Main.java

public class Main {

    public static void main(String args[]) {
        Point p1 = new Point(1, 1);
        Point p2 = new Point(2, 3);
        Point p3 = new Point(1, 1);

        // false
        System.out.println(p1.equals(p2));
        // true
        System.out.println(p1.equals(p3));
    }
}

Point.java

public class Point {
    // フィールド
    private int x;
    private int y;

    // コンストラクタ
    public Point(int x, int y) {
        this.x = x;
        this.y = y;
    }

    public boolean equals(Object object) {
        if (object == null || !(object instanceof Point)) {
            return false;
        }

        Point target = (Point) object;

        return true;
    }

}