单行注释: 注释一行文字 //开头
多行注释: /* 多行注释*/
文档注释:JavaDoc /** */
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网上还可搜索:有趣的代码注释,会有各种各样的形状(超级有趣)
步骤:左上角 file——settings——Editor—— Color Scheme—— java—— Comments(注释)—— 右手边随机修改——apply——OK