[JAVA] Jak wyświetlić zawartość pliku?

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

public class JavaApplication4 {

/**
* @param args the command line arguments
*/
public static void main(String[] args) throws FileNotFoundException{

Scanner sc = new Scanner(new File("c://plik.txt"));
String a="";
while(sc.hasNext())
{

a=a+sc.nextLine();

}

System.out.print(a);

}

}