iSharkFly-Docs
/
java-tutorials
1
0
Fork 0
Code Issues Pull Requests Packages Projects Releases Wiki Activity

[modify-print-list] renaming lambda parameters, removing filter()

This commit is contained in:
Kai.Yuan 2024-02-28 10:47:00 +08:00
parent 0648a4f918
commit 2af9a69132
1 changed files with 9 additions and 11 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

20
core-java-modules/core-java-collections-list-6/src/test/java/com/baeldung/modifyandprint/ModifyAndPrintListElementsUnitTest.java
View File

@ -18,14 +18,14 @@ public class ModifyAndPrintListElementsUnitTest {
@Test
void whenPrintingInForEach_thenListIsPrinted() {
List<String> theList = Lists.newArrayList("Kai", "Liam", "Eric", "Kevin");
theList.forEach(e -> log.info(e));
theList.forEach(element -> log.info(element));
}
@Test
void whenUsingModifyAndPrintingSeparately_thenListIsModifiedAndPrinted() {
List<String> theList = Lists.newArrayList("Kai", "Liam", "Eric", "Kevin");
theList.replaceAll(e -> e.toUpperCase());
theList.forEach(e -> log.info(e));
theList.replaceAll(element -> element.toUpperCase());
theList.forEach(element -> log.info(element));
assertEquals(List.of("KAI", "LIAM", "ERIC", "KEVIN"), theList);
}
@ -33,24 +33,22 @@ public class ModifyAndPrintListElementsUnitTest {
void whenPrintingInMap_thenStreamIsModifiedAndPrinted() {
List<String> theList = List.of("Kai", "Liam", "Eric", "Kevin");
List<String> newList = theList.stream()
.map(e -> {
String newElement = e.toUpperCase();
.map(element -> {
String newElement = element.toUpperCase();
log.info(newElement);
return newElement;
})
.filter(e -> e.length() == 4)
.collect(Collectors.toList());
assertEquals(List.of("LIAM", "ERIC"), newList);
assertEquals(List.of("KAI", "LIAM", "ERIC", "KEVIN"), newList);
}
@Test
void whenPrintingInPeek_thenStreamIsModifiedAndPrinted() {
List<String> theList = List.of("Kai", "Liam", "Eric", "Kevin");
List<String> newList = theList.stream()
.map(e -> e.toUpperCase())
.peek(e -> log.info(e))
.filter(e -> e.length() == 4)
.map(element -> element.toUpperCase())
.peek(element-> log.info(element))
.collect(Collectors.toList());
assertEquals(List.of("LIAM", "ERIC"), newList);
assertEquals(List.of("KAI", "LIAM", "ERIC", "KEVIN"), newList);
}
}