PreQuiz 2-Fall 2005
Assuming that PositionedSceneElement has the methods copy() and last(), trace the below code:
public class DrawAScene {
public static void main(String [] args){
FileChooser.setMediaPath("D:/cs1316/mediasources/");
Picture p = new Picture(FileChooser.getMediaPath("swan.jpg"));
PositionedSceneElement node1 = new PositionedSceneElement(p.scale(0.15));
p = new Picture(FileChooser.getMediaPath("turtle.jpg"));
PositionedSceneElement node2 = new PositionedSceneElement(p.scale(0.25));
PositionedSceneElement node3 = new PositionedSceneElement(p.scale(0.25).flip());
node1.setNext(node2.copy());
node1.setNext(node3.copy());
node1.getNext().setNext(node2.copy());
for (int i=0; i<3; i++)
{node1.getNext().getNext().last().insertAfter(node1.copy());}
for (int i=0; i<4; i++)
{node1.getNext().insertAfter(node2.copy());}
Picture bg=new Picture(800,400);
node1.drawFromMeOn(bg);
bg.show();
}
}
- What picture will be shown at the end? Sketch out the result.
- Draw a diagram of the nodes in the final linked list connected to node1 in this example.
Answers? Questions? Comments? Requests?
1. swan, i can't draw that here. but it looks like a scaled down swan picture from mediasources folder
2. n1 > n3 > n2 >n2 >n2 >n2 >n2 > n1 > n1 > n1
Removed at KS request
| I didn't mean the last node, in "what will be shown at the end." I meant, "Tell me what's shown." Every picture. Mark Guzdial |
oh, swan, normal turtle, flipped turtle 5 times then three swans
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