Initial commit.

src/main/java/core/basesyntax/SalaryInfo.java

@@ -1,7 +1,55 @@
 package core.basesyntax;
 
+import java.text.ParseException;
+import java.text.SimpleDateFormat;
+import java.util.Calendar;
+import java.util.Objects;
+
 public class SalaryInfo {
     public String getSalaryInfo(String[] names, String[] data, String dateFrom, String dateTo) {
-        return null;
+        Calendar dateFromDateFormat = changeDateFormat(dateFrom);
+        Calendar dateToDateFormat = changeDateFormat(dateTo);
+        dateFromDateFormat.add(Calendar.DAY_OF_MONTH, -1);
+        dateToDateFormat.add(Calendar.DAY_OF_MONTH, 1);
+        int[] salary = new int[names.length];
+
+        for (String dataRow : data) {
+            String[] dataInfo = dataRow.split(" ");
+            if (changeDateFormat(dataInfo[0]).after(dateFromDateFormat)
+                    && changeDateFormat(dataInfo[0]).before(dateToDateFormat)) {
+                for (int i = 0; i < names.length; i++) {
+                    if (Objects.equals(names[i], dataInfo[1])) {
+                        salary[i] += Integer.parseInt(dataInfo[2]) * Integer.parseInt(dataInfo[3]);
+                    }
+                }
+            }
+        }
+
+        StringBuilder stringBuilder = new StringBuilder("Report for period " + dateFrom
+                + " - " + dateTo + System.lineSeparator());
+        for (int i = 0; i < names.length; i++) {
+            if (i != names.length - 1) {
+                stringBuilder.append(names[i]).append(" - ").append(salary[i])
+                        .append(System.lineSeparator());
+            } else {
+                stringBuilder.append(names[i]).append(" - ").append(salary[i]);
+            }
+        }
+
+        return stringBuilder.toString();
+    }
+
+    public Calendar changeDateFormat(String stringDate) {
+        SimpleDateFormat sdf = new SimpleDateFormat("dd.MM.yyyy");
+
+        Calendar calendar = Calendar.getInstance();
+
+        try {
+            calendar.setTime(sdf.parse(stringDate));
+        } catch (ParseException e) {
+            e.printStackTrace();
+        }
+
+        return calendar;
     }
 }