blocks|key|4180055|text|您可以使用String类中提供的matches方法。|type|unstyled|depth|inlineStyleRanges|offset|length|style|CODE|entityRanges|data|4180056|if(pouch.getStatus().matches("Finalized%7CReady%7CCheckout%7CConfirmed%7CBook%7CStarted%7CInital%7CClose")){
+++//your+implementation+goes+here
}|code-block|syntax|javascript|4180057|entityMap^0|5|6|G|7|0|0^^$0|@$1|2|3|4|5|6|7|M|8|@$9|N|A|O|B|C]|$9|P|A|Q|B|C]]|D|@]|E|$]]|$1|F|3|G|5|H|7|R|8|@]|D|@]|E|$I|J]]|$1|K|3|-4|5|6|7|S|8|@]|D|@]|E|$]]]|L|$]]

You can use the method <code>matches</code> which is available in <code>String</code> class,

<pre><code>if(pouch.getStatus().matches("Finalized|Ready|Checkout|Confirmed|Book|Started|Inital|Close")){
 //your implementation goes here
}
</code></pre>

blocks|key|4179181|text|List<String>+listOfInputs+=+new+ArrayList<String>();
//+add+elements+in+listOfInputs...++
boolean+isAvailable+=+listOfInputs.contains(pouch.getStatus());|type|code-block|depth|inlineStyleRanges|entityRanges|data|syntax|javascript|4179182|unstyled|entityMap^0|0^^$0|@$1|2|3|4|5|6|7|G|8|@]|9|@]|A|$B|C]]|$1|D|3|-4|5|E|7|H|8|@]|9|@]|A|$]]]|F|$]]

<pre><code>List&lt;String&gt; listOfInputs = new ArrayList&lt;String&gt;();
// add elements in listOfInputs... 
boolean isAvailable = listOfInputs.contains(pouch.getStatus());
</code></pre>

blocks|key|4179218|text|您可以创建自定义函数：|type|unstyled|depth|inlineStyleRanges|entityRanges|data|4179219|static+boolean+inCondition(String+var,+String...+ins)+{
++++for+(String+in+:+ins)+{
++++++++if+(in.equals(var))+return+true;
++++}

++++return+false;
}|code-block|syntax|javascript|4179220|然后这样使用它：|4179221|public+static+void+main(String[]+args)+{
++++String+pouch+=+"Ready";
++++if+(inCondition(pouch,+"Finalized",+"Ready",+"Checkout"+...+))+{
++++++++//+do+something
++++}
}|4179222|entityMap^0|0|0|0|0^^$0|@$1|2|3|4|5|6|7|M|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|N|8|@]|9|@]|A|$E|F]]|$1|G|3|H|5|6|7|O|8|@]|9|@]|A|$]]|$1|I|3|J|5|D|7|P|8|@]|9|@]|A|$E|F]]|$1|K|3|-4|5|6|7|Q|8|@]|9|@]|A|$]]]|L|$]]

You can create custom function:

<pre><code>static boolean inCondition(String var, String... ins) {
 for (String in : ins) {
 if (in.equals(var)) return true;
 }

 return false;
}
</code></pre>

and then use it in this way:

<pre><code>public static void main(String[] args) {
 String pouch = "Ready";
 if (inCondition(pouch, "Finalized", "Ready", "Checkout" ... )) {
 // do something
 }
}
</code></pre>

blocks|key|4179261|text|下面的代码片段可能会对你有所帮助。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|4179262|+String+status+=+"COMPLETED";
+List<String>+statusList+=+new+ArrayList<>(Arrays.asList("COMPLETED","INPROGRESS"));
+if(statusList.contains(status)){
+++++//+do+your+stuff
+}|code-block|syntax|javascript|4179263|entityMap^0|0|0^^$0|@$1|2|3|4|5|6|7|I|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|J|8|@]|9|@]|A|$E|F]]|$1|G|3|-4|5|6|7|K|8|@]|9|@]|A|$]]]|H|$]]

Below snippet might help you.

<pre><code> String status = "COMPLETED";
 List&lt;String&gt; statusList = new ArrayList&lt;&gt;(Arrays.asList("COMPLETED","INPROGRESS"));
 if(statusList.contains(status)){
 // do your stuff
 }
</code></pre>

blocks|key|4179393|text|先使用Arrays.asList，再使用contains可能是最好的方式，至少在我的情况下是这样。|type|unstyled|depth|inlineStyleRanges|offset|length|style|CODE|entityRanges|data|4179394|if(Arrays.asList("Finalized",+"Ready",+"Checkout",+"Confirmed",+
++++"Book",+"Started",+"Inital",+"Close").contains(pouch.getStatus()))+{

+++//+Body
}|code-block|syntax|javascript|4179395|entityMap^0|3|D|K|8|0|0^^$0|@$1|2|3|4|5|6|7|M|8|@$9|N|A|O|B|C]|$9|P|A|Q|B|C]]|D|@]|E|$]]|$1|F|3|G|5|H|7|R|8|@]|D|@]|E|$I|J]]|$1|K|3|-4|5|6|7|S|8|@]|D|@]|E|$]]]|L|$]]

Using <code>Arrays.asList</code> and then use <code>contains</code> might be the best way at least on my case. 

<pre><code>if(Arrays.asList("Finalized", "Ready", "Checkout", "Confirmed", 
 "Book", "Started", "Inital", "Close").contains(pouch.getStatus())) {

 // Body
}
</code></pre>

blocks|key|4180011|text|我认为如果你使用"switch“条件，代码读起来会更好：|type|unstyled|depth|inlineStyleRanges|entityRanges|data|4180012|switch+(pouch.getStatus())+{
++++++++++++case+"Finalized":
++++++++++++case+"Ready":
++++++++++++case+"Checkout":
++++++++++++case+"Confirmed":
++++++++++++case+"Book":
++++++++++++case+"Started":
++++++++++++case+"Inital":
++++++++++++case+"Close":
++++++++++++++++//+your+code
++++++++++++++++break;
++++++++}|code-block|syntax|javascript|4180013|entityMap^0|0|0^^$0|@$1|2|3|4|5|6|7|I|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|J|8|@]|9|@]|A|$E|F]]|$1|G|3|-4|5|6|7|K|8|@]|9|@]|A|$]]]|H|$]]

I think if you use the "switch" conditional, the code reads better:

<pre><code>switch (pouch.getStatus()) {
 case "Finalized":
 case "Ready":
 case "Checkout":
 case "Confirmed":
 case "Book":
 case "Started":
 case "Inital":
 case "Close":
 // your code
 break;
 }
</code></pre>

blocks|key|4179428|text|下面是完整的示例|type|unstyled|depth|inlineStyleRanges|entityRanges|data|4179429|public+class+InConditionJava+{

++++public+static+void+main(String[]+args)+{
++++++++//+TODO+Auto-generated+method+stub

++++++++String[]+arr+=+{+"Finalized",+"Ready",+"Checkout"+};
++++++++checkData(arr);
++++}

++++private+static+void+checkData(String[]+arr)+{
++++++++Set<String>+names+=+new+HashSet<String>(Arrays.asList(arr));

++++++++System.out.println("AS+Checkout+is+there+in+our+arr+is+should+return+True>>"+%2B+names.contains("Checkout"));+//+true
++++++++System.out.println(names.contains("Book"));+//+false
++++}

}|code-block|syntax|javascript|4179430|​|4179431|📷|atomic|offset|length|4179432|4179433|entityMap|0|IMAGE|mutability|IMMUTABLE|imageUrl|https://ask.qcloudimg.com/http-save/yehe-900000/7d3cd783ffec1a395ca1a36f97c3ae4d.png|imageAlt^0|0|0|0|0|1|0|0|0^^$0|@$1|2|3|4|5|6|7|X|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|Y|8|@]|9|@]|A|$E|F]]|$1|G|3|H|5|6|7|Z|8|@]|9|@]|A|$]]|$1|I|3|J|5|K|7|10|8|@]|9|@$L|11|M|12|1|13]]|A|$]]|$1|N|3|H|5|6|7|14|8|@]|9|@]|A|$]]|$1|O|3|-4|5|6|7|15|8|@]|9|@]|A|$]]]|P|$Q|$5|R|S|T|A|$U|V|W|-4]]]]

Here is full example 

<pre><code>public class InConditionJava {

 public static void main(String[] args) {
 // TODO Auto-generated method stub

 String[] arr = { "Finalized", "Ready", "Checkout" };
 checkData(arr);
 }

 private static void checkData(String[] arr) {
 Set&lt;String&gt; names = new HashSet&lt;String&gt;(Arrays.asList(arr));

 System.out.println("AS Checkout is there in our arr is should return True&gt;&gt;" + names.contains("Checkout")); // true
 System.out.println(names.contains("Book")); // false
 }

}
</code></pre>

<a href="https://i.stack.imgur.com/GAFtl.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/GAFtl.png" alt="Eclipse demo"></a>

blocks|key|4179467|text|这里已经有很多选项，但是如果您使用的Stream版本是>=+8，您也可以使用JDK来完成此任务：|type|unstyled|depth|inlineStyleRanges|offset|length|style|CODE|entityRanges|data|4179468|String+status+=+pouch.getStatus();
if+(Stream.of(
++++++++"Finalized",
++++++++"Ready",
++++++++"Checkout",
++++++++"Confirmed",
++++++++"Book",
++++++++"Started",
++++++++"Inital",
++++++++"Close")
++++++++.anyMatch(status::equals))+{
++++//+Body
}|code-block|syntax|javascript|4179469|与Collection#contains相比，这种方法的缺点是必须确保pouch.getStatus()不为空，否则将得到NullPointerException。|4179470|entityMap^0|I|6|0|0|1|J|Z|H|1P|K|0^^$0|@$1|2|3|4|5|6|7|O|8|@$9|P|A|Q|B|C]]|D|@]|E|$]]|$1|F|3|G|5|H|7|R|8|@]|D|@]|E|$I|J]]|$1|K|3|L|5|6|7|S|8|@$9|T|A|U|B|C]|$9|V|A|W|B|C]|$9|X|A|Y|B|C]]|D|@]|E|$]]|$1|M|3|-4|5|6|7|Z|8|@]|D|@]|E|$]]]|N|$]]

There are already plenty of options here, but you could also use <code>Stream</code> for this task, if the version of the JDK you are using is >= 8:

<pre><code>String status = pouch.getStatus();
if (Stream.of(
 "Finalized",
 "Ready",
 "Checkout",
 "Confirmed",
 "Book",
 "Started",
 "Inital",
 "Close")
 .anyMatch(status::equals)) {
 // Body
}
</code></pre>

The downside of this method, compared to <code>Collection#contains</code>, is that you must make sure that <code>pouch.getStatus()</code> is not null, otherwise you will get a <code>NullPointerException</code>.

blocks|key|4180207|text|这是另一种方法，在一行中初始化所有状态的列表，然后检查列表是否包含给定的状态。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|4180208|//+Java+9+way+of+initializing+List+with+one+line++++++++
List<String>+statuses+=+List.of("Finalized",+"Ready",+"Checkout",+"Confirmed",
++++"Book",+"Started",+"Inital",+"Close");
if+(statuses.contains(pouch.getStatus()))+{
++//+Body
}|code-block|syntax|javascript|4180209|entityMap^0|0|0^^$0|@$1|2|3|4|5|6|7|I|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|J|8|@]|9|@]|A|$E|F]]|$1|G|3|-4|5|6|7|K|8|@]|9|@]|A|$]]]|H|$]]

Here is another way of initializing List in one line with all statuses, and then checking if the list contains the given status.

<pre><code>// Java 9 way of initializing List with one line 
List&lt;String&gt; statuses = List.of("Finalized", "Ready", "Checkout", "Confirmed",
 "Book", "Started", "Inital", "Close");
if (statuses.contains(pouch.getStatus())) {
 // Body
}
</code></pre>

blocks|key|4179580|text|您可以创建一个所有状态的数组，然后检查pouch.getStatus()是否在该列表中？|type|unstyled|depth|inlineStyleRanges|entityRanges|data|4179581|+public+String[]+statusArray+=+new+String[]{++"Finalized",+"Ready","Checkout","Confirmed",++"Book",++"Started",+"Inital",+"Close"};

if(+Arrays.asList(statusArray).contains(pouch.getStatus())){
+//do+something+
}|code-block|syntax|javascript|4179582|entityMap^0|0|0^^$0|@$1|2|3|4|5|6|7|I|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|J|8|@]|9|@]|A|$E|F]]|$1|G|3|-4|5|6|7|K|8|@]|9|@]|A|$]]]|H|$]]

You can create an array of all status, then check if pouch.getStatus() in in that list or not?

<pre><code> public String[] statusArray = new String[]{ "Finalized", "Ready","Checkout","Confirmed", "Book", "Started", "Inital", "Close"};

if( Arrays.asList(statusArray).contains(pouch.getStatus())){
 //do something 
}
</code></pre>

I have multiple conditions to check as shown below,

<pre><code>if(pouch.getStatus().equals("Finalized") || pouch.getStatus().equals("Ready") 
 || pouch.getStatus().equals("Checkout") || pouch.getStatus().equals("Confirmed")
 || pouch.getStatus().equals("Book") || pouch.getStatus().equals("Started")
 || pouch.getStatus().equals("Inital") || pouch.getStatus().equals("Close")) {
 // Body Implementation
}
</code></pre>

Is there any easy way to check above conditions similar like SQL <code>IN</code>condition, so that code look simpler?

SQL IN condition in Java

我有多个条件需要检查，如下所示：if(pouch.getStatus().equals("Finalized") || pouch.getStatus().equals("Ready")   || pouch.getStatus().equals("Checkout") || pouch.getStatus().equals("Confirmed")  || pouch.getStatus().e

问Java中的SQL IN条件
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回答 10

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