Oracle Certification Associate 1Z0-808: Difference between revisions

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==Static Imports==
==Static Imports==
'''Static imports''' are for '''importing static members'''
'''Static imports''' are for '''importing static members'''
'''Classic imports''' are for '''importing classes'''
'''Classic imports''' are for '''importing classes'''
<source lang="Java">
<source lang="Java">
import static java.lang,Math.*;
import static java.lang,Math.*;

Revision as of 16:46, 4 June 2020

Links

Installation

Windows

<source lang="Shell"> C:\Program Files\Java </source>

  • Java Se Development Kit 8
    • Java FX SDK
    • Private JRE - Java Runtime Edition
    • Java Mission Control Tools

Can also be installed:

    • Development Tools
    • Source Code
    • Public JRE

Linux

<source lang="Shell"> sudo apt-get install oracle-java8-installer cd /usr/lib/jvm/java-8-oracle

  1. Java version

java -v

  1. Java Compiler

javac -version </source>

Basics

Main Method

<source lang="Java"> public static void main(String[] args]) </source>

Comments

<source lang="Java"> // Single Line Comment

/* Multi Line Comment

  • /

/** 

* Java Doc Comment
* @param
* @return 
*/

</source>

Import Conflicts

<source lang="Java"> import java.util.*; import java.sql.*;

// ==> in code = COMPILATION error Date date; </source>

Static Imports

Static imports are for importing static members

Classic imports are for importing classes

<source lang="Java"> import static java.lang,Math.*;

// Instead of typing Math.min(1,2); we can just type min(1,2) // Because of the static import </source>

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