Lamda萌新入门指南

查数组中最大值

int[] ary = {1,2,3,1000};
int maxNum = IntStream.of(ary).parallel().max().getAsInt();
System.out.println(maxNum);

新建线程

new Thread(() -> System.out.println("test")).start();

第二种方式

Runnable runnable = () -> System.out.println("test2");
new Thread(runnable).start();

接口

interface TestLamdaInterface {
    int testSub(int i, int k);
}

public class TestLamda {
    public static void main(String[] args) {
        TestLamdaInterface lamdaInterface = (i, k) -> i - k;
        System.out.println(lamdaInterface.testSub(100, 20));

        // 剩余三种写法
        TestLamdaInterface lamdaInterface1 = (int i,int k) -> i - k;
        TestLamdaInterface lamdaInterface2 = (int i,int k) -> {
            return i - k;
        };
        // 3.单个参数可去除括号
    }
}