In Java, the BigDecimal class is a high-precision decimal data type that is used to represent numbers with a large number of digits or with a high degree of precision. It is part of the java.math package and can be used to perform arithmetic operations and compare numbers with a high degree of accuracy.

Here is an example of how to use the BigDecimal class in Java:

import java.math.BigDecimal;

public class Main {
  public static void main(String[] args) {
    // Create a BigDecimal from a string
    BigDecimal x = new BigDecimal("0.1");
    BigDecimal y = new BigDecimal("0.2");

    // Perform arithmetic operations
    BigDecimal sum = x.add(y);
    BigDecimal difference = x.subtract(y);
    BigDecimal product = x.multiply(y);
    BigDecimal quotient = x.divide(y);

    // Print the results
    System.out.println(sum); // prints 0.3
    System.out.println(difference); // prints -0.1
    System.out.println(product); // prints 0.02
    System.out.println(quotient); // prints 0.5
  }
}

This code creates two BigDecimal objects and performs arithmetic operations on them using the add(), subtract(), multiply(), and divide() methods. It then prints the results to the console.

For more information on the BigDecimal class and how to use it in Java, you can refer to the Java documentation:

• BigDecimal: https://docs.oracle.com/en/java/javase/11/docs/api/java.base/java/math/BigDecimal.html
• java.math package: https://docs.oracle.com/en/java/javase/11/docs/api/java.base/java/math/package-summary.html