Java by 北極熊: 11月 2007

2007年11月30日星期五

Homework 11-30-2007

Do Temperature Project, which is Project 7 (3rd, 2nd ed.) or Project 3 (1st ed.).

這次作業最大的問題好像是看懂題目~"~
我想題目應該是...
寫出兩個method來接收溫度
包含數字部份以及溫度的規格
所以基本就是要有接收兩組溫度的method(getData)(後面要比較)
有了兩組之後就是要有比較的method(comparison)
最後要有toString()把這些輸出
其中華氏及攝氏的轉換
數字方面只能到小數點後一位(round to nearest tenth of a degree)
接下來就是作業部分

下面是Temperature 的Class主體
由於過於龐大
先print出主體

下面這個是轉換華氏or攝氏的method

接下來是取得溫度的資料的method

輸出的method

還有比較用的method
這部分打了很多
我想也許是有太多不必要的邏輯吧

先把基本配備都弄齊全了
就可以開始RUN囉~

0C vs 32F the same

25C vs 60F 25C > 60F

25C vs 78F 25C < 78F

-40C vs -40F the same

100C vs 212F the same

這次的作業似乎比以前更為複雜
也運用了更多class跟method
也更為深入了

2007年11月29日星期四

Lab counter

Define a class called Counter whose objects count things. An object of this class records a count that is a nonnegative integer. Include methods to set the counter to 0, to increase the count by 1, and to decrease the count by 1. Include an accessor method that returns the current count value and a method that outputs the count to the screen. Write a program to test

counter.reset();
counter.inc();
counter.inc();
counter.dec();
counter.output();

Lab Class Definition 3

Do Display 4.7 (3rd, 2nd ed.) or 4.5 (1st ed.). Then use Display 4.8 to call 4.7.

Question
The method setDate has the parameter as setDate(int month, int day, int year).
What kind of changes should be made in its body of codes?

課本的範例

接下來則是練習上課的this

2007年11月15日星期四

Homework 11/16/2007: lab class definition 2

Study Display 4.4 (2nd ed. and 3rd ed.) or Display 4.2 & Display 4.3 (1st ed.) and then
1. Comment out date.setDate(6, 17, year); by // date.setDate(6, 17, year);
2. At the next line below, add date.readInput();
3. Run the program again. Fix any problems you may encouter along the way.
4. At the last line of your program, add System.out.println(date.month);
and see what happens. Why?

先把Display4.4打出來