Java: Read a plain text file

Last update on April 28 2025 07:43:18 (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.IOException;
import java.io.InputStreamReader;
import java.io.FileInputStream;
import java.io.FileReader;
 
public class Exercise12 {
 
    public static void main(String a[]){
        StringBuilder sb = new StringBuilder();
        String strLine = "";
        try {
             BufferedReader br = new BufferedReader(new FileReader("/home/students/test.txt"));
             while (strLine != null)
             {
                sb.append(strLine);
                sb.append(System.lineSeparator());
                strLine = br.readLine();
                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.                                                                                             
null 

Flowchart:

For more Practice: Solve these Related Problems:

• Write a Java program to read a plain text file and display its contents to the console.
• Write a Java program to read a text file into a String and print the length of the resulting text.
• Write a Java program to read a plain text file and count the frequency of each word present.
• Write a Java program to read a text file and output the content in reverse order.

Java Code Editor:

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