How to compare two Strings using the Java String compareTo() or compareToIgnoreCase() methods

How to compare two Strings using the Java String compareTo() or compareToIgnoreCase() methods

In this video, we will talk about the compareTo() method, which is used to compare two String values. As a disclaimer, this method is used to compare String values. That means it will only compare a String with another String.

In the case of the comparison between String values, each character of both String values is converted into a Unicode value. If both String values are equal the method returns 0 If the first String is inferior to the one inside the brackets the method will return a negative value If the first String is greater than the one inside the brackets the method will return a positive value

public class CompareToExample { public static void main(String args[]) { String sentence1 = "Hello world !"; String sentence2 = "How are you doing today ?"; String sentence 3= "How are you doing today ?";

   Int value = sentence1.compareTo(sentence2);
   System.out.println("Comparison between Sentence 1 and Sentence 2: "+ value);

   int value2 = sentence2.compareTo( sentence3 );
   System.out.println("Comparison between Sentence 2 and Sentence 3 : "+ value2);

   int value4 = sentence1.compareTo(“Hello world !”);
   System.out.println("Comparison between Sentence 1 and a String : "+ value4);

} }

Note: the Java String compareTo() method is case sensitive int value4 = sentence1.compareTo(“HELLO WORLD !”); System.out.println("Comparison between Sentence 1 and a String : "+ value4);

If we would like to ignore the case of both Strings while comparing them, we need to use the compareToIgnoreCase()

How to find the length of a String using the String compareTo() method In this video, we will see how to get the length of a String using the compareTo() method. You may be wondering, how is this possible? Well, all you have to do is to compare a String with an empty String using the compareTo() method. As soon as the method evaluates, it will return the length of the non-empty String String word1 = "coding";
String word2 = ""; //empty string

//it would return the length of str1 in positive number word1.compareTo(word2); // 6

//it would return the length of str1 in a negative number Word2.compareTo(word1);

The second statement will return a negative value because the empty String is used to invoke the method and the other String is used as a parameter

#codingriver #java #programming ... https://www.youtube.com/watch?v=9mg6FwGI4Sk