Task

Plans.java

@@ -2,10 +2,10 @@ import java.util.HashMap;
 import java.util.Map;
 
 public class Plans {
-    private HashMap<String[], MyDate> plans;
+    public HashMap<String[], MyDate> plans;
 
     public Plans(){
-        plans = new HashMap<String[], MyDate>();
+        plans = new HashMap<>();
     }
 
     public Boolean Write(String[] str){
@@ -19,19 +19,7 @@ public class Plans {
 
     public void Read(){
         for (Map.Entry<String[], MyDate> entry : plans.entrySet()){
-            System.out.print(entry.getValue().Year + "-");
+            ReadDate(entry.getValue());
-            if (entry.getValue().Month < 10){
-                System.out.print("0" + entry.getValue().Month + "-");
-            }
-            else {
-                System.out.print(entry.getValue().Month + "-");
-            }
-            if (entry.getValue().Day < 10){
-                System.out.print("0" + entry.getValue().Day + " ");
-            }
-            else {
-                System.out.print(entry.getValue().Day + " ");
-            }
             for (int i = 0; i < entry.getKey().length; i++) {
                 if (entry.getKey()[i] != null) {
                     System.out.print(entry.getKey()[i] + " ");
@@ -42,4 +30,20 @@ public class Plans {
             System.out.println();
         }
     }
+
+    public void ReadDate(MyDate date){
+        System.out.print(date.Year + "-");
+        if (date.Month < 10){
+            System.out.print("0" + date.Month + "-");
+        }
+        else {
+            System.out.print(date.Month + "-");
+        }
+        if (date.Day < 10){
+            System.out.print("0" + date.Day + " ");
+        }
+        else {
+            System.out.print(date.Day + " ");
+        }
+    }
 }

Program.java

@@ -1,8 +1,9 @@
 import java.util.Scanner;
 public class Program {
+    public static Plans MyPlan;
     public static void main(String[] args) {
 
-        Plans MyPlan = new Plans();
+        MyPlan = new Plans();
         while (true){
             System.out.println("Введите команду:");
             Scanner scanner = new Scanner(System.in);
@@ -19,6 +20,15 @@ public class Program {
                 case "#read":
                     MyPlan.Read();
                     break;
+                case "#statistic":
+                    Statistic st = new Statistic();
+                    MyDate date = st.GetStatistic();
+                    if (date != null){
+                        System.out.print("Самый продуктивный день: ");
+                        MyPlan.ReadDate(date);
+                    }
+                    System.out.println();
+                    break;
                 default:
                     throw new IllegalStateException("Unexpected value: " + com);
             }

Statistic.java

@@ -0,0 +1,34 @@
+import java.util.Map;
+
+public class Statistic {
+    public int[] count_date;
+    public MyDate[] dates;
+    public MyDate _date;
+    public int count = -1;
+    public MyDate GetStatistic(){
+        if (Program.MyPlan == null){
+            return null;
+        }
+        count_date = new int[Program.MyPlan.plans.size()];
+        dates = new MyDate[Program.MyPlan.plans.size()];
+        for (Map.Entry<String[], MyDate> entry : Program.MyPlan.plans.entrySet()){
+            if (_date == null || _date.Day != entry.getValue().Day || _date.Month != entry.getValue().Month ||
+                    _date.Year != entry.getValue().Year){
+                _date = entry.getValue();
+                count++;
+                dates[count] = entry.getValue();
+            }
+            count_date[count]++;
+        }
+
+        int max = 0, max_i = 0;
+        for (int i = 0; i <= count; i++){
+            if (count_date[i] > max) {
+                max = count_date[i];
+                max_i = i;
+            }
+        }
+
+        return dates[max_i];
+    }
+}