[POO] aula12 ex2 added

1ano/2semestre/poo/src/aula12/ex2/WordCounterByInitial.java

@@ -0,0 +1,39 @@
+package aula12.ex2;
+
+import java.io.IOException;
+import java.nio.file.Files;
+import java.nio.file.Path;
+import java.util.Arrays;
+import java.util.Scanner;
+import java.util.TreeMap;
+
+public class WordCounterByInitial {
+    public static void main(String[] args) throws IOException {
+        TreeMap<Character, TreeMap<String, Integer>> words = new TreeMap<>() {
+            @Override
+            public String toString() {
+                StringBuilder sb = new StringBuilder();
+                for (Character initial : this.keySet()) {
+                    sb.append(initial).append(": ");
+                    for (String word : this.get(initial).keySet())
+                        sb.append(word).append(", ").append(this.get(initial).get(word)).append("; ");
+                    sb.append("\b\n");
+                }
+                return sb.toString();
+            }
+        };
+
+        Arrays.stream(Files.readString(Path.of((new Scanner(System.in)).nextLine()))
+                .split("[\\s.,:'‘’;?!\\-*{}=+&/()\\[\\]”“\"]+"))
+                .filter(word -> word.length() > 2)
+                .map(String::toLowerCase)
+                .forEach(word -> {
+                    char initial = word.charAt(0);
+                    words.putIfAbsent(initial, new TreeMap<>());
+                    TreeMap<String, Integer> initialWords = words.get(initial);
+                    initialWords.put(word, initialWords.getOrDefault(word, 0) + 1);
+                });
+
+        System.out.println(words);
+    }
+}