java-查找字符串

import java.util.Scanner;

public class test {
public static void main(String[] args) {
Scanner in = new Scanner(System.in);
String s = new String (" ");
s = in.nextLine();
String c ;
c = in.next();
int z = s.indexOf(c);
if ( z == -1 ) {
System.out.println("Not found");
}
else {
System.out.println(s.substring(z));
}

}
}