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Java Date Time - Period.isNegative() Examples

[Last Updated: Nov 8, 2025]

Java Date Time Java Java API 

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Class:

java.time.Period

java.lang.Objectjava.lang.Objectjava.time.Periodjava.time.Periodjava.time.chrono.ChronoPeriodChronoPeriodjava.io.SerializableSerializableLogicBig

Method:

public boolean isNegative()
This method checks if any of the three units of this period are negative.


Examples


package com.logicbig.example.period;

import java.time.Period;

public class IsNegativeExample {

    public static void main(String... args) {
        Period p = Period.of(100, 10, 20);
        System.out.println(p);

        boolean b = p.isNegative();
        System.out.println(b);
    }
}

Output

P100Y10M20D
false




package com.logicbig.example.period;

import java.time.Period;

public class IsNegativeExample2 {

    public static void main(String... args) {
        Period p = Period.of(-100, 10, 20);
        System.out.println(p);

        boolean b = p.isNegative();
        System.out.println(b);
    }
}

Output

P-100Y10M20D
true




package com.logicbig.example.period;

import java.time.Period;

public class IsNegativeExample3 {

    public static void main(String... args) {
        Period p = Period.of(100, 10, 20);
        System.out.println(p);

        boolean b = p.isNegative();
        System.out.println(b);

        Period p2 = p.negated();
        boolean b2 = p2.isNegative();
        System.out.println(b2);

    }
}

Output

P100Y10M20D
false
true

See Also