Java / Programs
Write a Java program to find the last repeating character in a String.
The below program is implemented using Java 8.
public class LastOccuranceOfRepeatingChar { public static void main(String[] args) { String str = "abcdklja"; Set<Integer> myTempHashSet = new HashSet<>(); str.codePoints().filter(i -> myTempHashSet.add(i) == false).reduce((first, second) -> second) .ifPresent(c -> System.out.println("Last repeating char: " + (char) c)); } }
The below version is for Java 7 or less.
public class LastOccuranceOfRepeatingCharJava7 { public static void main(String[] args) { String str = "abcdklja"; Set<Character> myTempHashSet = new HashSet<>(); char lastChar = 0; for (int i = 0; i < str.length(); i++) { if (myTempHashSet.add(str.charAt(i)) == false) { lastChar = str.charAt(i); } } System.out.println("Last repeating char: " + lastChar); } }
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