Java में BufferedReader और BufferedWriter

// Import java.io.FileWriter so it can be used by its short name
import java.io.FileWriter;
// Import java.io.BufferedWriter so it can be used by its short name
import java.io.BufferedWriter;
import java.io.IOException;
// Define the class Main
public class Main {
	// Program entry point: the JVM starts running here
	public static void main(String[] args) throws IOException {
		// Create a new BufferedWriter object and store it in writer
		BufferedWriter writer = new BufferedWriter(new FileWriter("notes.txt"));
		writer.write("Line one");
		writer.newLine();
		writer.write("Line two");
		writer.close();
		// Print a line to the console
		System.out.println("Written");
	}
}

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// Import java.io.FileWriter so it can be used by its short name
import java.io.FileWriter;
// Import java.io.BufferedReader so it can be used by its short name
import java.io.BufferedReader;
import java.io.FileReader;
import java.io.IOException;
// Define the class Main
public class Main {
	// Program entry point: the JVM starts running here
	public static void main(String[] args) throws IOException {
		// Create a new FileWriter object and store it in writer
		FileWriter writer = new FileWriter("notes.txt");
		writer.write("Hello\nWorld");
		writer.close();
		// Create a new BufferedReader object and store it in reader
		BufferedReader reader = new BufferedReader(new FileReader("notes.txt"));
		String line;
		// Repeat while (line = reader.readLine()) != null is true
		while ((line = reader.readLine()) != null) {
			// Print a line to the console
			System.out.println(line);
		}
		reader.close();
	}
}

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import java.io.FileWriter;
import java.io.BufferedWriter;
import java.io.IOException;
public class Main {
	public static void main(String[] args) throws IOException {
		BufferedWriter writer = new BufferedWriter(new FileWriter("notes.txt"));
		writer.write("Buffered data");
		writer.flush(); // forces it out now
		writer.close();
		System.out.println("Flushed and closed");
	}
}

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// Import java.io.BufferedReader so it can be used by its short name
import java.io.BufferedReader;
// Import java.io.FileReader so it can be used by its short name
import java.io.FileReader;
import java.io.IOException;
// Define the class Main
public class Main {
	// Program entry point: the JVM starts running here
	public static void main(String[] args) {
		// Try code that might throw an exception
		try (BufferedReader reader = new BufferedReader(new FileReader("missing.txt"))) {
			// Print a line to the console
			System.out.println(reader.readLine());
		// Handle IOException if it was thrown
		} catch (IOException e) {
			// Print a line to the console
			System.out.println("Caught: " + e.getClass().getSimpleName());
		}
	}
}

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// Import java.io.FileWriter so it can be used by its short name
import java.io.FileWriter;
// Import java.io.BufferedReader so it can be used by its short name
import java.io.BufferedReader;
import java.io.FileReader;
import java.io.IOException;
// Define the class Main
public class Main {
	// Program entry point: the JVM starts running here
	public static void main(String[] args) throws IOException {
		// Create a new FileWriter object and store it in writer
		FileWriter writer = new FileWriter("numbers.txt");
		writer.write("10\n20\n30");
		writer.close();
		// Create a new BufferedReader object and store it in reader
		BufferedReader reader = new BufferedReader(new FileReader("numbers.txt"));
		// Declare total and set it to 0
		int total = 0;
		String line;
		// Repeat while (line = reader.readLine()) != null is true
		while ((line = reader.readLine()) != null) {
			total += Integer.parseInt(line);
		}
		reader.close();
		System.out.println(total);
	}
}

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