程序代写 FB 150, - PowCoder代写

Comp 110/401
Appendix: Installing and Using Eclipse
Instructor: (FB 150,

Shortcuts (MSFT)/Commands
Block quote/unquote (CTRL-/)
Run project (CTRL-F11)
Search project for strings (Select project, SearchFile)
Step into, over, return (F5, F6, F7)
Copy a project (CTRL-C, CTRL-V)
Copy a package, class file to another project (CTRL_C, CTRL-V)’
Show variable, class, interface (identifier) definition (click, F3 or Right Menu Open Declaration) and return back (ALT )

Find identifier (variable, class, interface) use (Click, CTRL-SHIFT-G, Right MenuReferences)
Refactor (Click, CTRL-SHIFT-R or Right MenuRefactor)
Complete identifier name (CTRL-Space)
Automatic imports (CTRL-SHIFT-O)
Change Method Signature (Click ALT_SHIFT-C, Right MenuRefactor)
Extract interface (Click ALT_SHIFT-C, Right MenuRefactor)

Install JDK
Install Eclipse
Connect JDK to Eclipse
Create project
Edit project run project
Restore window
Search project for strings
Adding a library
Add an existing project
Copy a project
Copy a package, class file to another project
Delete a project

Show variable, class, interface (identifier) definition and return back
Find identifier (variable, class, interface) use
Complete identifier name
Understand, fix errors
Automatic imports
Change Method Signature
Extract interface
Supply main argument
Create project from existing code

http://www.oracle.com/technetwork/java/javase/downloads/index.html

Check with instructor which JDK version to get

Follow Download Link: Accept License Agreement, Find JDK for Appropriate Platform, and Click on exe Link to Download EXE in some temporary folder

Run Exe and Choose JDK Folder

Download from www.eclipse.org (Windows)

Get the latest IDE for Java Developers, not Indigo

Download from www.eclipse.org (Windows)

Get the latest IDE for Java Developers, not Indigo

Extract All

Select Destination Folder

Create some kind of Shortcut for Eclipse.exe

Run Eclipse.exe

Specify Projects Directory

Remove Welcome Tab if it Appears

Change the Java Version: WindowPreferences

Press Search Browse Button

Press Search Browse Button to Installed JDK

Jre added to Eclipse, Select it and Can Execute Without Errors

Some Explicit Instructions – for MAC (assume Java 7)

You can get that for mac here:
https://www.oracle.com/technetwork/java/javase/downloads/jdk10-downloads-4416644.html. Pick the Mac option and from there it should just be like installing any other application.
Or you can go here:
http://download.oracle.com/otn-pub/java/jdk/7u40-b43/jdk-7u40-macosx-x64.dmg

The problem is Eclipse won’t change the compiler to use 1.7 so you will have to specify that under:
Eclipse -> Preferences -> Java -> Installed JREs
Click “Add…” then choose “MacOS X VM”
Next, then under directory copy/paste this:
/Library/Java/JavaVirtualMachines/jdk1.7.0_40.jdk/Contents/Home
Make sure it recognizes this as Java SE 7. Then name doesn’t really matter.

Now go to:
Eclipse -> Preferences -> Java -> Compiler
Change the compliance level to: “1.7”

Now it probably still won’t work (at least it didn’t on mine)
This is because your project is still set on 1.6

So, go to:
Project -> Properties -> Java Build Path -> Libraries
Add Library…
JRE System Library
“Workspace default” should be automatically there as the 1.7, but if not find the 1.7 library.
Then remove the 1.6 library
Also you need to change the compiler being used by the project:
Project -> Properties -> Java Compiler
and make sure everything is on 1.7

Now, if you’re getting an error about the main class not being found or working.
You may just want to create a new project and when you select the 1.7 JRE.

Add a Project

Project Name and Separate Folders

The separate folder option puts .java source files in src folder and .class files in bin folder – required for the auto grader

Switch to Java Perspective (May get this message)

Empty Project Created

Install JDK
Install Eclipse
Connect JDK to Eclipse
Create project
Edit run project
Restore window
Search project for strings
Adding a library
Add an existing project
Copy a project
Copy a package, class file to another project
Delete a project

Add a Package to Selected Project

Select project and File Package

Enter Package Name

Empty Package in Non Empty Project

Add a Class

Select project and File Class

Name the Class

Empty Class in Non Empty Package

Edit the File (Copy and Paste Code)
package warmup;
import java.io.BufferedReader;
import java.io.InputStreamReader;
public class AGreeter {
static BufferedReader inputStream = new BufferedReader(new InputStreamReader(System.in));
public static void main(String[] args) {
System.out.println(“Hello World”);
if (args.length > 0) {
System.out.println(args[0]);
System.out.println (inputStream.readLine());
} catch (Exception e) {
System.out.println(“Could not read line”);
e.printStackTrace();
Copy and paste code from:

Save (and Compile) the File

FileSave or CTRL+S

Workspace, Project, Source Package  Folder

Source Package
Class Source

Workspace, Project, Binary Package  Folder

Binary Package
Class Object (Binary) Code

Execute the Main Method on Selected Class

Right MenuDebug As Java Application
Can also select Run but Debug is more defensive

Find or Switch Workspace Folder: FileSwitch Workspace

Find Project Folder: Select Project, Right ClickPropertiesResource

View Output in Console Window

Provide Input in Console Window

The Output after Enter

Closing a Window perhaps accidentally
Hide Console

Vanished Console

WindowReset Perspective

WindowShow View
Can selectively remove and add sub-windows/views

File Search in a Project (useful in Java Teaching and Your projects)
Suppose you want to search the entire project for some string such as some text in a Sakai question: such as “println(c) displays”

Select Project

Select project (not the src folder)
Suppose you want to search the entire project for some string such as some text in a Sakai question: such as “println(c) displays”

FileSearch

Search Dialog
Search string
Scope of search

Search Results

Search view shown, console in another tab

Search Results Zoomed
Look at all the tabs availalale here

Multi File Text Search for Println

Search Results

Text search, shows uncommented println() also
Use CTR+SHIFT+G (shown earlier) to find active uses of the method

Setting a Break Point

Double click where you want program to stop

Starting the Debugger

Stopping at Breakpoint

Debug Perspective

Next statement to be executed

Examining Main Parameters

Main Parameters

Stepping to next statement

Next Statement

and Local Variable

Index gets initialized

println() executed

Call stack

Called method parameters

Step Return

Returning to Java Perspective

Debug Last Main Launched: F11
No need to select a main class

Library Location on the Web
Click on the latest version (on my web page, not this page) to download the jar (same as zip) and do not unzip/unjar it

Download Library to Local Computer

Do not unzip/unjar it

Select Project, and ProjectProperties

Must do this for each project!

Select Build Path, Add External Jar

Select Saved Jar

Select Build Path, Projects

Remove Spurious Projects (if any)

Press Ok to Commit

Create a Project out of Existing Code: FileNewJava Project

Uncheck Default Location Box

Enter Location and Name

But it will have errors because of missing ObjectEditor library

Copying a Project

Select project, CTRL CTRL-V

Copy Types (Classes, Interfaces, Enums) from Package to Another: Copy

Select type(s) in source project and package and press CTRL-C (or FileCopy right menu item)

Copy Types from One Package to Another: Paste
Select package in destination project and package and press CTRL-V (or FilePaste right menu item)

Copying Classes from One Package to Another: in new Package and Project
Repackaged type added (and its imports are changed to other copied types if multiple types are copied and pasted together)

Package name changed

Deleting a Project

Right click project and delete. Usually not a good idea to delete project on disk, can always use the OS to do so, which will put it in the recycling bin

Jumping to Identifier Definition and Navigation Stack
F3 when cursor is a start of an identifier

Makes Eclipse take you to the definition of the identifier in an edit window

Cursor position
ALT + Back Arrow takes you back where you came from, a la Browser back button, can execute multiple times to back in in the stack of visited points
ALT + Forward Arrow goes forwards in the navigation stack a la browser forward button

Find the Uses

CTRL-SHIFT-G when cursor is a start of an identifier
Cursor position

Makes Eclipse show the methods that reference the identifier in the search tab
Double clicking a method reference

Makes Eclipse show the method and highlight all references of the identifier

MenuRefactorRename Identifier: ALT + Shift + R

Select type, right menuRefactorRename
All references will be updated!

Complete Identifier: Ctrl + Space after Prefix
public static final long NUMBER_OF_LARGE_FACTORIAL_COMPUTATIONS = 1000000;

Give file name

Understand and Correct Errors

Hover to understand

Click for correction proposal

Correct All Import Errors in File: Ctrl + Shift + O

In Eclipse press CTRL-SHIFT-O to automatically import all used types that need to be imported but have not been imported
If class is in more than one package, Eclipse gives a choice
All unused imports are also removed
Can select multiple types o

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