The Simplest Solution: String. toLowerCase() . In this case, we’ll transform both strings to lowercase and then use the contains() method: assertTrue(src. toLowerCase().
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You know keys in the java. util. HashMap are case sensitive . It means you can keep both “abc” and “ABC” as keys in the same map.
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Also, TreeMap uses a Comparator to find if an inserted key is a duplicate or a new one. Therefore, if we provide a case-insensitive String Comparator, we’ll get a case-insensitive TreeMap . which we can supply in the constructor: Map<String, Integer> treeMap = new TreeMap<>(String.26 May 2020
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