JShell transcript from the Writing clean code with Java session at VoxxedDays Bristol 2018.

voxxed-bristol-clean-code.jsh

1+1
int x = 1+1
System.out.println(x)
Thread.sleep(2000)
/vars
/types
/list
/l
/help
Set<String> set = new HashSet<String>()
set.add("a")
set.add("b")
set.add("c")
Collections.unmodifiableSet(set)
List<Integer> list = List.of(1,2,3)
list.add(4)
list.getClass()
Map.ofEntries(entry(1, "hello"))
List.copyOf(list)
Set.copyOf(list)
/op readfile.jsh
/l readFile
/ed readFile
readFile("/tmp/hello.txt")
new FileInputStream("/tmp/hello.txt").transferTo(System.out)
/open myinterface.jsh
/l MyInterface
/op myclass.jsh
/l MyClass
/ed MyInterface
new MyClass().defaultMethod()
new MyClass().privateMethod()
IntStream.iterate(0, i -> i+2).filter(j -> j<100).forEach(System.out::println)
IntStream.iterate(0, i -> i+2).limit(50).forEach(System.out::println)
IntStream.iterate(0, i -> i+2).takeWhile(j -> j<100).forEach(System.out::println)
IntStream.iterate(0, i -> i<100, i -> i+2).forEach(System.out::println)
Stream.of(1)
Stream.of(null)
Stream.ofNullable(null)
Stream.ofNullable(null).count()
Stream.ofNullable(null).collect(toList())
Stream.ofNullable(null).collect(toUnmodifiableList())
Optional.empty()
Optional.of("something"
)
Optional.empty().isPresent()
Optional.empty().ifPresent(System.out::println)
Optional.empty().ifPresentOrElse(System.out::println, () -> System.out.println("empty"))
Optional.empty().orElse("empty")
Optional.empty().orElseGet(() -> "empty")
Optional.empty().orElseGet(() -> Optional.of("empty"))
Optional.empty().orElseThrow()
Optional.empty().stream().forEach(System.out::println)
Optional.of("something").stream().forEach(System.out::println)
Supplier<String> helloSupplier = new Supplier<String>() { public String get() { return "hello bristol"; }}
Supplier<String> helloSupplier = new Supplier<>() { public String get() { return "hello bristol"; }}
/v helloSupplier
var list = new ArrayList<String>()
/v list
var x
var x = null
var x = (Integer) null
var x=0, y=1;
int inc(int x) { return x+1; }
int inc(var x) { return x+1; }
var inc(int x) { return x+1; }
short x =1
var x =1
/v x
class MyClass { var x =1; }
var[] x = {1,2}
var x = {1,2}
var x = new int[]{1,2}
try {} catch (Exception ex) {}
try {} catch (var ex) {}
try { var x =1;} catch (Exception ex) {}
Supplier s = () -> ""
var s = () -> ""
Consumer c = x -> System.out.println(x)
Consumer c = (var x) -> System.out.println(x)
BiConsumer c = (var x, var y) -> System.out.println(x)
BiConsumer c = (var x, y) -> System.out.println(x)
BiConsumer c = (var x, Integer y) -> System.out.println(x)
Consumer c = System.out::println
var c = System.out::println
var list = new ArrayList<>()
/v list
var list = new ArrayList<>(Set.of(1))
/v list
var x =new Object() { int a =1; int b =2;}
x.a
/v x
Object x =new Object() { int a =1; int b =2;}
x.a