如何从文件的特定行读取

Question

I have a text file (called data.txt , which has 350 lines)

How can I find the text on a given line of the file? For example:

int imageVariable = 5;
String imageText = nthLineOfFile(imageVariable);
textView1.setText(imageText);

I'm trying to write the String nthLineOfFile(int image) function.

Thanks

Answer 1

You may try this:

String str = FileUtils.readLines(file).get(lineNumber);

or you may use the conventional way by using BufferedReader class:

BufferedReader r = new BufferedReader(new FileReader(file));
for (int i = 0; i < lineNumber - 1; i++)
{
   r.readLine();
}
return r.readLine();

Answer 2

You can use Scanner :

Scanner fileIn = new Scanner(your file);
for (int i = 0; i < lineNum - 1; i++) {
    fileIn.nextLine(); // ignore
}
nthLine = fileIn.nextLine();