Java Exercises: Read a file line by line and store it into a variable
Java Input-Output: Exercise-13 with Solution
Write a java program to read a file line by line and store it into a variable.
Sample Solution:
Java Code:
import java.io.BufferedReader;
import java.io.FileNotFoundException;
import java.io.IOException;
import java.io.FileReader;
public class exercise13 {
public static void main(String a[]){
StringBuilder sb = new StringBuilder();
String strLine = "";
String str_data = "";
try {
BufferedReader br = new BufferedReader(new FileReader("/home/students/test.txt"));
while (strLine != null)
{
if (strLine == null)
break;
str_data += strLine;
strLine = br.readLine();
}
System.out.println(str_data);
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:
Java Code Editor:
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Previous: Write a Java program to read a plain text file.
Next: Write a Java program to store text file content line by line into an array.
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Java: Tips of the Day
How to sort an ArrayList?
Collections.sort(testList); Collections.reverse(testList);
That will do what you want. Remember to import Collections though!
Ref: https://bit.ly/32urdSe
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