Merge pull request #3846 from ziameraj16/ziameraj16-challenge-107

Java solution for Self Descriptive Number

2 files changed, 52 insertions, 26 deletions

diff --git a/challenge-107/ziameraj16/README.md b/challenge-107/ziameraj16/README.md
index 4e1a6ecc5e..e7bf263e77 100644
--- a/challenge-107/ziameraj16/README.md
+++ b/challenge-107/ziameraj16/README.md
@@ -1,37 +1,19 @@
-# Maximum Gap
+# Self Descriptive Number
 ## Java Solution
 
 To compile the code run
 ```java
-javac MaximumGap.java
+javac SelfDescriptiveNumber.java
 ```
 To run
 ```java
-java MaximumGap
+java SelfDescriptiveNumber
 ```
 ### Example
 ```bash
-/perlweeklychallenge-club/challenge-106/ziameraj16/java$ javac MaximumGap.java
-/perlweeklychallenge-club/challenge-106/ziameraj16/java$ java MaximumGap
-Enter comma separated values
-2,9,3,5
-4
-```
-## Kotlin Solution
-
-To compile the code run
-```java
-kotlinc MaximumGap.kt
-```
-To run
-```java
-kotlin MaximumGap
-```
-### Example
-```bash
-/perlweeklychallenge-club/challenge-106/ziameraj16/kotlin$ kotlinc MaximumGapKotlin.kt
-/perlweeklychallenge-club/challenge-106/ziameraj16/kotlin$ kotlin MaximumGapKotlin
-Enter comma separated values
-1,3,8,2,0
-5
+/perlweeklychallenge-club/challenge-107/ziameraj16/java$ javac SelfDescriptiveNumber.java
+/perlweeklychallenge-club/challenge-107/ziameraj16/java$ java SelfDescriptiveNumber
+1210
+2020
+21200
 ```
diff --git a/challenge-107/ziameraj16/java/SelfDescriptiveNumber.java b/challenge-107/ziameraj16/java/SelfDescriptiveNumber.java
new file mode 100644
index 0000000000..acfa046fff
--- /dev/null
+++ b/challenge-107/ziameraj16/java/SelfDescriptiveNumber.java
@@ -0,0 +1,44 @@
+
+import java.util.HashMap;
+import java.util.Map;
+
+public class SelfDescriptiveNumber {
+
+    public static void main(String[] args) {
+        int count = 0;
+        int i = 1;
+        while (true) {
+            if (count == 3) {
+                break;
+            }
+            if (isSelfDescriptiveNumber(i)) {
+                System.out.println(i);
+                count++;
+            }
+            i++;
+        }
+    }
+
+    private static boolean isSelfDescriptiveNumber(int number) {
+        String valueAsString = Integer.valueOf(number).toString();
+        Map<Integer, Integer> map = new HashMap(valueAsString.length());
+        for (int i = 0; i < valueAsString.length(); i++) {
+            final int c = Character.getNumericValue(valueAsString.charAt(i));
+            if (map.containsKey(c)) {
+                map.put(c, map.get(c) + 1);
+            } else {
+                map.put(c, 1);
+            }
+        }
+        for (int i = 0; i < valueAsString.length(); i++) {
+            int c = Character.getNumericValue(valueAsString.charAt(i));
+            if (map.getOrDefault(i, 0) != c) {
+                return false;
+            }
+        }
+        return true;
+    }
+
+
+}
+