What is the legal way to read the data from file txt?

The easiest way is to use the Scanner class in Java and the FileReader object. Simple example: Scanner in = new Scanner(new FileReader(“filename. txt”));

Which object is used for reading from a text file?

A text file can be read using a Scanner object. Using the Scanner offers the advantage of using the methods that come with the Scanner class.

How do I read an existing text file in Java?

There are several ways to read a plain text file in Java e.g. you can use FileReader, BufferedReader, or Scanner to read a text file. Every utility provides something special e.g. BufferedReader provides buffering of data for fast reading, and Scanner provides parsing ability.

How do you remove duplicate lines from a text file in Java?

Java program to delete duplicate lines in text file

1. Create PrintWriter object for output.txt.
2. Open BufferedReader for input.txt.
3. Run a loop for each line of input.txt. 3.1 flag = false. 3.2 Open BufferedReader for output.txt.
4. Check flag, if false. -> write current line of input.txt to output.txt.
5. Close resources.

How do you read a file line by line and write to another file in Java?

Simple Program

1. import java.io.*;
2. class file1 {
3. public static void main(String arg[]) {
4. File inf = new File(“in.dat”);
5. File outf = new File(“out.dat”);
6. FileReader ins = null;
7. FileWriter outs = null;
8. try {

How do I remove duplicates from a text file?

Go to the Tools menu > Scratchpad or press F2. Paste the text into the window and press the Do button. The Remove Duplicate Lines option should already be selected in the drop down by default. If not, select it first.

How do I delete duplicate lines in files?

The uniq command is used to remove duplicate lines from a text file in Linux. By default, this command discards all but the first of adjacent repeated lines, so that no output lines are repeated. Optionally, it can instead only print duplicate lines. For uniq to work, you must first sort the output.

Which of these class is used to read and write bytes in a file?

Explanation: FileStream defines two methods that reads bytes from a file: ReadByte() and Read().

Which of this class contains the method used to write in a file?

Discussion Forum

Que.	Which of these class contains the methods used to write in a file?
b.	FileInputStream
c.	BUfferedOutputStream
d.	FileBufferStream
	Answer:FileInputStream