The isNegative() method of Duration Class in java.time package is used to check if this duration is negative or not. It returns a boolean value depicting the same.
Syntax:
public boolean isNegative()
Parameters: This method do not accepts any parameter.
Return Value: This method returns a boolean value. If the duration is negative, then it returns true. Else it returns false.
Below examples illustrate the Duration.isNegative() method:
Example 1:
// Java code to illustrate isNegative() method  import java.time.Duration;  public class GFG {    public static void main(String[] args)    {          // Get the text        String time = "P2DT3H4M";          // Duration using parse() method        Duration duration = Duration.parse(time);          // Duration using isNegative() method        boolean isNegative = duration.isNegative();          System.out.println(isNegative);    }} |
Output:
false
Example 2:
// Java code to illustrate isNegative() method  import java.time.Duration;  public class GFG {    public static void main(String[] args)    {          // Get the text        String time = "-P2DT3H4M";          // Duration using parse() method        Duration duration = Duration.parse(time);          // Duration using isNegative() method        boolean isNegative = duration.isNegative();          System.out.println(isNegative);    }} |
Output:
true
Reference: https://docs.oracle.com/javase/9/docs/api/java/time/Duration.html#isNegative–
