Question

Im trying to read a whole text file with a method i created. All the lines of the text file does get printed out as i wanted but the very last line of the file when its printed appears as null when its printed out.

private void readFile(String Path) throws IOException{
    String text = ""; //String used in the process of reading a file

    //The file reader
    BufferedReader input = new BufferedReader(
            new FileReader(Path));

    //Creating a new string builder.
    StringBuilder stringBuilder = new StringBuilder();

    while(text != null)
    {
        //Read the next line
        text = input.readLine();

        stringBuilder.append(text); //Adds line of text into the String Builder
        stringBuilder.append(newLine); //Adds a new line using the newLine string
    } 

    //Sets the text that was created with the stringBuilder
    SetText(stringBuilder.toString());
}

All the files gets printed out 100% as they should except the method adds an extra line at the bottom that says “null” How would i write code so this line wont appear at all?

Answer 1

Your loop exit condition is in the wrong place.

while ((text = input.readLine()) != null) {
    stringBuilder.appendText(text)
    ...