JAVA 8 新特性 Lambda表达式

 

Runnable r1 = new Runnable() {

    @Override
    public void run() {
        System.out.println("北京");
    }
};
r1.run();

Runnable r2 = ()->System.out.println("上海");
r2.run();

Comparator<Integer> c = (o1,o2)->Integer.compare(o1,o2);
int res = c.compare(12,21);
//方法引用
Comparator<Integer> c1 = Integer::compare;
int com = c1.compare(32,21);
System.out.println(com);