The length() method of File returns the file size. This is the oldest API to find out the size of a file in Java.
Java file size with File
The code example determines the file size using the File's length() method.
import java.io.File;
public class JavaFileSizeEx {
public static void main(String[] args) {
String fileName = "src/main/resources/words.txt";
File f = new File(fileName);
long fileSize = f.length();
System.out.format("The size of the file: %d bytes", fileSize);
}
}
Output:
The size of the file: 2000 bytes
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