Java Series Learning (12)-Start eclipse

1. Use Eclipse to write a HelloWorld

(1) Select the Working space

The workspace is actually the directory where we write the source code.

(2) Create a Java project

"File-new-java Project"

(3) Create a package

"To expand the project, build a package Com.kim under the source bundle SRC"

(4) Create a class

"Create a class HelloWorld under the Com.kim package"

(5) Writing code

(6) Compiling

When you click Save, automatically back to save, under the directory, automatically generate class file

(7) Operation

Three ways to run

Way one, click triangle:

Mode two, shortcut keys:

Mode three, right-click to select:

2. Chinese Grade grammar check

(1) Chinese

Under the Dropins folder, pull into the Chinese package to plug in the way.

(2) Grammar check

The main reason that Eclipse is able to check syntax is because eclipse is always watching for keyboard or mouse output actions

3.Eclipse of Windows and views

(1) Windows

Packageexplorer display project structure, packages, classes, and resources

Outline display the structure of the class, easy to find, identify, modify

The result of the Console program running is displayed in the window

Problems Show all syntax and error locations

Hierarchy Show Java inheritance hierarchy, check class by F4

(2) View

By the combination of some windows

Java windows

Debug windows

Basic configuration of 4.Eclipse space

(1) Environment configuration of program compiling and running

Compilation environment: Window-preferences-java-compiler "Highest version selected by default"

Operating environment: window-preferences-java-installed JREs "The JDK you installed will be found by default."

Problem: Low compile, high run, yes, high compile, low run, error, recommended compile and run version consistent

(2 Remove default comment

Window-preferences-java-code Style-code Templates

(3) display and hiding of line numbers

In the left-most blank area of the code area, right--show line numbers

(4) Font size and color

A:java font size and color for code areas

Window--Preferences--general--appearance--Colors and Fonts--Java Modify--Java edit Text Font

B: Output font style for console

Window--Preferences--general--appearance--Colors and Fonts--Debug--Console font

C: Restore Default

Window--preferences--general-restore Defaults

(5) Form restore default

Window--reset Perspective

(6) The console is missing.

Window--show View-console

5. Shortcut keys

(1) Content assist key

ALT +/Hint action

Main + ALT +/; method + ALT +/

(2) Common use of shortcut keys

A: Formatting: Ctrl + SHIFT + F

B: Import Package: Ctrl + Shift +o

C: Comments

Line comment Ctrl +/;

Block Comment Ctrl +shift +/; Ctrl +shift + \;

D: Code moves up and down: ALT + up \ down arrow

E: View Source: F3 or Ctrl + left mouse button

(3). Shortcut keys to quickly improve the development efficiency

A: Automatic generation of non-parametric construction methods

"ALT + SHIFT + S + C +enter"

B: Automatic generation of parameter construction methods

"ALT + Shift +s +o"

C: Automatic generation of Get/set methods

"ALT + SHIFT + S + R + Tab + ENTER +tab +tab +tab +enter"

D: Inheriting abstract classes

E: Inherit interface

5. Hit the jar pack and use the jar package

(1) What is a jar

Jar is a compressed package of multiple class files

(2) What is the jar used for?

Use what someone else has written.

(3) Playing jar bag

Select Item-Right--export-java-Select path-finish

(4) using the JAR package

Copy to the project's root directory, select the JAR package-right--buidpath-add to Build Path

6. Create a Help document

Select Item-Right--export-java-javadoc-Select path-finish

7. Delete the project and import the project

Delete Item: Select item-Right-delete (remove from project/delete from hard drive)

Import Project: Select Item-Right-click-import-general-existing Projects into Workspace-next

8. View the path of your project

Select Item-Right-click-properties-resource-location

9. Debugging with Eclipse

(1) Setting breakpoints

Double-click in front of the code

(2) Commissioning

A: Select Debug View

B: Start Debugging

C: Press F6 Step by step debugging

Java Series Learning (12)-Start eclipse