20165334 实验三敏捷开发与XP实践

一、规范代码

读了娄老师的博客我对规范代码的理解是，代码的格式要有层次感、代码中给包、类、变量、方法等标识符命名要有规范、易懂性。

//没有规范前
public class CodeStandard {
public static void main(String [] args){
StringBuffer buffer = new StringBuffer();
buffer.append('S');
buffer.append("tringBuffer");
System.out.println(buffer.charAt(1));
System.out.println(buffer.capacity());
System.out.println(buffer.indexOf("tring"));
System.out.println("buffer = " + buffer.toString());
if(buffer.capacity()<20)
buffer.append("1234567");
for(int i=0; i<buffer.length();i++)
System.out.println(buffer.charAt(i));
}
}

代码规范后

Code菜单的功能学习

Override Methods(Ctrl+O)重载基本类的方法；
Generate(Alt+Insert)创建类里面任何字段的 getter 与 setter 方法；
Implement Methods(Ctrl+I)完成当前类 implements 的（或者抽象基本类的）接口的方法；
Reformat Code(Ctrl+Alt+L)将代码按标准格式缩进；

二、下载搭档实验二的Complex代码，加入不少于三个JUnit单元测试用例

搭档的Complex产品代码如下

 class Complex {
     private double r;
     private double i;

     public Complex(double r, double i) {
         this.r = r;
         this.i = i;
     }
     public static double getRealPart(double r) {
         return r;
     }
     public static double getImagePart(double i) {
         return i;
     }

     public Complex ComplexAdd(Complex a) {
         return new Complex(r + a.r, i + a.i);
     }

     public Complex ComplexSub(Complex a) {
         return new Complex(r - a.r, i - a.i);
     }
     public Complex ComplexMulti(Complex a) {
         return new Complex(r * a.r - i * a.i , r * a.i + i * a.r);
     }
     public Complex ComplexDiv(Complex a) {
         return new Complex((r * a.i + i * a.r) / (a.i * a.i + a.r * a.r), (i * a.i + r * a.r) / (a.i * a.i + a.r * a.r));
     }
     public String toString() {
         String s =" ";
         if (i > 0)
             s =r +"+"+ i +"i";
         if (i == 0)
             s =r+"";
         if (i < 0)
             s = r +" "+ i+"i";
         return s;
     }
 }