Get file size in java

How to check the file size:

public static long getFileSize(String filename) {

    File file = new File(filename);
   
    if (!file.exists() || !file.isFile()) {
      System.out.println("File doesn\'t exist");
      return -1;
    }
   
    //Here we get the actual size
    return file.length();
  }

To get the file size in KB, just divide file.length() by 1024. i.e.

public static long getFileSizeInKB(String filename) {
    File file = new File(filename);
       if (!file.exists() || !file.isFile()) {
      System.out.println("File doesn\'t exist");
      return -1;
    }
       //Here we get the size in KB
    return file.length()/1024;
  }