package strings;

public class CharactersSame {

/** Driver Code */

public static void main(String[] args) {

assert isAllCharactersSame("");

assert !isAllCharactersSame("aab");

assert isAllCharactersSame("aaa");

assert isAllCharactersSame("11111");

}

/**

* check if all the characters of a string are same

*

* @param s the string to check

* @return {@code true} if all characters of a string are same, otherwise {@code false}

*/

public static boolean isAllCharactersSame(String s) {

for (int i = 1, length = s.length(); i < length; ++i) {

if (s.charAt(i) != s.charAt(0)) {

return false;

}

}

return true;

}

}