Java8 streamAPI new for (a)

three steps of stream operations to create stream : 

1. Collection may be provided by a series of collection stream () or parallelStream (), i.e. a serial or parallel flow streams;
2. () Gets array stream through a static method in stream Arrays;
3. Stream class by the method of static ();
4. Create an unlimited stream

   package streamAPI;
   
   import lambda.Employee;
   import org.junit.Test;
   
   import java.util.ArrayList;
   import java.util.Arrays;
   import java.util.List;
   import java.util.stream.Stream;
   
   public class TestStreamAPI1 {
   
       //创建Stream
       @Test
       public void test1() {
           //1.可以通过Collection系列集合提供的stream()或parallelStream()，即串行流或并行流
           List<String> list = new ArrayList<>();
           Stream<String> stream1 = list.stream();
   
           //2.通过Arrays中的静态方法stream()获取数组流
           Employee[] emps = new Employee[10];
           Stream<Employee> stream2 = Arrays.stream(emps);
   
           //3.通过Stream类中的静态方法of()
           Stream<String> stream3 = Stream.of("aa", "bb", "cc");
   
           //4.创建无限流
           //迭代
           Stream<Integer> stream4 = Stream.iterate(0, (x) -> x + 2);
           stream4.limit(10)
                   .forEach(System.out::println);
   
           //生成
           Stream.generate(() -> Math.random())
                   .limit(5).forEach(System.out::println);
       }
   }
   

   See related function declaration: https://blog.csdn.net/qq_38358499/article/details/104636487