closes the stream and releases any system resources associated with it.

mark(int)This method marks the present position in the stream.

markSupported()This method tells whether this stream supports the mark() operation. 

Reader.nullReader()This method returns a new Reader that reads no characters.

read()This method reads a single character.

read(char[])This method reads characters into an array.

read(CharBuffer)This method attempts to read characters into the specified character buffer.

read(char[], int, int)This method reads characters into a portion of an array.

ready()This method tells whether this stream is ready to be read.

reset()This method resets the stream.

skip(long)This method skips characters.

transferTo(Writer)This method reads all characters from this reader and writes the characters to the given writer in the order that they are read.

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