abstract class

[arivu mathi]

abstract class A {
private int x = 4, y = 2;
public int x() {return x;}
public void x(int x) {this.x = x;}
public int y() {return y;}
public void y(int y) {this.y = y;}
public abstract int math();
}
class B {
static A a1 = new A() {public int math() {return x()+y();}};
static A a2 = new A() {public int math() {return x()-y();}};
static A a3 = new A() {public int math() {return x()*y();}};
static A a4 = new A() {public int math() {return x()/y();}};
public static void main(String[] args) {
System.out.print("" + a1.math() + a2.math() +
a3.math() + a4.math());
}}


can anyone explain the flow plz

[wise owen]

Please Check this thread.

[mad dy]

Hi,

I hope this is correct.

1)Class A is abstract class which contains one abstract instance method math().
2)in Class B,4 static objects of class A are instantiated.
3)and for each object the abstarct math method is overridden differently.
static A a1 = new A() {
public int math() {
return x()+y(); // will return 4 + 2 = 6
}
};
static A a2 = new A() {
public int math() {
return x()-y(); // will return 4 - 2 = 2
}
};
static A a3 = new A() {
public int math() {
return x()*y(); // will return 4 * 2 = 8
}
};
static A a4 = new A() {
public int math() {
return x()/y(); // will return 4 / 2 = 2
}
};
4)print statement will give the o/p 6282


Cheers
Maady