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Eclipse is open source code Based on Java Extensible development platform. In itself, it is just a framework and a set of services for building development environments through plug-in components. Fortunately, Eclipse comes with a standard set of plug-ins, including Java development tool(Java Development Kit，JDK)

Download path

Link: https://pan.baidu.com/s/1I_CkHXY5q_mJQFs IUCXWw Extraction Code: rnxb

install

decompression

Running (Java,Javac environment variables need to be configured first)

Next step (the working directory is optional, check)

Next OK, Enter Success

Basic usage and configuration of eclipse

1:Basic use
	A:Establish Java Item:
		//Click File or in the left-most margin, select the Java project, write a project name in the interface, and then Finish.
	B:Create packages: Expand projects in source packages src Create a package below com.itheima
	C:Create classes: In com.ithiema Create a class under the package HelloWorld
		//Write a class name in the interface: HelloWorld, and then finish.
	D:Writing code
		//Write main method in HelloWorld class, write an output statement in main method: I am a black horse programmer, I am proud, I am proud.
	E:Compile
		//Auto-compiler. Help you do it at the moment of saving.
	F:Function
		//Select the file to run or in the content of the file to run
		//Right-click -- Run as - Java Application
		
2:Basic configuration
	A:Display and Hide of Line Numbers
		//Display: Right-click Show Line Numbers in the leftmost blank area of the code area.
		//Hide: Do the above action again.
			
	B:Font size and color
		a:Java The font size and color of the code area:
			window -- Preferences -- General -- Appearance -- Colors And Fonts -- Java -- Java Edit Text Font
		b:Console
			window -- Preferences -- General -- Appearance -- Colors And Fonts -- Debug -- Console font
		c:Other documents
			window -- Preferences -- General -- Appearance -- Colors And Fonts -- Basic -- Text Font
			
	C:What if the form is messed up??
		window -- Perspective -- Reset Perspective
			
	D:I can't find the console. What should I do??
		Window--Show View—Console
		
3:Delete and import items
	A:delete item
		//Select the item - Right-click - Delete
		//Delete from the project area
		//you remove it from your hard disk
	B:Import project
		//Right-click in the project area to find import
		//Find General, expand, and find
		Existing Projects into Workspace
		//Click next, and then select the project you want to import
		//Note: The project name is chosen here.

Shortcut keys

package com.itheima;

/*
 * Content Auxiliary Key: alt+/
 * 			a.main Method
 * 			    main,Then alt+/, return.
 * 			b.Output statement
 * 				syso,Then alt+/, return.
 * Shortcut keys:
 * 		a.Notes
 * 			Single-line selection, ctr+/, cancel again
 * 			Multi-line selection, ctr+shift +/, cancel ctr+shift +\
 * 		b.Format
 * 			ctrl+shift+f
 * 			Or right-click -- Source --Format
 */
public class KeyDemo {
	public static void main(String[] args) {
		System.out.println("HelloWorld");
		System.out.println("HelloWorld");
		System.out.println("HelloWorld");
		System.out.println("HelloWorld");
		System.out.println("HelloWorld");
		System.out.println("HelloWorld");
		System.out.println("HelloWorld");
	}
}