Programming Tutorials

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BufferedReader sample program in Java

By: Charles in Java Tutorials on 2022年09月15日 [フレーム]

BufferedReader is a class in Java that reads text from a character stream with efficiency (characters are buffered to avoid frequently reading from the underlying stream). Here's an example program that reads text from a file using BufferedReader:

import java.io.*;
public class BufferedReaderExample {
 public static void main(String[] args) {
 try (BufferedReader reader = new BufferedReader(new FileReader("example.txt"))) {
 String line;
 while ((line = reader.readLine()) != null) {
 System.out.println(line);
 }
 } catch (IOException e) {
 e.printStackTrace();
 }
 }
}

This program reads text from a file named example.txt using a BufferedReader. It reads each line of text from the file and prints it to the console.

The BufferedReader class has several constructors that can be used to create instances of it:

BufferedReader(Reader in) - creates a BufferedReader that reads text from the given Reader.
BufferedReader(Reader in, int sz) - creates a BufferedReader that reads text from the given Reader with the specified buffer size.
BufferedReader(InputStream in) - creates a BufferedReader that reads text from the given InputStream.
BufferedReader(InputStream in, int sz) - creates a BufferedReader that reads text from the given InputStream with the specified buffer size.