In  this tutorial, we will see “How to find Duplicate Characters and their count in a String using Java 8?”

Find Duplicate Characters in String in Java 8

Java 8 – How to find Duplicate Characters and their Count in a String? Click To Tweet

 

Output:

check if text or string present in a file using java 8

In  above example, we first uses the chars() method to generate a stream of the characters in the original string. Then we uses the mapToObj method to convert the int values of the characters to their corresponding char values. After that, we uses the groupingBy collector to group the characters by their value, creating a map where the keys are the unique characters in the string and the values are the number of occurrences of each character. And at last, we filters the map to only include characters that occur more than once and then using the forEach method, prints out the duplicate characters and their count.

Find Duplicate Characters in String in Java 8

skip method java 8 stream

Java 8 – How to find Duplicate Characters and their Count in a String? Click To Tweet

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Author

  • Deepak Verma

    Deepak Verma is a Test Automation Consultant and Software development Engineer for more than 10 years. His mission is to help you become an In-demand full stack automation tester. He is also the founder of Techndeck, a blog and online coaching platform dedicated to helping you succeed with all the automation basics to advanced testing automation tricks.

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