CODEWITHSUNDEEP
javanewline
Dev Solanki
Dev Solanki

Reputation: 109

How to check if text stored in file contains new line character(Enter) using java?

I'm trying to read data stored in text file and check if file's data contains new line character or not. For example: if file contains data:

This is first line.
This is second line.

Then my program should say that first line contains new line character.

I tried using 

File file = new File(System.getProperty("user.dir") + File.separator + "test.txt");
BufferedReader bufferedReader = new BufferedReader(new FileReader(file));
String line;
while ((line = bufferedReader.readLine()) != null)
{                       
    char[] arr = line.toCharArray();
    for(char test: arr)
        if(String.valueOf(test) == System.getProperty("line.separator"))
            System.out.println("Contains new line");
}

and I also tried this code

while ((line = bufferedReader.readLine()) != null)
{
    if (line.contains(System.getProperty("line.separator")))
        System.out.println("Contains new line");
}

but to no avail.

My file does contains new line character. In notepad++ if I search for \n or \r\n then it does shows new line character in file. But some how my code is not recognizing it.

Upvotes: 0

Views: 3720

Answers (1)

Zelldon
Zelldon

Reputation: 5516

As you can read from the BufferedReader#readLine JavaDoc

public String readLine()throws IOException

Reads a line of text. A line is considered to be terminated by any one of a line feed ('\n'), a carriage return ('\r'), or a carriage return followed immediately by a linefeed.

Returns:

A String containing the contents of the line, not including any line-termination characters, or null if the end of the stream has been reached

That is why your line has no line endings.

Upvotes: 5

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