Find the bug in 'equals' method implementation

There is a bug in the implementation of equals method in class Point below. Identify the bug and answer the question.

class Point {
 Point(int x, int y) {
  x_ = x;
  y_ = y;
 }

 public boolean equals(Point p) {
  if( p == null )
    return false;

  return ( this == p ) || 
         ( p.x_ == x_ && p.y_ == y_ );
 }

 // .. hashCode is implemented too

 private int x_;
 private int y_;
}

Create 2 instances of Point and call equals as follows:

Point p1 = new Point(10, 20);
Point p2 = new Point(10, 20);
Object p3 = p2;

// call equals    
String result = p1.equals(p2) 
                + " " 
                + p1.equals(p3);

What will be the value of result above?