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This article mainly explains "how to use automatic completion in intellij idea". The explanation content in this article is simple and clear, easy to learn and understand. Please follow the idea of Xiaobian slowly and deeply to study and learn "how to use automatic completion in intellij idea" together!

Declare variable output "keivn".var, press Enter, get the following code: String keivn = "keivn";=null judge "".null if ("" == null) {}!= null judge "".notnull or "".nnif ("" != null) {}if judgment 1==2.if if (1==2) {} return value "return".return return "return";List list = Arrays.asList(1, 2, 3);for loop list.for or list.iterfor (Integer integer : list) {} index for loop list.forifor (int i = 0; i

= 0; i--) {}boolean isTrue = false; negated isTrue.not ! isTrue type conversion "123".cast (() "123")try-catchint a=12;.try try { int a=12;} catch (Exception e) { e.printStackTrace();}String abc = "abc";switch structure abc.switch switch (abc) { } Enclose abc.par with parentheses (abc)Lock the current object synchronously abc.synchronized synchronized (abc) { }Optional operation "".optOptional.of("") or Optional.ofNullable("") Thank you for reading, the above is the content of "how to use automatic completion in intellij idea", after learning this article, I believe everyone has a deeper understanding of how to use automatic completion in intellij idea, and the specific use situation still needs to be verified by practice. Here is, Xiaobian will push more articles related to knowledge points for everyone, welcome to pay attention!

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