2016/5/19学习记录

1.easy小代码关于TV
 1 public class TV {
 2     private int channel = 0;
 3     private int volumeLevel = 0;
 4     private boolean on = false;
 5     
 6     public TV() {
 7     }
 8 
 9     public void turnOn(){
10         on = true;
11     }
12     public void turnOff(){
13         on = false;
14     }
15     public void setChannel(int i){
16         if(on&&i>0&&i<=120)
17         channel = i ;
18     }
19     public void setVolume(int k){
20          if(on&&k>0&&k<=7)
21          volumeLevel = k;
22     }
23     public void channelUp(){
24         if(on&&channel<120)
25             channel++;
26     }
27     public void channelDown(){
28         if(on&&channel>0)
29             channel--;
30     }
31     public void volumeUp(){
32         if(on&&volumeLevel<7)
33             volumeLevel++;
34     }
35     public void volumeDown(){
36         if(on&&volumeLevel>1)
37             volumeLevel--;
38     }
39     public void getVolume(){
40         System.out.println("THe volume is "+volumeLevel);
41     }
42     public void getChannel(){
43         System.out.println("THe channel is "+channel);
44     }
45     
46     
47     public static void main(String[] args) {
48         // TODO Auto-generated method stub
49     TV tv = new TV();
50     tv.turnOn();
51     tv.setChannel(52);
52     tv.setVolume(5);
53     tv.channelDown();
54     tv.volumeUp();
55     tv.getChannel();
56     tv.getVolume();
57     }
58 
59 }