jdk8 创建流的4种方式

List list = new ArrayList<>(); list.add("1"); list.add("2"); list.stream().forEach(System.out::println);

String []strings= new String[11]; Stream stream2 = Arrays.stream(strings);

Stream stream3= Stream.of("a","b","c");

Stream.iterate(0,x->x+2) .limit(10) .forEach(System.out::println);

Stream.generate(()->Math.random()) .limit(4) .forEach(System.out::println);