Java determines whether it is in an array

java determines whether it is in the array

First use Arrays.asList to convert the array into a List; Then use the Arrays.contains(s) method to determine whether the s variable is in the array.

The code is as follows:

String[] str={"q","w"};
String s="q";
        
System.out.println(Arrays.asList(str));//先将数组转换为List
System.out.println(Arrays.asList(str).contains(s));
Set<String> set = new HashSet<>(Arrays.asList(str));
System.out.println(set.contains(s));

Running results:

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