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Commit 94049c0

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author
Devansh K Shukla
committed
add an if() block along with a condition
1 parent 83d6539 commit 94049c0

2 files changed

Lines changed: 44 additions & 32 deletions

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‎.idea/workspace.xml‎

Lines changed: 40 additions & 31 deletions
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‎src/main/java/io/github/dbc/DuplicateCharactersCounter.java‎

Lines changed: 4 additions & 1 deletion
Original file line numberDiff line numberDiff line change
@@ -10,8 +10,11 @@ public class DuplicateCharactersCounter {
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* @param string String to count duplicate characters.
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* @return Map with characters and their count.
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*/
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public Map<Character, Integer> countDuplicateCharacters(String string) {
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public Map<Character, Integer> countDuplicateCharacters(String string) throws IllegalArgumentException {
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HashMap<Character, Integer> map = new HashMap<>();
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if (string == null) {
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throw new IllegalArgumentException();
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}
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for (int i = 0; i < string.length(); i++) {
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char ch = string.charAt(i);
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if (map.containsKey(ch)) {

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