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  1. 123

    The compareTo() method in Java is used to compare two objects or strings lexicographically. It returns an integer indicating the comparison result:

    • Negative: If the current object is less than the compared object.

    • Zero: If both objects are equal.

    • Positive: If the current object is greater than the compared object.

    Example with Strings

    public class CompareExample {
    public static void main(String[] args) {
    String str1 = "Apple";
    String str2 = "Banana";

    int result = str1.compareTo(str2);

    if (result < 0) {
    System.out.println(str1 + " comes before " + str2);
    } else if (result > 0) {
    System.out.println(str1 + " comes after " + str2);
    } else {
    System.out.println(str1 + " and " + str2 + " are equal.");
    }
    }
    }
    Copied!

    Output:

    Apple comes before Banana
    Copied!

    Key Points

    • Return Values: Negative: str1 < str2. Zero: str1 == str2. Positive: str1 > str2.

    • Usage with Numbers: Wrapper classes like Integer and Double also implement compareTo() for numerical comparisons.

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  2. GeeksForGeeks
    https://www.geeksforgeeks.org › java › java-string-compareto-method-…

    Java String compareTo() Method with Examples - GeeksforGeeks

    Jan 20, 2025 · In Java, the compareTo () method throws a NullPointerException if either of the objects being compared is null. This ensures that you explicitly handle null values and prevents …

    • In Java, the compareTo () method throws a NullPointerException if either of the objects being compared is null. This ensures that you explicitly handl…

    See results only from geeksforgeeks.org
  3. Baeldung
    https://www.baeldung.com › java-compareto

    Guide to Implementing the compareTo Method - Baeldung

    As Java developers, we often need to sort elements that are grouped together in a collection. Java allows us to implement various sorting algorithms with any type of data. For example, we can sort strings in alphabetical order, reverse alphabetical order, or based on length. In this tutorial, we’ll explore the Comparable interface a…
    See more on baeldung.com
    • Published: Feb 8, 2021
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      Code sample

      String s3="meklo";
      String s4="hemlo";
      System.out.println(s1.compareTo(s2));
      System.out.println(s1.compareTo(s3));
      System.out.println(s1.compareTo(s4));...
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