Practice Inner Classes –
What will be the output of the program?
public static void main(String[] args) {
Object obj = new Object() {
public int hashCode() {
return 42;
}
};
System.out.println(obj.hashCode());
}
class Boo {
Boo(String s
Practice Inner Classes –
class Boo {
Boo(String s) {
}
Boo() {
}
}
class Bar extends Boo {
Bar() {
}
Bar(String s) {
super(s);
}
void zoo() {
// insert code here
}
} which one create an anonymous inner class from within class Bar?
Which is true about an anonymous inner class?
Practice Inner Classes –
Which is true about an anonymous inner class?
Practice Inner Classes –
What will be the output of the program?
public abstract class AbstractTest {
public int getNum() {
return 45;
}
public abstract class Bar {
public int getNum() {
return 38;
}
}
public static void main (String [] args) {
AbstractTest t = new AbstractTest() {
public int getNum() {
return 22;
};
AbstractTest.Bar f = t.new Bar() {
public int getNum() {
return 57;
}
};
System.out.println(f.getNum() + " " + t.getNum());
}
}
Practice Inner Classes –
What will be the output of the program?
public class TestObj {
public static void main (String [] args) {
Object o = new Object() /* Line 5 */ {
public boolean equals(Object obj) {
return true;
}
} /* Line 11 */
System.out.println(o.equals("Fred"));
}
}
Practice Inner Classes –
What will be the output of the program?
public class HorseTest {
public static void main (String [] args) {
class Horse {
public String name; /* Line 7 */
public Horse(String s) {
name = s;
}
} /* class Horse ends */
Object obj = new Horse("Zippo"); /* Line 13 */
Horse h = (Horse) obj; /* Line 14 */
System.out.println(h.name);
}
} /* class HorseTest ends */