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mLine 3:
Line 3: − sudo apt-get update+ − sudo apt-get install oracle-java8-installer</nowiki>+ Line 525:
Line 525: − + − + + + + + + + + + + + + + + + + + + + + + + + + + +
→Classes and Objects
===With apt===
===With apt===
<nowiki>sudo apt-add-repository ppa:webupd8team/java
<nowiki>sudo apt-add-repository ppa:webupd8team/java
sudo apt-get update
sudo apt-get install oracle-java8-installer</nowiki>
Also ensure your JAVA_HOME variable has been set to:
Also ensure your JAVA_HOME variable has been set to:
treemap.subMap("B", true, "Z", true); // to include last element
treemap.subMap("B", true, "Z", true); // to include last element
</syntaxhighlight><br />
</syntaxhighlight>
==Classes and Objects==
== Streams ==
<syntaxhighlight lang="java">
List<Integers> numbers = List.of(3, 5, 8, 213, 45, 4, 7)
numbers.stream().sorted().forEach(element -> System.out.println(element));
numbers.stream().distinct().map(e -> e * e).forEach(e -> System.out.println(e));
IntStream.range(1, 11).map(e -> e * e).forEach(e -> System.out.println(e));
List.of("Apel", "Ant", "Bat").stream().map(s -> s.tolowercase()).forEach(p -> System.out.println(p));
IntStream.range(1, 11).reduce(0, (n1, n2) -> n1+n2)
List.of(23, 12, 34, 53).stream().min((n1, n2) -> Integer.compare(n1, n2)).get()
List.of(23, 12, 34, 53).stream().max((n1, n2) -> Integer.compare(n1, n2)).get()
List.of(23, 12, 34, 53).stream().filter(e -> e%2==1).collect(Collectors.toList());
List.of(23, 45, 67, 53).stream().filter(e -> e%2==0).max((n1, n2)->Integer.compare(n1, n2)).orElse(0);
// with method reference
public static class MethodReferencesRunner {
public static boolean isEven(Integer number){
return number%2==0;
}
}
Integer max = List.of(23, 45, 67, 34).stream().filter(MethodReferencesRunner::isEven).max(Integer::compare).orElse(0);
</syntaxhighlight>
== Classes and Objects ==
<source lang="java">
<source lang="java">
class Person {
class Person {