I am confused by the concept of Constructor when I got this question:
1. class Mystery {
2.
String s;
3. public static void main(String args[]) {
4. Mystery m = new Mystery();
5. m.go();
6. }
7. void Mystery() {
8. s = "Constructor";
9. }
10. void go() {
11. System.out.println(s);
12. }
13. }
I expected the answer is Constructor, but the it prints out null. My understanding is when new Mystery, the "Constructor" will be passed to s, then go method can print it out.
When I tried to modify the code and want to print "Constructor" out, but got complie error with cannot resolve symbol construcor Mystery.
class Mystery {
String s;
void Mystery(String s) {
this.s = s;
}
public static void main(String args[]) {
Mystery m = new Mystery("an");
m.go(m.s);
System.out.println("m.s is "+m.s);
}
void go(String s) {
System.out.println(s);
}
}
i must missing something. please help. Thanks.
Mike
