import java.io.*

/**
 * This program reads a text file line by line and prints them to the console. It uses
 * FileReader and BufferedReader to read the file.
 * 
 */
public class FileInput {

	public static void main(String[] args) {
		File file = new File("MyFile.txt");
		FileReader fr = null;
		BufferedReader br = null;
		try {
			fr = new FileReader(file);
			br = new BufferedReader(fr);
			while (br.ready()) { // br.read() returns false when the Buffer is not ready (end of file).
				System.out.println(br.readLine()); // this statement reads a line from the file and prints it to the console (and moves to next line and is "ready" if there IS a next line).
			}
			br.close(); // dispose of the resources after using them.
		}
		catch (FileNotFoundException e) { // File not found.
			e.printStackTrace();
			// Put something here like an error message.
			System.out.println("The file could not be found.");
		}
		catch (IOException e) { // Error with transaction.
			e.printStackTrace();
			// Put something here like an error message.
			System.out.println("There was an error reading the file.");
		}
	}
}

import java.io.*

/**
 * This program reads a text file line by line and print to the console. It uses
 * FileOutputStream to read the file.
 * 
 */
public class FileInput {

	public static void main(String[] args) {
		File file = new File("MyFile.txt");
		FileReader fr = null;
		BufferedReader br = null;
		try {
			fr = new FileReader(file);
			br = new BufferedReader(fr);
			while (br.ready()) { // br.read() returns false when the Buffer is not ready (end of file).
				System.out.println(br.readLine()); // this statement reads a line from the file and prints it to the console (and moves to next line and is "ready" if there IS a next line).
			}
			br.close(); // dispose of the resources after using them.
		}
		catch (FileNotFoundException e) { // File not found.
			e.printStackTrace();
			// Put something here like an error message.
			System.out.println("The file could not be found.");
		}
		catch (IOException e) { // Error with transaction.
			e.printStackTrace();
			// Put something here like an error message.
			System.out.println("There was an error reading the file.");
		}
	}
}

import java.io.*

/**
 * This program reads a text file line by line and print to the console. It uses
 * FileOutputStream to read the file.
 * 
 */
public class FileInput {

	public static void main(String[] args) {
		File file = new File("MyFile.txt");
		FileReader fr = null;
		BufferedReader br = null;
		try {
		  fr = new FileReader(file);
		  br = new BufferedReader(fr);
		  while (br.ready()) { // br.read() returns false when the Buffer is not ready (end of file).
			System.out.println(br.readLine()); // this statement reads a line from the file and prints it to the console (and moves to next line and is "ready" if there IS a next line).
		  }
		  br.close(); // dispose of the resources after using them.
		}
		catch (FileNotFoundException e) { // File not found.
		  e.printStackTrace();
		  // Put something here like an error message.
		  System.out.println("The file could not be found.");
		}
		catch (IOException e) { // Error with transaction.
		  e.printStackTrace();
		  // Put something here like an error message.
		  System.out.println("There was an error reading the file.");
		}
	}
}

import java.io.*

/**
 * This program reads a text file line by line and print to the console. It uses
 * FileOutputStream to read the file.
 * 
 */
public class FileInput {

	public static void main(String[] args) {
		File file = new File("MyFile.txt");
		FileReader fr = null;
		BufferedReader br = null;

		try {
			fr = new FileReader(file);
			br = new BufferedReader(fr);

			// br.read() returns false if when the Buffer is not ready (reached end of file).
			while (br.ready()) {

			// this statement reads a line from the file and prints it to the console (and moves to next line and is "ready" if there IS any following bytes).
			System.out.println(br.readLine());
			}

			// dispose of the resources after using them.
			br.close();

		}
		catch (FileNotFoundException e) {
			e.printStackTrace(); // File not found.

			// Put something here like an error message.
			System.out.println("The file could not be found.");
		}
		catch (IOException e) {
			e.printStackTrace(); // Error with transaction.

			// Put something here like an error message.
			System.out.println("There was an error reading the file.");
		}
	}
}

import java.io.*

/**
 * This program reads a text file line by line and print to the console. It uses
 * FileOutputStream to read the file.
 * 
 */
public class FileInput {

  public static void main(String[] args) {

    File file = new File("C:\\MyFile.txt");
    FileInputStream fis = null;
    BufferedInputStream bis = null;
    DataInputStream dis = null;

    try {
      fis = new FileInputStream(file);

      // Here BufferedInputStream is added for fast reading.
      bis = new BufferedInputStream(fis);
      dis = new DataInputStream(bis);

      // dis.available() returns 0 if the file does not have more lines.
      while (dis.available() != 0) {

      // this statement reads the line from the file and print it to
        // the console.
        System.out.println(dis.readLine());
      }

      // dispose all the resources after using them.
      fis.close();
      bis.close();
      dis.close();

    } catch (FileNotFoundException e) {
      e.printStackTrace(); // File not found.
    } catch (IOException e) {
      e.printStackTrace(); // Error with transaction.
    }
  }
}

// Use: import java.io.*

try {
	BufferedReader in = new BufferedReader(new FileReader("infilename"));
	String str;
	while ((str = in.readLine()) != null) {
		process(str);
	}
	in.close();
}
catch (IOException e) {
	// Put something here like an error message or an action to do if file transaction fails.
}

try {
	BufferedReader in = new BufferedReader(new FileReader("infilename"));
	String str;
	while ((str = in.readLine()) != null) {
		process(str);
	}
	in.close();
}
catch (IOException e) {
	// Put something here like an error message or an action to do if file transaction fails.
}

Use this to read from a file. It is wrapped in a try/catch statement in case something breaks when trying to read the file. It will simply throw and exception (error) and continue rather than crashing your app.

How to read from a file in Java

java, files

Java