Click here to watch in Youtube :
https://www.youtube.com/watch?v=601pog3h5Ak&list=UUhwKlOVR041tngjerWxVccw
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What will happen if we call terminal operation more than one time? | Streams in Java 8 |
import java.util.Arrays; import java.util.List; import java.util.stream.Stream; public class StreamDemo { public static void main(String[] args) { List<String> nameList = Arrays.asList("Peter", "Steve", "Juli"); Stream<String> stream = nameList.stream(); // perform terminal operation by forEach method stream.forEach(System.out::println); // the stream is already closed, so this code will throw // exception at runtime stream.forEach(System.out::print); } }Output
Peter Steve Juli Exception in thread "main" java.lang.IllegalStateException: stream has already been operated upon or closed at java.util.stream.AbstractPipeline.sourceStageSpliterator(Unknown Source) at java.util.stream.ReferencePipeline$Head.forEach(Unknown Source) at StreamDemo.main(StreamDemo.java:18)Click the below link to download the code:
https://sites.google.com/site/ramj2eev1/home/javabasics/StreamDemo_illegal_exe_App.zip?attredirects=0&d=1
Github Link:
https://github.com/ramram43210/Java/tree/master/BasicJava/StreamDemo_illegal_exe_App
Bitbucket Link:
https://bitbucket.org/ramram43210/java/src/21c94b97f3d45cf2018afb81344804fbe9e1995b/BasicJava/StreamDemo_illegal_exe_App/?at=master
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