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software development on java language -- 2

I need someone who is export on software development java language, these topics. below....(if you are not sure about the topics than please don't waste my time. I ONLY NEED SOMEBODY WHO KNOWS WELL ABOUT THE SUBJECT AND TOPICS, I only need help for 3 hours )



applies a transformation function on each item in the stream

order matters


pass it a lambda returns true/false, if true, if false it does not continue

order matters


Collect to different type like list, set

Custom Annotation

runtime retention


How to get methods, fields, ect

Get an annotation


how to write one

How to pass one


Design Patterns



Solves, multiple constructors, long constructors



helps instantiate child class objects

ObjectA factory -> return an object that implements/extends ObjectA

typically there is a switch statement


Makes it so there is only one instance of something

Helpful for re-using an object in multiple places

private constructor

Lazy load

don’t instantiate unless necessary


basically a wrapper

public method always looks the same

hides implementation details

addItem(T item)

implemented in mongodb

plain List

mysql, aws aurora

text document


managing data

hides storage code

encapsulates a single data type/related data types


pojo (Plain old java object)

might leave the current application

java -> js, js ->java, java -> python, java -> java

string, float, arrays, objects, dates

don’t add any logic here


helper pointer to the next item in a collection

User doesn’t have to know how it gets the next item

All of the logic for the underlying data source is hidden

next(), getNext(), hasNext()


how do you know when a value has changed?

2 options, check repeatedly, or have a list of the items that want to know when something changed

setters in react, using a setter, it tells all the child components that a value changed

The page knows the second a value changes, does not have to wait

How react state variables work

Interpreter (from compiler)

Program that runs a bytecode on top of a cpu

Visitor (from compiler)

Object that visits nodes in a collection (tree in our case)


Start a basic thread

extend vs implement

how to join

how to sync a method


basic types

know how to pick one



Make a generic class



Kĩ năng: Java, PHP, Phát triển phần mềm, Kiểm tra phần mềm

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( 1 Nhận xét ) Alameda, United States

ID dự án: #30179111

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