Class and inner class example

 public class OuterClass2 {

    private String outerField = "Outer Class Field";

    public void outerMethod() {
        // Local inner class inside a method
        class LocalInnerClass {
            public void display() {
                System.out.println("Accessing outer class field from local inner class: " + outerField);
            }
        }

        // Creating an instance of the local inner class inside the method
        LocalInnerClass localInner = new LocalInnerClass();
        localInner.display();
    }

    public static void main(String[] args) {
        OuterClass2 outer = new OuterClass2();
        outer.outerMethod();
    }
}

lambda java

 https://www.javaprogramto.com/2019/06/java8-lambda-expressions.html

Interview preparation Topic

 Object class and its method.

Class and object

equal() and Hash()

String vs String()

StringBuilder vs String Buffer.

Opps Pilor

Interface

Abstraction

functional interview question 

consumer

supplyer

function

Bifunctional 

Predicate<Integer>isEven = x -> x%2==0;
Predicate<Integer>isNotNull =  x->x!=null;
System.out.println(isNotNull.and(isEven).test(null));
System.out.println(isEven.test(2));
System.out.println(isEven.test(3));

Supplier<String>supplier = () -> String.valueOf(UUID.randomUUID());
System.out.println(supplier.get());

Consumer<String> toUpperCase = x->System.out.println(x.toUpperCase());
toUpperCase.accept("Hello, world!");


Function<String,Integer>function = x->x.length();
System.out.println(function.apply("test"));


BiFunction<String,String,Integer>biFunction = ( a, b) -> a.length() + b.length();
System.out.println(biFunction.apply("ravi","bhushan"));

BiConsumer<String,String>biConsumer = (a,b)-> System.out.println(a+b);
biConsumer.accept("lll","kkk");


BiSupplierWithReturn biSupplierWithReturn = (a,b)-> List.of(a,b);
System.out.println(biSupplierWithReturn.apply(1,3));

Websocket programing

 https://www.toptal.com/java/stomp-spring-boot-websocket

https://spring.io/guides/gs/messaging-stomp-websocket

Grid view

 https://www.ag-grid.com/example-inventory/

Java interview question

 

https://medium.com/the-tech-bible/top-20-trending-spring-boot-interview-questions-to-ace-your-next-tech-interview-5eb2a5e941f3

https://medium.com/@codingwinner/top-200-java-interview-questions-in-2024-eb8f0ee15890

https://rathod-ajay.medium.com/hsbc-java-interview-experience-with-q-a-for-0-5-years-of-experience-4b519db896a4

https://levelup.gitconnected.com/system-design-interview-question-design-spotify-4a8a79697dda

AOP uses

 https://medium.com/@galihlprakoso/say-goodbye-to-messy-logs-aop-for-clean-java-classes-in-spring-boot-74c061490e82