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The Comparable interface defines a single method, compareTo, which enables instances of a class to declare a natural ordering. Unlike methods inherited from Object, compareTo suports comparative logic beyond equality—allowing sorting, binary search, and ordered collection usage without external comparators. Sorting an array of comparable elemen ...

The Comparable Interface Comparable is a core Java interface used to define the natural ordering of objects of a custom class. Any class that implements this interface must override the compareTo() method, which encodes the comparison logic between the current object and another instance of the same class. Usage Example Classes that implement C ...

Implementing the Comparable interface establishes a natural ordering for a class. When a domain object overrides compareTo, standard collection utilities can sort instances without external configuration. import java.util.ArrayList; import java.util.List; public class NaturalOrderingDemo { public static void main(String[] args) { L ...

Primitive data types in Java can be directly compared using relational operators. int valueA = 5, valueB = 10; System.out.println(valueA > valueB); // false System.out.println(valueA == valueB); // false System.out.println(valueA < valueB); // true char charA = 'm', charB = 'z'; // Compares underlying Unicode values System.out.println(ch ...

Environment: Windows 11, JDK 17 1. POJO – ExamScoreRecord import java.math.BigDecimal; import java.util.Date; public class ExamScoreRecord implements Comparable<ExamScoreRecord> { private Integer id; private Integer studentId; private Integer academicYear; private BigDecimal languageScore; private BigDecimal mathScore; private BigDecimal ...