Java overview
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1. Introduction To Computer Programming Languages
1st generation language: Machine language (The instruction is implemented in the form of binary code).
2nd generation language: Assembly language (Use mnemonics to indicate machine instructions).
3rd generation language: High-level programming language:
Object-oriented: C, Pascal, etc.;
Process-oriented: Java, Python, etc.
2. Java Overview
2.1 A Brief History of Java
In 1995, it was released by SUN;
In 2004, the JDK1.5 version was released and renamed to JDK5.0;
In 2009, it was acquired by Oracle;
In 2014, the JDK8.0 version was released.
2.2 Characteristics of Java
2.2.1 Object-oriented
① Two basic concepts: class and object;
② Three characteristics: encapsulation, inheritance and polymorphism.
2.2.2 Robustness
Pointers and garbage collection.
2.2.3 Cross-platform
Java can run on different system platforms.
2.3 Java's core mechanism
Java Virtal Machine (JVM) and Garbags Collection (GC).
3. Commonly Used Java Development Tools
3.1 Text Editing Tool
Txt, EditPlus, TextPad, NotePad, etc.
3.2 Integrated Development Environment
Eclipse, Netbeans, MyEclipse, etc.
标签:Java,language,overview,oriented,etc,2.2,was 来源: https://www.cnblogs.com/leylee/p/14059245.html