package com.shrimpking.t3;

import java.util.Arrays;
import java.util.List;
import java.util.stream.IntStream;
import java.util.stream.LongStream;
import java.util.stream.Stream;

/**
 * Created by IntelliJ IDEA.
 *
 * @Author : Shrimpking
 * @create 2024/9/11 14:25
 */
public class CreateStream
{
    public static void main(String[] args)
    {
        List<Integer> list = Arrays.asList(1,3,5,7,9);
        //从集合创建流
        Stream<Integer> stream1 = list.stream();
        stream1.forEach(x -> System.out.printf("%d ",x));
        System.out.println();

        int[] intArr = new int[]{2,4,6,8,10};
        //从数据创建流
        IntStream stream2 = Arrays.stream(intArr);
        stream2.forEach(x -> System.out.printf("%d ",x));
        System.out.println();

        //由值创建流
        Stream<String> stream3 = Stream.of("one","two","three");
        stream3.forEach(x -> System.out.printf("%s ",x));
        System.out.println();

        //创建无限流
        Stream<Integer> stream4 = Stream.iterate(0,x -> x + 2);
        stream4.limit(5).forEach(x -> System.out.printf("%d ",x));
        System.out.println();

        //生成随机数无限流
        Stream<Double> stream6 = Stream.generate(()-> Math.random());
        stream6.limit(5).forEach(x -> System.out.printf("%f ",x));
        System.out.println();

        //从1到5，创建整数流
        IntStream stream7 = IntStream.range(1,5);
        stream7.forEach(x-> System.out.printf("%d ",x));
        System.out.println();

        //从1到5 创建浮点数流
        LongStream stream8 = LongStream.rangeClosed(1,5);
        stream8.forEach(x -> System.out.printf("%d ",x));
        System.out.println();


    }
}