Remove String

package removestring;
import java.util.Scanner;
public class RemoveString {

    public static void main(String[] args) {
    Scanner input = new Scanner(System.in);
    String sentence, str;
    System.out.print("Enter a sentence:");
    sentence = input.nextLine();
    System.out.print("Enter a string:");
    str = input.nextLine();
    input.close();
    sentence = sentence.replaceAll(str,"");
    System.out.print(sentence);
    }

}