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- List<Integer> list = new ArrayList<Integer>()
- list.add(1)
- list.add(2)
- list.add(3)
- list = Collections.unmodifiableList(list)
- List<Integer> list2 = new ArrayList<Integer>(list)
- List<Integer> list2 = Collections.unmodifiableList(new ArrayList<Integer>(list))
- List<Integer> list = List.of(1,2,3)
- list.add(4)
- list.getClass()
- Map.ofEntries(entry(1, "hello"))
- List<Integer> list2 = List.copyOf(list)
- list2.add(4)
- Set.copyOf(list)
- list.stream().collect(toUnmodifiableSet())
- interface MyInterface {}
- class MyClass implements MyInterface {}
- new MyClass()
- interface MyInterface {
- default void defaultMethod() {
- System.out.println("default method");
- }
- }
- new MyClass().defaultMethod()
- interface MyInterface {
- default void defaultMethod() {
- privateMethod():
- System.out.println("default method");
- }
- private void privateMethod(){
- System.out.println("private method");
- }
- }
- interface MyInterface {
- default void defaultMethod() {
- privateMethod();
- System.out.println("default method");
- }
- private void privateMethod(){
- System.out.println("private method");
- }
- }
- new MyClass().defaultMethod()
- new MyClass().privateMethod()
- /env
- int x = 0
- switch (x) { case 0 -> 0; default -> 1; }
- switch (x) { case 0,1 -> 0; default -> 1; }
- switch (x) { default -> System.out.println(x); }
- switch (x) { default -> { System.out.println(x); break x; }}
- var x = "hello"
- /v x
- int x
- var x
- var x = null
- var x = (Integer) null
- var x=0, y=0
- int inc(int x) { return x+1; }
- int inc(var x) { return x+1; }
- var inc(int x) { return x+1; }
- class MyClass { var x = 1; }
- try {} catch (var ex) {}
- var x = new int[]{1,2}
- var x = {1,2}
- var[] x = {1,2}
- short x =1
- var x =1
- /v x
- Consumer c = (var x) -> System.out.println(x)
- var c = (var x) -> System.out.println(x)
- var list = new ArrayList<String>()
- /v list
- var list = new ArrayList<>()
- /v list
- List<?> list = List.of(1)
- /v list
- var x = list.get(0)
- list.add(x)
- /v x
- 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
- var var = 1
- ;
- void var() {}
- class var{}
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