斯坦福大学：编程方法学 Lesson two

 1 import stanford.karel.*;
 2 public class Mykarel01 extends Karel{
 3     public void run(){
 4         move();
 5         pickBeeper();
 6         move();
 7         turnLeft();
 8         move();
 9         move();
10         turnRight();
11         move();
12         putBeeper();
13         move();
14     }
15     public void turnRight(){
16         turnLeft();
17         turnLeft();
18         turnLeft();        
19     }
20 
21 }

 1 import stanford.karel.*;
 2 public class Mykarel01 extends SuperKarel{
 3     public void run(){
 4         move();
 5         pickBeeper();
 6         move();
 7         turnLeft();
 8         move();
 9         move();
10         turnRight();
11         move();
12         putBeeper();
13         move();
14     }
15 
16 }

 1 import stanford.karel.*;
 2 public class ClimbKarel extends Karel{
 3     public void run(){
 4         for(int i=0;i<7;i++){
 5             if(frontIsClear()){
 6                 move();
 7                 }
 8             else{
 9                 jumpWall();
10             }
11         }
12     }
13     public void jumpWall(){
14         up();
15         move();
16         down();
17     }
18     public void up(){
19         turnLeft();
20         while(!rightIsClear()){
21             move();
22         }
23         turnRight();
24     }
25     public void down(){
26         turnRight();
27         while(frontIsClear()){
28             move();
29         }
30         turnLeft();
31     }
32     public void turnRight(){
33         turnLeft();
34         turnLeft();
35         turnLeft();
36     }
37 
38 }