Java: Read a file content line by line

Last update on March 13 2025 09:00:53 (UTC/GMT +8 hours)

Write a Java program to read file content line by line.

Sample Solution:

Java Code:

import java.io.BufferedReader;
import java.io.FileNotFoundException;
import java.io.FileReader;
import java.io.IOException;
 
public class Exercise11 {
 
    public static void main(String a[]){
        BufferedReader br = null;
        String strLine = "";
        try {
            br = new BufferedReader( new FileReader("/home/students/test.txt"));
            while( (strLine = br.readLine()) != null){
                System.out.println(strLine);
            }
            br.close();
        } catch (FileNotFoundException e) {
            System.err.println("File not found");
        } catch (IOException e) {
            System.err.println("Unable to read the file.");
        }
     }
}

Sample Output:

Welcome to w3resource.com.                                                                                    
Append this text.Append this text.Append this text.                                                           
Append this text.                                                                                             
Append this text.                                                                                             
Append this text.                                                                                             
Append this text.

Flowchart:

For more Practice: Solve these Related Problems:

• Write a Java program to read a text file line by line and display each line along with its line number.
• Write a Java program to read a file line by line and count the total number of lines.
• Write a Java program to read a file line by line using BufferedReader and store the lines in a List.
• Write a Java program to read a file line by line and filter out lines that do not contain a specified keyword.

Java Code Editor:

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