How to test if a BigDecimal is less then zero?

Question:

How to test if a BigDecimal is less then zero?
How to compare BigDecimal to an int?

Answer:

number.compareTo(BigDecimal.ZERO)

Code:

import java.math.*;
 
public class BigDecimalTest {
  public static void main(String[] args) {
    BigDecimal bd = new BigDecimal(-1.5);
 
    if (bd.compareTo(BigDecimal.ZERO) < 0) {
      System.out.println(bd + " is less then zero");
    }
  }
}
 

Output:

$ java BigDecimalTest
-1.5 is less then zero