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This is basically the exact same as Jesus Ramos' answer, except with File instead of FileReader plus iteration to step through the contents of the file.

Scanner in = new Scanner(new File("filename.txt"));

while (in.hasNext()) { // iterates each line in the file
    String line = in.nextLine();
    // do something with line
}

in.close(); // don't forget to close resource leaks

... throws FileNotFoundException

This is basically the exact same as Jesus Ramos' answer, except with File instead of FileReader plus iteration to step through the contents of the file.

Scanner in = new Scanner(new File("filename.txt"));

while (in.hasNext()) { // Iterates each line in the file
    String line = in.nextLine();
    // Do something with line
}

in.close(); // Don't forget to close resource leaks

... throws FileNotFoundException

This is basically the exact same as Jesus Ramos' answer, except with File instead of FileReader plus iteration to step through the contents of the file.

Scanner in = new Scanner(new File("filename.txt"));

while (in.hasNext()) { // iterates each line in the file
    String line = in.nextLine();
    // do something with line
}

... throws FileNotFoundException

This is basically the exact same as Jesus Ramos' answer, except with File instead of FileReader plus iteration to step through the contents of the file.

Scanner in = new Scanner(new File("filename.txt"));

while (in.hasNext()) { // iterates each line in the file
    String line = in.nextLine();
    // do something with line
} 

in.close(); // don't forget to close resource leaks

... throws FileNotFoundException

This is basically the exact same as Jesus Ramos' answer, except with File instead of FileReader plus iteration to step through the contents of the file.

Scanner in = new Scanner(new File("filename.txt"));

while (in.hasNext()) { // iterates each line in the file
    String line = in.nextLine();
    // do something with line
}

... throws IOException

This is basically the exact same as Jesus Ramos' answer, except with File instead of FileReader plus iteration to step through the contents of the file.

Scanner in = new Scanner(new File("filename.txt"));

while (in.hasNext()) { // iterates each line in the file
    String line = in.nextLine();
    // do something with line
}

... throws FileNotFoundException