null-self :
public class ScannerTest {
protected Scanner scan;
public ScannerTest(String s) {
Scanner scan = new Scanner(s);
}
public void getone() {
if (scan.hasNext()) {
String temp = scan.next();
temp = temp.replaceAll("[\\[\\](){}]", "");
System.out.println(temp);
}
}
public static void main(String[] args) {
String s = "(abcd) (defg) (w)";
ScannerTest test = new ScannerTest(s);
Scanner rando = new Scanner(s);
System.out.println(rando.next());
System.out.println(rando.hasNext());
test.getone();
}
}
S. MS :
you are victim of so called variable shadowing. With line
Scanner scan = new Scanner(s);
you are declaring a local variable scan instead of initialize your member scan inside a your ScannerTest class. Change the mentioned line to
scan = new Scanner(s);
and it will work as desired...
complete source code
import java.util.Scanner;
public class SomeClass {
protected Scanner scan;
public SomeClass(String s) {
scan = new Scanner(s);
}
public void getone() {
if (scan.hasNext()){
String temp = scan.next();
temp = temp.replaceAll("[\\[\\](){}]","");
System.out.println(temp);
}
}
public static void main(String[] args) {
String s = "(abcd) (defg) (w)";
SomeClass test = new SomeClass(s);
Scanner rando = new Scanner(s);
System.out.println(rando.next());
System.out.println(rando.hasNext());
test.getone();
}
}