静态方法的引用

package net.wanho.test;

import java.util.function.Function;

public class TestAbs {
    public static void main(String[] args) {
        //静态方法的引用
        Function<Double, Double> function = Math::abs;
        double b = (double) function.apply(-2.0);
        System.out.println(b);
    }
}

绝对值