1 Eclipse common shortcut keys

ctrl+Q: Jump to the last edit.
ctrl+F: Find and replace in the current file.
ctrl+T: View the inheritance relationship of a class.
#alt+left arrow: Return to the previous position of the cursor.
alt+right arrow: Go to the next position of the cursor.
alt+shift+s: Open the right-click menu. Note that after opening the right-click menu, each item also has shortcut keys. r generates getter/setter methods, v rewrites Or implement the method, o uses attributes to create the constructor, c inherits the parent class constructor class to create the constructor.
ctrl+shift+/: Add block comments.
ctrl+shift+\: Cancel block comments.
ctrl+/: Add or cancel line comments.
alt+shift+L: Extract local variables, such as extracting literal values, and create a reference variable for them.
ctrl+shift+r: Find local resources.
alt+shift+r: Rename.
ctrl+h: Find files containing specified content.
alt+shift+z: Add try---catch to the selected code.
alt+shift+z+3: Wrap the selected code into an if statement.
alt+up arrow/down arrow: Place the cursor on a line and move the line up or down.
ctrl+alt+up arrow/down arrow: Copy a line up or down.
alt+shift+M: Create a method for the selected code.
alt+shift+x, t: Run with JUnit.
alt+?: Display the content that can be inserted at the current position; output the selected content through System.out.println.
shift+enter: Insert a blank line below the current line.
alt+shift+A: Turn on or off multi-line editing mode.

A: Environment configuration for compiling and running the program (generally not changed)

Low compilation, high execution. Can.

High compile, low run. Can't.

It is recommended that the compiled and running versions be consistent.

window – Preferences – Java

Compilation environment: Compiler selects the highest version by default.

Running environment: Installed JREs will look for the JDK you installed by default. It is recommended to configure Java environment variables.

Question:

B: How to remove the default comments?

window – Preferences – Java – Code Style – Code Templates

Select the content you don’t want and edit it through Edit on the right.

Note: Please delete only the comment part, do not delete anything that is not a comment part.

C: Display and hide line numbers

Display: In the leftmost blank area of the code area, right-click – Show Line Numbers are enough.

Hide: Do the above action again.

D: Font size and color

window – Preferences – General – Appearance – Colors And Fonts – Basic – Text Font

window – Preferences – General – Appearance – Colors And Fonts – Debug – Console font

window – Preferences – General – Appearance – Colors And Fonts –Java modification – Java Edit Text Font

a: Font size and color of Java code area:

b: Console

c: Other files

E: The form is messed up, what should I do?

window – Reset Perspective

F: The console cannot be found, what should I do?

Window–Show View—Console

G: Cancel the hover prompt

window – Preferences – Java–Editor–Hovers. Uncheck Combined Hover on the right.

In this way, the floating box of the code will not appear automatically. If you want to see the prompt, hover the cursor over the code and press F2.

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