create - 튜플 문제풀이

src/main/java/programmers/level2/동성_튜플.java

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+package programmers.level2;
+
+import java.util.*;
+public class 동성_튜플 {
+    public int[] solution(String s) {
+
+        String str[]=s.split("");
+        ArrayList<ArrayList>arraylist=new ArrayList<>();
+        int i=1;
+        for (;i<str.length-1;i++) {
+            // System.out.println(str[i]);
+            String value=str[i];
+
+            if (value.equals("{")) {
+
+                String temp="";
+                for (int j=i+1;j<str.length-1;j++) {
+                    if (str[j].equals("}")) {
+                        // System.out.println(templist.toString());
+                        // System.out.println(temp);
+                        String tempArr[]=temp.split(",");
+                        // System.out.println(Arrays.toString(tempArr));
+                        ArrayList<String>templist=new ArrayList<>(Arrays.asList(tempArr));
+                        arraylist.add(templist);
+                        break;
+                    }
+                    else {
+                        // templist.add(str[j]);
+                        temp+=str[j];
+                    }
+                }
+            }
+
+
+        }
+
+        // System.out.println(arraylist.toString());
+        // 2. arraylist 개수 만큼 오름차순
+        Collections.sort(arraylist,(o1,o2)->(o1.size()-(o2.size())));
+        // System.out.println(arraylist.toString());
+
+        ArrayList<String>resultList=new ArrayList<>();
+        HashSet<String>hashset=new HashSet<>();
+
+        for (ArrayList arr:arraylist) {
+
+            // System.out.println(arr.toString());
+            // System.out.println(arr.size());
+            for (int k=0;k<arr.size();k++) {
+                // System.out.println("k:"+arr.get(k));
+                String val=(String)arr.get(k); // 캐스팅 해줘야함.
+                if (!hashset.contains(val)) {
+                    hashset.add(val);
+                    resultList.add(val);
+                }
+            }
+        }
+
+
+        // System.out.println(resultList.toString());
+        int[] answer = new int[resultList.size()];
+        for (int k=0;k<resultList.size();k++) {
+            answer[k]=Integer.parseInt(resultList.get(k));
+        }
+
+
+        return answer;
+    }
+}