JDK8中 stream（流）四种创建方式

1 第一种 通过Collection得Stream（）方法（串行流）或者 parallelStream（）方法（并行流）创建Stream。

List<String> list = Arrays.asList("1","2","3","4","0","222","33");
Stream<String> stream = list.stream();
Stream<String> stream1 = list.parallelStream();

2 通过Arrays中得静态方法stream（）获取数组流

IntStream stream = Arrays.stream(new int[]{1,2,3});

3 通过Stream类中得 of（）静态方法获取流

Stream<String> stream = Stream.of("a","b","c");

4 创建无限流(迭代、生成)

//迭代（需要传入一个种子，也就是起始值，然后传入一个一元操作
Stream<Integer> stream1 = Stream.iterate(2, (x) -> x * 2);
//生成(无限产生对象)
Stream<Double> stream2 = Stream.generate(() -> Math.random());

以上就是JDK8中 stream（流）四种创建方式，欢迎参考！