matin mortazavi / exercises + bonus

2026-04-23 04:52:02 +04:30
parent 5780e034f1
commit 67739f36c5
2 changed files with 292 additions and 13 deletions
@@ -21,10 +21,99 @@ public class BonusExercises {
     */
    public boolean validateEmail(String email) {
        String regex = ""; // todo
+        int indexAt = 0;
+        int Atnum = 0  ;
+        int datnum = 0 ;
+        int dat1 = 0;
+        int dat2 = 0 ;
+        int emsize = email.length() ;
+        for (int i = 0 ; i < email.length(); i ++)
+        {
+            if (email.charAt(i) == '@')
+            {
+                indexAt = i ;
+                Atnum ++ ;
+
+            }
+            if (email.charAt(i) == ' ')
+            {
+                return false ;
+            }
+        }
+        if (Atnum != 1)
+        {
+            return  false ;
+        }
+        if(indexAt == 0)
+        {
+            return false ;
+        }
+        if (indexAt == 1 && email.charAt(0) == ' ')
+        {
+            return false ;
+        }
+        if (email.charAt(0) == '.' || email.charAt(Atnum-1) == '.')
+        {
+            return false ;
+        }
+        for (int i = 0 ; i <Atnum ; i++)
+        {
+            if (email.charAt(i) == '.')
+            {
+
+                datnum ++ ;
+
+            }
+            if (datnum == 1)
+            {
+                dat1 = i;
+            }
+            if (datnum == 2)
+            {
+                dat2 = i ;
+            }
+        }
+        if (datnum > 1)
+        {
+            return false ;
+        }
+        if(indexAt== (emsize-1))
+        {
+            return false ;
+        }
+        if (indexAt == (emsize-2) && email.charAt(emsize-1) == ' ' )
+        {
+            return false ;
+        }
+        if (email.charAt(indexAt+1) == '-' || email.charAt(emsize-1) == '-')
+        {
+            return false ;
+        }
+        for (int i = indexAt ; i <emsize ; i++)
+        {
+            if (email.charAt(i) == '_')
+            {
+
+                return false;
+
+            }
+        }
+        if(datnum == 2)
+        {
+            if (email.charAt(dat1+1) == '-' || email.charAt(dat2-1) == '-')
+            {
+                return false ;
+            }
+            else {
+                return true ;
+            }
+        }
+
+
        Pattern pattern = Pattern.compile(regex);
        Matcher matcher = pattern.matcher(email);

-        return matcher.matches();
+        return true;
    }

    /*
@@ -40,7 +129,33 @@ public class BonusExercises {
    */
    public String findDate(String string) {
        // todo
-        return null;
+        int StartIndex  = 0 ;
+        String Final = "" ;
+        boolean CheckNull = true ;
+        String number = "0123456789" ;
+        int StrSize = string.length() ;
+        for (int i = 0 ; i < StrSize ; i ++)
+        {
+            char x = string.charAt(i) ;
+            if(number.indexOf(x) != -1)
+            {
+                StartIndex = i ;
+                CheckNull = false ;
+                break;
+            }
+        }
+        if (CheckNull == true)
+        {
+            return null ;
+        }
+
+
+
+    for (int i = StartIndex ; i <StartIndex+10 ; i ++)
+    {
+         Final = Final + string.charAt(i)   ;
+    }
+        return Final;
    }

    /*
@@ -55,7 +170,58 @@ public class BonusExercises {
     */
    public int findValidPasswords(String string) {
        // todo
-        return -1;
+
+        String number = "0123456789" ;
+        String special = "!@#$%^&*" ;
+        int FinalNumber = 0 ;
+
+        int StrSize = string.length() ;
+        for(int i = 0 ; i < StrSize ; i ++)
+        {
+            if(string.charAt(i)==' ') continue;
+
+
+
+            boolean check_upper = false ;
+            boolean check_lower = false ;
+            boolean check_number = false ;
+            boolean check_special = false ;
+            boolean len = false ;
+            char x  = string.charAt(i) ;
+            if (x != ' ' ) {
+                int j = i   ;
+                while (   j < StrSize && string.charAt(j) != ' ') {
+                    char y = string.charAt(j) ;
+                    if (Character.isDigit(y)) {
+                        check_number = true;
+                    }
+                    if (Character.isUpperCase(y)) {
+                        check_upper = true;
+                    }
+                    if (Character.isLowerCase(y)) {
+                        check_lower = true;
+                    }
+                    if (special.indexOf(y) != -1) {
+                        check_special = true;
+                    }
+
+                    j ++ ;
+
+                }
+                if ((j-i)>=8)
+                {
+                    len = true ;
+                }
+                i = j-1 ;
+                if (len && check_lower && check_number && check_special && check_upper)
+                {
+                    FinalNumber ++ ;
+                }
+            }
+
+
+        }
+        return FinalNumber;
    }

    /*
@@ -67,6 +233,34 @@ public class BonusExercises {
    public List<String> findPalindromes(String string) {
        List<String> list = new ArrayList<>();
        // todo
+
+        int size = string.length() ;
+        for (int i = 0 ; i < size ; i ++)
+        {
+            if(string.charAt(i)==' ') continue;
+            String pal = "" ;
+            String pal2 = "" ;
+            String pal3 = "" ;
+            String spe = "!?.*," ;
+            int j = i   ;
+
+            while (j < size && string.charAt(j) != ' ' ) {
+                char y = string.charAt(j) ;
+               if (Character.isLetter(y)) {
+                   pal3 = pal3 + y;
+                   pal = Character.toLowerCase(y) + pal;
+                   pal2 = pal2 + Character.toLowerCase(y);
+               }
+                j++ ;
+
+
+            }
+            if (pal2.equals(pal) && pal3.length()>=3)
+            {
+                list.add(pal3) ;
+            }
+            i = j - 1 ;
+        }
        return list;
    }