20165220实验二《Java面向对象程序设计》

实验封面:

20165220实验二《Java面向对象程序设计》

实验二 面向对象程序设计-1

实验要求:

参考 http://www.cnblogs.com/rocedu/p/6371315.html#SECUNITTEST

参考http://www.cnblogs.com/rocedu/p/6736847.html

提交最后三个测试用例都通过的截图,截图上要有画图加水印,输入自己的学号。

实验截图:

20165220实验二《Java面向对象程序设计》

相关代码:

public class MyUtil{
public static String percentage2fivegrade(int grade){
//如果成绩小于0,转成“错误”
if ((grade < 0))
return "错误";
//如果成绩小于60,转成“不及格”
else if (grade < 60)
return "不及格";
//如果成绩在60与70之间,转成“及格”
else if (grade < 70)
return "及格";
//如果成绩在70与80之间,转成“中等”
else if (grade < 80)
return "中等";
//如果成绩在80与90之间,转成“良好”
else if (grade < 90)
return "良好";
//如果成绩在90与100之间,转成“优秀”
else if (grade <= 100)
return "优秀";
//如果成绩大于100,转成“错误”
else
return "错误";
}
}

  

import org.junit.Test;
import junit.framework.TestCase;
public class MyUtilTest extends TestCase {
@Test
public void testNormal() {
assertEquals("不及格", MyUtil.percentage2fivegrade(55));
assertEquals("及格", MyUtil.percentage2fivegrade(65));
assertEquals("中等", MyUtil.percentage2fivegrade(75));
assertEquals("良好", MyUtil.percentage2fivegrade(85));
assertEquals("优秀", MyUtil.percentage2fivegrade(95));
}
@Test
public void testExceptions(){
assertEquals("错误", MyUtil.percentage2fivegrade(-55));
assertEquals("错误", MyUtil.percentage2fivegrade(120));
}
@Test
public void testBoundary(){
assertEquals("不及格", MyUtil.percentage2fivegrade(0));
assertEquals("及格", MyUtil.percentage2fivegrade(60));
assertEquals("中等", MyUtil.percentage2fivegrade(70));
assertEquals("良好", MyUtil.percentage2fivegrade(80));
assertEquals("优秀", MyUtil.percentage2fivegrade(90));
assertEquals("优秀", MyUtil.percentage2fivegrade(100));
} }

实验二 面向对象程序设计-2

实验要求:

参考 积极主动敲代码,使用JUnit学习Java (http://www.cnblogs.com/rocedu/p/4837092.html)

参考http://www.cnblogs.com/rocedu/p/6736847.html以 TDD的方式研究学习StringBuffer,提交你的单元测试用例和测试通过的截图,截图要加上学号水印。

实验截图:

20165220实验二《Java面向对象程序设计》

相关代码:

public class StringBufferDemo{
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("tring12345"));
System.out.println("buffer = " + buffer.toString());
System.out.println(buffer.length());
}
}
import junit.framework.TestCase;
import org.junit.Test; public class StringBufferDemoTest extends TestCase {
StringBuffer a = new StringBuffer("StringBuffer");
StringBuffer b = new StringBuffer("StringBufferStringBuffer");
StringBuffer c = new StringBuffer("StringBufferStringBufferStringBuffer");
StringBuffer d = new StringBuffer("StringBufferStringBufferStringBufferStr");
@Test
public void testcharAt() {
assertEquals('S',a.charAt(0));
assertEquals('e',b.charAt(10));
assertEquals('f',c.charAt(20));
assertEquals('B',d.charAt(30));
}
@Test
public void testcapacity() {
assertEquals(28,a.capacity());
assertEquals(40,b.capacity());
assertEquals(52,c.capacity());
assertEquals(55,d.capacity());
}
@Test
public void testindexOf() {
assertEquals(0,a.indexOf("Str"));
assertEquals(3,b.indexOf("ing"));
assertEquals(6,c.indexOf("Buffer"));
assertEquals(8,d.indexOf("ff"));
}
@Test
public void testlength() {
assertEquals(12,a.length());
assertEquals(24,b.length());
assertEquals(36,c.length());
assertEquals(39,d.length());
} }

实验二 面向对象程序设计-3

实验要求:

实验二 Java面向对象程序设计(http://www.cnblogs.com/rocedu/p/4472842.html)

参考http://www.cnblogs.com/rocedu/p/6736847.html
对设计模式示例进行扩充,体会OCP原则和DIP原则的应用,初步理解设计模式
用自己的学号%6进行取余运算,根据结果进行代码扩充:

0: 让系统支持Byte类,并在MyDoc类中添加测试代码表明添加正确,提交测试代码和运行结的截图,加上学号水印

1: 让系统支持Short类,并在MyDoc类中添加测试代码表明添加正确,提交测试代码和运行结的截图,加上学号水印

2: 让系统支持Boolean类,并在MyDoc类中添加测试代码表明添加正确,提交测试代码和运行结的截图,加上学号水印

3: 让系统支持Long类,并在MyDoc类中添加测试代码表明添加正确,提交测试代码和运行结的截图,加上学号水印

4: 让系统支持Float类,并在MyDoc类中添加测试代码表明添加正确,提交测试代码和运行结的截图,加上学号水印

5: 让系统支持Double类,并在MyDoc类中添加测试代码表明添加正确,提交测试代码和运行结的截图,加上学号水印

实验截图:

我的学号是20165220,余数是2所以选择:让系统支持Boolean类,并在MyDoc类中添加测试代码表明添加正确,提交测试代码和运行结的截图,加上学号水印

20165220实验二《Java面向对象程序设计》相关代码:

abstract class Data{
public abstract void DisplayValue();
}
class Integer extends Data {
int value;
Integer(){
value=100;
}
public void DisplayValue(){
System.out.println(value);
}
}
class Boolean extends Data{
boolean value;
Boolean(){
value=true;
}
public void DisplayValue(){
System.out.println(value);
}
}
class Document {
Data pd;
Document() {
pd=new Boolean();
}
public void DisplayData(){
pd.DisplayValue();
}
}
public class MyDoc {
static Document d;
public static void main(String[] args) {
d = new Document();
d.DisplayData();
}
}

实验二 面向对象程序设计-4

实验要求:

提交:单元测试代码和运行成功截图及码云上代码链接,截图要加上学号水印 参考http://www.cnblogs.com/rocedu/p/6736847.html

任务:以TDD的方式开发一个复数类Complex,要求如下:

// 定义属性并生成getter,setter

double RealPart;

double ImagePart;

// 定义构造函数

public Complex()

public Complex(double R,double I)

//Override Object

public boolean equals(Object obj)

public String toString()

// 定义公有方法:加减乘除

Complex ComplexAdd(Complex a)

Complex ComplexSub(Complex a)

Complex ComplexMulti(Complex a)

Complex ComplexDiv(Complex a)

实验截图:

20165220实验二《Java面向对象程序设计》

相关代码:

public 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 c) {
return new Complex(r + c.r, i + c.i);
}
public Complex ComplexSub(Complex c) {
return new Complex(r - c.r, i - c.i);
}
public Complex ComplexMulti(Complex c) {
return new Complex(r * c.r - i * c.i, r * c.i + i * c.r);
}
public Complex ComplexDiv(Complex c) {
return new Complex((r * c.i + i * c.r)/(c.i * c.i + c.r * c.r), (i * c.i + r * c.r)/(c.i * c.i + c.r * c.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;
}
}

  

import junit.framework.TestCase;
import org.junit.Test; public class ComplexTest extends TestCase {
Complex c1 = new Complex(0, 3);
Complex c2 = new Complex(-1, -1);
Complex c3 = new Complex(2,1);
@Test
public void testgetRealPart() throws Exception {
assertEquals(-1.0, Complex.getRealPart(-1.0));
assertEquals(5.0, Complex.getRealPart(5.0));
assertEquals(0.0, Complex.getRealPart(0.0));
}
@Test
public void testgetImagePart() throws Exception {
assertEquals(-1.0, Complex.getImagePart(-1.0));
assertEquals(5.0, Complex.getImagePart(5.0));
assertEquals(0.0, Complex.getImagePart(0.0));
}
@Test
public void testComplexAdd() throws Exception {
assertEquals("-1.0+2.0i", c1.ComplexAdd(c2).toString());
assertEquals("2.0+4.0i", c1.ComplexAdd(c3).toString());
assertEquals("1.0", c2.ComplexAdd(c3).toString());
}
@Test
public void testComplexSub() throws Exception {
assertEquals("1.0+4.0i", c1.ComplexSub(c2).toString());
assertEquals("-2.0+2.0i", c1.ComplexSub(c3).toString());
assertEquals("-3.0 -2.0i", c2.ComplexSub(c3).toString());
}
@Test
public void testComplexMulti() throws Exception {
assertEquals("3.0 -3.0i", c1.ComplexMulti(c2).toString());
assertEquals("-3.0+6.0i", c1.ComplexMulti(c3).toString());
assertEquals("-1.0 -3.0i", c2.ComplexMulti(c3).toString());
}
@Test
public void testComplexComplexDiv() throws Exception {
assertEquals("-1.5 -1.5i", c1.ComplexDiv(c2).toString());
assertEquals("1.2+0.6i", c1.ComplexDiv(c3).toString());
assertEquals("-0.6 -0.6i", c2.ComplexDiv(c3).toString());
}
}

实验二 面向对象程序设计-5

20165220实验二《Java面向对象程序设计》

实验PSP:

步骤 耗时 百分比
需求分析 20min 12.5%
设计 40min 25%
实现 40min 25%
测试 20min 12.5%
分析总结 40min 25%

  

问题:

Q:不太了解@Test是什么意思?

A:@Test注解是JUnit测试的基础,它提供了其他作用

1.指定将会抛出的异常类型,如果没有抛出异常或者抛出的一场不属于我们指定的类型,就会算是测试失败了。
2.测试一断代码运行时间。
java中@Test的作用

实验总结:

这周感觉相对来说还是比较困难的,从一开始安装插件开始出错到后来跟着娄老师的博客慢慢解决,这一过程可谓说是非常艰辛+愉快了,这周渐渐地用Java结合实际来解决简单数学问题,感觉对Java有了新的兴趣与了解,但还是有许多要补充的地方,应该回头多复习前几章的内容,多巩固知识点。

上一篇:HTML+JS实现视频上传显示进度条


下一篇:Extjs 使用fileupload插件上传文件 带进度条显示