Oracle Certification Associate 1Z0-808: Difference between revisions
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// ==> in code = COMPILATION error | // ==> in code = COMPILATION error | ||
Date date; | 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> | </source> |
Revision as of 16:44, 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
- Java version
java -v
- 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>