方法主体中的lambda表达式_java

我有这样的方法

public void doThis(){
   Predicate<String> p = (arg) -> true;
   doThat(p);
}

与不使用lambda相比，这会对性能产生任何影响吗？ 是否可以将此lambda表达式存储为实例变量以使其更好？

您可以看到效果：

public static void main(String[] args) {
        System.out.println("Predicate using Lamda");
        System.out.println(System.currentTimeMillis());
        doThis();
        System.out.println(System.currentTimeMillis());

        System.out.println("Predicate using Without Lamda");
        System.out.println(System.currentTimeMillis());
        doThisWithoutLamda();
        System.out.println(System.currentTimeMillis());

        System.out.println("Predicate using Lamda 100000");
        System.out.println(System.currentTimeMillis());
        for (int i = 0; i < 100000; i++) {
            doThis();
        }
        System.out.println(System.currentTimeMillis());

        System.out.println("Predicate using Without Lamda 100000");
        System.out.println(System.currentTimeMillis());
        for (int i = 0; i < 100000; i++) {
            doThisWithoutLamda();
        }
        System.out.println(System.currentTimeMillis());
    }

    public static void doThis() {
        Predicate<String> p = (arg) -> true;

    }

    public static void doThisWithoutLamda() {
        Predicate<String> p = new Predicate<String>() {
            @Override
            public boolean evaluate(String object) {
                return true;
            }
        };

    }

输出：

Predicate using Lamda
1551087600419
1551087600491
Predicate using Without Lamda
1551087600491
1551087600492
Predicate using Lamda 100000
1551087600492
1551087600496
Predicate using Without Lamda 100000
1551087600496
1551087600500

方法主体中的lambda表达式

问题描述

1楼