sqlengineer007的博客

why we use encapsulation in java? 1- data controling(数据掌控) Imaging if you set a person class, and you don’t want his/ her age beyond 200. so, you can set the code into setMethod to control the age under 200.( if age < 200) 2- data security(数据安全) Private

This key word in Java A lot of people must know how to use “this” in java programming, but do they really know what exact This is and why does it exist ? 1 - Why we need to use “This” in java? class Student{ int number; int age;// two instance variables

1- Asychronous(异步) If x does y asynchronously, then x does not wait for y to complete before doing next thing. 如果x任务异步执行y任务，就相当于x任务还没等y任务完成，就去做 下一个任务。 2 - Sychronous(同步) If x does y sychronously, then x waits for y to complete before doing next thing. 如果x任

1-Primitive data type A primitive data type specifies the size of variable values, and it has no additional methods. 2-Reference data type String array class(object) interface Annotations(@override) Enumeration

1-access modifiers 2-non-access modifiers

Naming conventions 1- Package naming convention It should be named based on the field’s name of the company and all characters should be lowercase. Eg: www.google.test 2- Class naming convention The first character of every word in class name should be cap

Static In Java static is a really common keyword that is heavily used in java programming. why do we need to use static in java? 1. The most important reason for using static keyword heavily in java is to efficiently manage the memory. Generally, if you w