20145329 《Java程序设计》实验二总结

实验指导教师：娄嘉鹏老师

实验日期：2016.4.12

实验时间：15：30~17：30

实验序号：实验二

实验名称：Java面向对象程序设计

实验目的与要求：

1.初步掌握单元测试和TDD

2.理解并掌握面向对象三要素：封装、继承、多态

3.初步掌握UML建模

4.熟悉S.O.L.I.D原则

5.了解设计模式

实验内容

1.使用TDD的方式实现设计复杂类Complex

2.实验报告中统计自己的PSP

3.实现要有伪代码、产品代码、测试代码

4.总结单元测试的好处

实验过程中

伪代码

定义实部和虚部

默认构造方法

带参数的构造方法

得到实部，得到虚部

得到复数c的实部，得到复数c的虚部

设置实部，设置虚部

两个复数相加，结果返回

两个复数相减，结果返回

两个复数相乘，结果返回

测试代码

import org.junit.Test;

import static org.junit.Assert.*;

public class ComplexNumberTest {

@Test

public void testGetRealPart() throws Exception {

ComplexNumber cc=new ComplexNumber(3,5);

assert cc.m_dRealPart==3:

"testGetRealPart()处理有错误";

}

@Test
public void testGetImaginaryPart() throws Exception {
    ComplexNumber cc=new ComplexNumber(3,5);
    assert cc.m_dImaginaryPart==5:
            "testGetRealPart()处理有错误";
}

@Test
public void testSetRealPart() throws Exception {
    ComplexNumber cc=new ComplexNumber();
    assert cc.m_dRealPart==0:
    "testSetRealPart()处理有错误";

}

@Test
public void testSetImaginaryPart() throws Exception {
    ComplexNumber cc=new ComplexNumber();
     assert cc.m_dImaginaryPart==0:
    "testSetImaginaryPart()处理错误";
}

@Test
public void testComplexAdd() throws Exception {
    ComplexNumber cc=new ComplexNumber(3,5);
    ComplexNumber dd=new ComplexNumber(3,3);
    ComplexNumber ff=cc.ComplexAdd(cc,dd);
    assert ff.m_dRealPart==6&&ff.m_dImaginaryPart==8:
            "ComplexAdd()方法处理错误";
}

@Test
public void testComplexMinus() throws Exception {
    ComplexNumber cc=new ComplexNumber(3,5);
    ComplexNumber dd=new ComplexNumber(3,3);
    ComplexNumber ff=cc.ComplexMinus(cc,dd);
    assert ff.m_dRealPart==0&&ff.m_dImaginaryPart==2:
            "ComplexMinus()方法处理错误";
}

@Test
public void testComplexMulti() throws Exception {
    ComplexNumber cc=new ComplexNumber(3,5);
    ComplexNumber dd=new ComplexNumber(3,3);
    ComplexNumber ff=cc.ComplexMulti(cc,dd);
    assert ff.m_dRealPart==-6&&ff.m_dImaginaryPart==24:
            "ComplexMulti()方法处理错误";
}

@Test
public void testComplexAdd1() throws Exception {
    ComplexNumber cc=new ComplexNumber(3,5);
    ComplexNumber ff=cc.ComplexAdd1(2);
    assert ff.m_dRealPart==5&&ff.m_dImaginaryPart==5:
            "ComplexAdd1()方法处理错误";
}

@Test
public void testComplexMinus1() throws Exception {
    ComplexNumber cc=new ComplexNumber(3,5);
    ComplexNumber ff=cc.ComplexMinus1(2);
    assert ff.m_dRealPart==1&&ff.m_dImaginaryPart==5:
            "ComplexMinus1()方法处理错误";
}

@Test
public void testComplexMulti1() throws Exception {
    ComplexNumber cc=new ComplexNumber(3,5);
    ComplexNumber ff=cc.ComplexMulti1(2);
    assert ff.m_dRealPart==6&&ff.m_dImaginaryPart==10:
            "ComplexMulti1()方法处理错误";
}

}

产品代码

public class ComplexNumber {

double m_dRealPart, m_dImaginaryPart;

public ComplexNumber() {
    this.m_dRealPart = 0;
    this.m_dImaginaryPart = 0;
}

public ComplexNumber(double real, double img) {            this.m_dRealPart = real;
    this.m_dImaginaryPart = img;
}

public double GetRealPart() {
    return this.m_dRealPart;
}        

public double GetImaginaryPart() {
    return this.m_dImaginaryPart;
}        

public double GetRealPart(ComplexNumber c) {
    return c.m_dRealPart;
}
public double GetImaginaryPart(ComplexNumber c) {
    return c.m_dImaginaryPart;
}        

public void SetRealPart(double real) {
    this.m_dRealPart = real;
}
public void SetImagijnPart(double img) {
    this.m_dImaginaryPart = img;
}        

public ComplexNumber ComplexAdd(ComplexNumber a, ComplexNumber b) {
    ComplexNumber temp = new ComplexNumber();        temp.m_dRealPart = a.m_dRealPart + b.m_dRealPart;
    temp.m_dImaginaryPart = a.m_dImaginaryPart + b.m_dImaginaryPart;
    return temp;
}
public ComplexNumber ComplexMinus(ComplexNumber a, ComplexNumber b) {
    ComplexNumber temp = new ComplexNumber();
    temp.m_dRealPart = a.m_dRealPart - b.m_dRealPart;
    temp.m_dImaginaryPart = a.m_dImaginaryPart - b.m_dImaginaryPart;
    return temp;
}

public ComplexNumber ComplexMulti(ComplexNumber a, ComplexNumber b) {
    ComplexNumber temp = new ComplexNumber();
    temp.m_dRealPart = a.m_dRealPart * b.m_dRealPart - a.m_dImaginaryPart * b.m_dImaginaryPart;
    temp.m_dImaginaryPart = a.m_dRealPart * b.m_dImaginaryPart + a.m_dImaginaryPart * b.m_dRealPart;
    return temp;
}

public ComplexNumber ComplexAdd1(double a) {
    this.m_dRealPart = this.m_dRealPart + a;
    return this;
}

public ComplexNumber ComplexMinus1(double a) {
    this.m_dRealPart = this.m_dRealPart - a;
    return this;
}

public ComplexNumber ComplexMulti1(double a) {
    this.m_dRealPart = this.m_dRealPart * a;
    this.m_dImaginaryPart = this.m_dImaginaryPart * a;
    return this;
}
public String toString(){
    return this.m_dRealPart+"+"+this.m_dImaginaryPart+"i";
}

}

测试结果

UML建模

PSP时间

步骤	耗时（min	百分比
需求分析	40	20%
设计	30	15%
代码实现	50	25%
测试	50	25%
分析总结	30	15%