Overriding Methods

public class Point {
    private int x, y;
    public Point(int a, int b) { x = a; y = b; }
    public boolean equals(Object o) {
        if (!(o instanceof Point)) return false;
        Point p = (Point) o;
        return x == p.x && y == p.y;
    }
    public int hashCode() { return x * 31 + y; }
}
// Usage:
Point a = new Point(1, 2);
Point b = new Point(1, 2);
System.out.print(a.equals(b) && a.hashCode() == b.hashCode());

• A

  0

• B

  Compile error

• C

  false

• D

  true

  check_circle