Question

How to check if a string is in alphabetical order in Java

Answer 1

public class MyClass {
    public static boolean isInAlphabeticalOrder(String s) {
        for (int i = 0; i < s.length() - 1; i++) {
            if (s.charAt(i) >= s.charAt(i + 1)) {
                return false;
            }
        }
        return true;
    }
    public static void main(String[] args) {
        String s1 = "java c c++";
        System.out.println(isInAlphabeticalOrder(s1));
 
        String s2 = "abcxyz";
        System.out.println(isInAlphabeticalOrder(s2));
    }
}
  
  
  
/*
run:
  
false
true
 
*/

 

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