Download Introduction to Eclipse

敏捷方法教材
Eclipse Usage
林廷原、王秉森
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Environment
• Eclipse IDE for Java Developers
– Version: Indigo Service Release 2, 32bit
• JDK SE 1.7
• Plug-in: eUML2 (studio)
– Reverse engineering
– Free for use, but some functionalities are limited.
• It’s enough for our project.
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Contents
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Introduction to Eclipse
JUnit
Software engineering
Plug-in(UML reverse)
Practical skills
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Contents
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Introduction to Eclipse
JUnit
Software engineering
Plug-in(UML reverse)
Practical skills
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Introduction to Eclipse
• About eclipse:
– Free.
– Easy to use.
– …(data on wiki)
Just Try!
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Introduction to Eclipse(Cont.)
Perspective
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Introduction to Eclipse(Cont.)
• Try click right mouse button.
– Convenient.
– Easy to find what you want.
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Introduction to Eclipse(Cont.)
Recover perspective from mess
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Introduction to Eclipse(Cont.)
• We sincerely suggest you use and be familiar
with this kind of tools.
– Benefits: efficient, Intuitive.
• Get used to debug with debugger.
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Introduction to Eclipse(Cont.)
DEMO
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Contents
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Introduction to Eclipse
JUnit
Software engineering
Plug-in(UML reverse)
Practical skills
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JUnit
• JUnit is used to implement unit tests in java.
– is a java framework written by Erich Gamma and
Kent Beck.
• JUnit: Java unit test framework.
• Note: There are suitable frameworks for other programming languages
such as C# (NUnit)，JavaScript (JSUnit) …
•
A software framework is an abstraction in which software providing generic functionality can be
selectively changed by user code, thus providing application specific software. It is a collection of software
libraries providing a defined application programming interface (API). (from Wiki)
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JUnit(Cont.)
Software
Object
(Unit)
Belong to a same class,
but these are different
objects.
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JUnit(Cont.)
• Object is instance of Class.
• Usually, a class has a corresponding Unit test
class.
– JUnit test case is written in class.
• We are going to test a unit. (a small piece of
software)
– Class
• Methods, fields…
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JUnit(Cont.)
• Test is not easy.
– Debugging a small unit is much easier than
debugging all system.
• Unit test is one of many test methods.
– It’s Important to agile method.
FYI: Nice perspective about unit test:
http://zishen.blogspot.com/2011/04/unit-test.html
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JUnit(Cont.)
Values are not equal?
1+1=3??
NullException…
Without Unit test…
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JUnit(Cont.)
How about this?
And… the last build has
some errors.
Which one is wrong?
Boss: Fix it!
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JUnit(Cont.)
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JUnit(Cont.)
• Why use unit test?
– Auto.
– Fast.
– Easy to do by programmer.
– Improve efficiency of teamwork.
– Guarantee the result to be correct after code
modification.
– Make you sure that the modifications in the code
will not break your system without your
knowledge.
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JUnit(Cont.)
With Unit test
Much better…
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JUnit(Cont.)
• JUnit 3.8 or Junit 4.0?
– Readability of JUnit 4.0 is better than JUnit 3.8.
– We suggest you use JUnit 4.0.
– Junit 3.8 uses naming conventions.
– Junit 4.0 uses annotation.
FYI: What is Annotation? http://djjchobits.iteye.com/blog/569000
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JUnit 3.8
public class testFixture extends TestCase{
Calculate calculate = null;
public void setUp() throws Exception {calculate = new
Calculate();}
public void tearDown() throws Exception {calculate = null;}
public void testAdd()
{assertEquals(30,calculate.Addition(10,20)); }
public void testSub() {assertEquals(-10,
calculate.Subtraction(10,20));}
}
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JUnit 3.8(Cont.)
public void testDivisionByZero() {
try {
calculate.division(1,0);
fail(“Did’t catch the expected
exception !");
}
catch (ArithmeticException success) {
assertNotNull(success.getMessage());
}
}
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JUnit 4.0
public class testFixture {
Calculate calculate = null;
annotation
@Before
public void initialize() throws Exception {calculate = new Calculate();}
@After
public void cleanObject() throws Exception {calculate = null;}
@Test
public void Add() {assertEquals(30,calculate.Addition(10,20));}
@Test
public void Sub() {assertEquals(10,calculate.Subtraction(10,20));}
}
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JUnit 4.0
public class testFixture {
Calculate calculate = null;
Must be public and void
@Before
public void initialize() throws Exception {calculate = new Calculate();}
@After
public void cleanObject() throws Exception {calculate = null;}
@Test
public void Add() {assertEquals(30,calculate.Addition(10,20));}
@Test
public void Sub() {assertEquals(10,calculate.Subtraction(10,20));}
}
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JUnit 4.0(Cont.)
public class testFixture {
Calculate calculate = null;
Method to be run before test.(Initialization)
@Before
public void initialize() throws Exception {calculate = new Calculate();}
Method to be run after test.(clearing)
@After
public void cleanObject() throws Exception {calculate = null;}
Method to be run as test case.
@Test
public void Add() {assertEquals(30,calculate.Addition(10,20));}
2 test cases
@Test
public void Sub() {assertEquals(10,calculate.Subtraction(10,20));}
}
assertNotNull, assertTrue, assertXXXXX
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JUnit 4.0(Cont.)
public class testFixture {
Calculate calculate = null;
execute sequence
1 4 @Before
public void initialize() throws Exception {calculate = new Calculate();}
3 6
@After
public void cleanObject() throws Exception {calculate = null;}
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@Test
public void Add() {assertEquals(30,calculate.Addition(10,20));}
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@Test
public void Sub() {assertEquals(10,calculate.Subtraction(10,20));}
}
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JUnit 4.0(Cont.)
@Test(expected=ArithmeticException.class)
public void testDivByZero() {
calculate.division(1,0);
}
Test case with expected exception.
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JUnit in Eclipse
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JUnit in Eclipse(Cont.)
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JUnit in Eclipse(Cont.)
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JUnit in Eclipse(Cont.)
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JUnit in Eclipse(Cont.)
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JUnit in Eclipse(Cont.)
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JUnit in Eclipse(Cont.)
DEMO
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Contents
•
•
•
•
•
Introduction to Eclipse
JUnit
Software engineering
Plug-in(UML reverse)
Practical skills
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Software engineering
• Many IDEs(e.g. eclipse) are closely related to
software engineering.
– Unit test.
– Refactor.
– Java’s comments: header can be turned into
javadoc if you follow the header’s format.
• Eclipse has many powerful plugins supporting
software engineering.
– Such as UML editor, reverse tool…
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Software engineering(Cont.)
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Software engineering(Cont.)
Javadoc
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Software engineering(Cont.)
Javadoc of ArrayList
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Software engineering(Cont.)
Comment
(green)
Source code of ArrayList
/*I am comment too*/
header
(blue)
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Software engineering(Cont.)
We can generate our API doc too!
We need HTML tag
to typeset.
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Software engineering(Cont.)
DEMO
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Contents
•
•
•
•
•
Introduction to Eclipse
JUnit
Software engineering
Plug-in(UML reverse)
Practical skills
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Plug-in(UML reverse)
• Advantage:
– Dynamic generate UML diagram.
– The diagram will absolutely match the source
code.
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Plug-in(UML reverse)(Cont.)
• Plug-in: eUML2 (studio version)
• Webpage:
http://www.soyatec.com/euml2/installation/
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Plug-in(UML reverse)(Cont.)
• How to install software?
– Online update (we use this one)
– Offline installation
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Plug-in(UML reverse)(Cont.)
• Help -> Install New Software
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Plug-in(UML reverse)(Cont.)
• Click add button
• Type : http://www.soyatec.com/update in Location Field
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Plug-in(UML reverse)(Cont.)
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Plug-in(UML reverse)(Cont.)
• How to use it ?
– right click on package > eUML2> Class diagram
editor…
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Plug-in(UML reverse)(Cont.)
• Result:
so easy !
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Plug-in(UML reverse)(Cont.)
DEMO
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Contents
•
•
•
•
•
Introduction to Eclipse
JUnit
Software engineering
Plug-in(UML reverse)
Practical skills
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Shortcut key
look up shortcut key table
Shortcut key can also be change by us.
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Shortcut key(Cont.)
• Find/Replace
Ctrl + F
• Undo
Ctrl + Z
• Run project
Ctrl + F11
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Shortcut key(Cont.)
• Find next item
Ctrl + K
• Find previous item
Ctrl + Shift + K
• Content Assist
Alt + /
• Automatic typesetting(Format code)
Ctrl + Shift + F
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Shortcut key(Cont.)
• Delete a line of text
Ctrl + D
• Rename the selected element
Alt + Shift + R
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Shortcut key(Cont.)
• Search for references to the selected element
in the workspace
Ctrl+Shift+G
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Search
Ex: search “age”
Scenario 1 : I'm not sure what the attribute of “age” is.
Use file search
result
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Search(Cont.)
Scenario 2 : I know “age” is a java method.
Use java search
as easy as pie
result:
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Search(Cont.)
Scenario 3 : I know “age” is a primitive data type.
:
result :
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Open java source code
• Setting :window > Preferences > Java > install JREs
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Open java source code(Cont.)
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Open java source code(Cont.)
Java doc. 檔案
•
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Open java source code(Cont.)
• See the java document
move the mouse onto the class you want to see
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Open java source code(Cont.)
• See the java source code(open declaration)
ctrl + click the class you are interested in
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Practical skills
DEMO
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The end
Q&A:
Any question?
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