问检查数组插槽中是否有数据

EN

import java.io.File;
import java.io.FileNotFoundException;
import java.util.Scanner;

public class Assignment {

public static void main(String[] args) throws FileNotFoundException {

    Scanner scan = new Scanner(new File("../Text.txt")); 

    String line; 

    while (scan.hasNext()) {

        line = scan.nextLine();

        String[] elements = line.split(":");

        System.out.println("The line has " + elements.length
                + " elements.");

        for (int i = 0; i < elements.length; i++) {

            System.out.println("Element " + (i + 1) + " was : " + elements[i]);


             int InvalidLine = 0;


             if (elements[i] == "");{

             Invalid++; }

             System.out.println("Invalid Fields " + InvalidLine);

        }

    }

}

}