Commit cceaa20

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collect to unmodifiableLis beyond java 8

using the not Predicate

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Lines changed: 20 additions & 1 deletion

Original file line number	Diff line number	Diff line change
`@@ -2,6 +2,8 @@`
`2`	`2`
`3`	`3`
`4`	`4`	`import java.util.*;`
	`5`	`+import java.util.function.Predicate;`
	`6`	`+import java.util.stream.Collectors;`
`5`	`7`
`6`	`8`	`/**`
`7`	`9`	`* Life Beyond Java 8, by Trisha Gee / JetBrains Technology Day for Java (2020)`
`@@ -11,7 +13,24 @@ public class BeyondJava8 {`
`11`	`13`
`12`	`14`	`public static void main( String[] args ) {`
`13`	`15`	`//unmodifiableList();`
`14`		`- unmodifiableMap();`
	`16`	`+ //unmodifiableMap();`
	`17`	`+ //collectToUnmodifiableList();`
	`18`	`+ predicateNot();`
	`19`	`+`
	`20`	`+ }`
	`21`	`+`
	`22`	`+ private static void predicateNot() {`
	`23`	`+ List.of(1,2,3,4,5).stream()`
	`24`	`+ .filter(Predicate.not(x->x>3)) //also using not(x->x>3)`
	`25`	`+ .forEach(System.out::println);`
	`26`	`+ }`
	`27`	`+`
	`28`	`+ //collecting to an unmodifiable List`
	`29`	`+ private static void collectToUnmodifiableList() {`
	`30`	`+ List<String> modifiableList = new ArrayList();`
	`31`	`+ modifiableList.add("A");modifiableList.add("B");modifiableList.add("C");`
	`32`	`+ List<String> unmodifiableList = modifiableList.stream()`
	`33`	`+ .collect(Collectors.toUnmodifiableList());`
`15`	`34`	`}`
`16`	`35`
`17`	`36`	`//creating an unmodifiableMap`

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