Java: Read contents from a file into byte array
10. Read File into Byte Array
Write a Java program to read the contents of a file into a byte array.
Sample Solution:
Java Code:
import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.io.IOException;
import java.io.InputStream;
// Reading contents from a file into byte array.
public class Exercise10 {
public static void main(String a[]){
String file_name = "/home/students/test.txt";
InputStream fins = null;
try {
fins = new FileInputStream(file_name);
byte file_content[] = new byte[2*1024];
int read_count = 0;
while((read_count = fins.read(file_content)) > 0){
System.out.println(new String(file_content, 0, read_count-1));
}
} catch (FileNotFoundException e) {
e.printStackTrace();
} catch (IOException e) {
e.printStackTrace();
} finally {
try{
if(fins != null) fins.close();
} catch(Exception ex){
}
}
}
}
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 the entire contents of a file into a byte array using Java NIO.
- Write a Java program to convert a file to a byte array and then reconstruct the file from the array.
- Write a Java program to read a binary file into a byte array and display its hexadecimal representation.
- Write a Java program to compare the byte arrays of two files to check if they are binary identical.
Go to:
PREV : Get File Size.
NEXT : Read File Line by Line.
JavaCode Editor:
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