How to remove duplicate characters from String in Java?

In this tutorial, we are sharing how to remove duplicate characters from String in Java.

For example, if given String is “aaaaaa” then output should be “a”, because rest of  the “a” are duplicates. Similarly, if the input is “abcd” then output should also be “abcd” because there is no duplicate character in this String.

Java Program to remove duplicate characters from String

Copy the below program and executive it to see the output.

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