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How to count the number of characters (including spaces) in a text file using Java?
To count the number of lines in a file
Instantiate the FileInputStream class by passing an object of the required file as parameter to its constructor.
Read the contents of the file to a byte array using the read() method of FileInputStream class.
Instantiate a String class by passing the byte array obtained, as a parameter its constructor.
Finally, find the length of the string.
Example
import java.io.File;
import java.io.FileInputStream;
public class NumberOfCharacters {
public static void main(String args[]) throws Exception{
File file = new File("data");
FileInputStream fis = new FileInputStream(file);
byte[] byteArray = new byte[(int)file.length()];
fis.read(byteArray);
String data = new String(byteArray);
System.out.println("Number of characters in the String: "+data.length());
}
}
data
Output
Number of characters in the String: 3
Updated on: 30-Jul-2019
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