What are the annotation methods in java

1. Comment a line (the shortcut key in eclipse is: crtl /). Press the shortcut key once to comment, and press it again to uncomment

//内容 
//内容

2. Comment multiple lines and block comments (the shortcut key in eclipse is: crtl shift /). Press the shortcut key once to comment, and press it again to cancel the comment. It can only be deleted manually.

/*内容
内容
内容*/

3. Document comments (the shortcut key in eclipse is: /** enter). Click the shortcut key to comment. Only this comment method can be written into the javadoc document

/** 内容
*内容
*内容
*/

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