Java是否有“IN”运算符或函数像SQL？ [英] Does Java have a "IN" operator or function like SQL?

问题描述

  if（string in arrayArray）{ 
 ... 
} 
  

我知道我可以为此创建一个函数但是我只想知道Java是否已经有了这个功能。

谢谢！

解决方案

有很多集合可以让你做类似的事情。例如：使用

html＃contains％28java.lang.CharSequence％29rel =noreferrer> Strings ：

  String s =我可以有cheezeburger？; 
布尔hasCheese = s.contains（cheeze）; 
  

或 Collections ：

 列表< String> listOfStrings = new ArrayList< String>（）; 
 boolean hasString = listOfStrings.contains（something）; 
  

然而，对于简单的 String [] 。

I want to know if there's a way of doing something like this in Java :

if(word in stringArray) {
  ...
}

I know I can make a function for this but I just want to know if Java has already something for this.

Thank you!

解决方案

There are many collections that will let you do something similar to that. For example:

With Strings:

String s = "I can has cheezeburger?";
boolean hasCheese = s.contains("cheeze");

or with Collections:

List<String> listOfStrings = new ArrayList<String>();
boolean hasString = listOfStrings.contains(something);

However, there is no similar construct for a simple String[].

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