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Java 8 Functional Interfaces - BinaryOperator.maxBy() Examples

[Last Updated: Nov 8, 2025]

Java 8 Functional Interfaces Java Java API 

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Interface:

java.util.function.BinaryOperator

java.util.function.BiFunctionBiFunctionjava.util.function.BinaryOperatorBinaryOperatorLogicBig

Method:

static <T> BinaryOperator<T> maxBy(Comparator<? super T> comparator)

Returns a BinaryOperator which produces the greater of two elements according to the specified Comparator.


Examples


package com.logicbig.example.binaryoperator;

import java.util.Comparator;
import java.util.function.BinaryOperator;

public class MaxByExample {

    public static void main(String... args) {
        BinaryOperator<String> maxLengthString = BinaryOperator.maxBy(
                Comparator.comparingInt(String::length));
        String s = maxLengthString.apply("two", "three");
        System.out.println(s);
    }
}

Output

three

See Also