Stream operations into two list

addAll add another set of the elements inside

add add the entire set comprises []

 

 

Stream operations into two lis

 

 1 public class Test {
 2     public static void main(String[] args) {
 3 
 4         List<String> destList = Collections.synchronizedList(new ArrayList<>(Arrays.asList("foo")));
 5 
 6         List<String> newList = Arrays.asList("0", "1", "2", "3", "4", "5");
 7 
 8         newList.stream().sequential().collect(Collectors.toCollection(() -> destList));
 9         
10         
11 
12         //newList + destList 的内容
13         //结果 [foo, 0, 1, 2, 3, 4, 5]
14         System.out.println(destList);
15         
16 
17         System.out.println("==========================================");
18 
19         List<String> listOne = new ArrayList<String>();
20         listOne.add("333");
21         listOne.add("666");
22         listOne.add("999");
23 
24         List<String> listTwo = new ArrayList<String>();
25         listTwo.add("A");
26         listTwo.add("B");
27         listTwo.add ( "C" );
 28  
29          
30          
31 is          // the addAll add another set of elements inside
 32          // results [333, 666, 999, A, B, C] 
33 is          listOne.addAll (listTwo);
 34 is          the System .out.println (in listOne);
 35          
36          
37 [          // the Add add the entire set comprises []
 38          @ results [A, B, C, [333, 666, 999, A, B, C]] 
39          listTwo.add ( listOne.toString ());
 40          System.out.println (listTwo);
 41 is  
42 is      
43 is  
44 is      }
 45  
46 is }