Question 17

Assume that the following code has been executed (same for Questions 17 thru 20):

HashMap places = new HashMap(); places.put( "origin", new Point() ); places.put( "east", new Point( 100, 0 ) ); places.put( "south", new Point( 0, -100 ) ); places.put( "northwest", new Point( -100, 100 ) ); places.put( "east", new Point( 200, 0 ) ); 

What value is returned by the following method call? places.size()

1

4

0

5

Question 18

Assume that the following code has been executed (same for Questions 17 thru 20):

HashMap places = new HashMap(); places.put( "origin", new Point() ); places.put( "east", new Point( 100, 0 ) ); places.put( "south", new Point( 0, -100 ) ); places.put( "northwest", new Point( -100, 100 ) ); places.put( "east", new Point( 200, 0 ) ); 

What value is returned by the following method call?

places.get( "south" )

a Point object located at (100.0, 0.0)

null

a Point object located at (0.0, -100.0)

a Point object located at (0.0, 0.0)

Question 19

Assume that the following code has been executed (same for Questions 17 thru 20):

HashMap places = new HashMap(); places.put( "origin", new Point() ); places.put( "east", new Point( 100, 0 ) ); places.put( "south", new Point( 0, -100 ) ); places.put( "northwest", new Point( -100, 100 ) ); places.put( "east", new Point( 200, 0 ) ); 

What value is returned by the following method call? places.get( "east" )

a Point object located at (100.0, 0.0)

null

a Point object located at (200.0, 0.0)

a Point object located at (0.0, 0.0)

Question 20

Assume that the following code has been executed (same for Questions 17 thru 20):

HashMap places = new HashMap(); places.put( "origin", new Point() ); places.put( "east", new Point( 100, 0 ) ); places.put( "south", new Point( 0, -100 ) ); places.put( "northwest", new Point( -100, 100 ) ); places.put( "east", new Point( 200, 0 ) ); 

What value is returned by the following method call? places.get( "north" )

a Point object located at (0.0, 0.0)

a Point object located at (-100.0, 100.0)

a Point object located at (100.0, 0.0)

a Point object located at (0.0, 100.0)

null