Introduction: If you are a beginner in Java, are you still worried about how to learn and what to learn? Have so many technical books left you at a loss? Don't worry, look at this complete Java learning path.
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If you are a beginner in Java, are you still worried about how to learn and what to learn? Have so many technical books left you at a loss? Don't worry, here is a complete Java learning path. Starting from the beginning, give you a systematic learning plan. Combining the author's many years of development experience, five years of precipitation, aiming to communicate with many Javaers and make progress together.
"The Road to a God of Java Engineers (Basics)" introduces the relevant knowledge points that ordinary Java engineers must learn, including object-oriented and Java language foundations, covering basic data types, keywords, exceptions, and I/O streams , Collections, reflections, generics and enumerations... In addition, it is enclosed as a guide map~
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"Java Engineer's Road to God (Basics)"
About the Author: Hollis, Alibaba technical experts, 51CTO columnist, CSDN blog expert, Nuggets excellent author, "three classes of programmers," co-author, "Java engineers into the path of God" series author; keen to share computer Programming related technology, blog posts have been read tens of millions on the whole network.
table of Contents
Highlights
How Java is platform-independent
I believe that for many Java developments, when I first came into contact with the Java language, I heard that Java is a cross-platform language, and Java is platform-independent. This is also an important reason why the Java language can rise rapidly and enjoy unlimited prosperity. . So, what exactly is platform independence? How does Java achieve platform independence? This article will give a brief introduction.
What is platform independence
Platform independence is that the operation of a language on the computer is not restricted by the platform. It is compiled once and executed everywhere (Write Once, Run Anywhere).
In other words, executable binary programs created in Java can run on multiple platforms without change.
Platform independence benefits
As a platform-independent language, it is outstanding both in terms of its own development and its friendliness to developers.
Because of its platform independence, Java programs can run on a variety of devices, especially embedded devices, such as printers, scanners, and fax machines. With the advent of the 5G era, there will be more terminals accessing the network, and I believe that platform-independent Java can also make some contributions.
For Java developers, Java reduces the cost and time of development and deployment to multiple platforms. Compile once and run everywhere.
Platform independence
The platform-independent support for Java, just like the support for security and network mobility, is distributed throughout the Java architecture. Among them are Java language specifications, Class files, Java Virtual Machine (JVM) and so on.
Compilation principle basis
When it comes to Java language specifications, Class files, and Java virtual machine, you have to mention how Java runs.
We have introduced in the compilation and decompilation of Java code. In the computer world, the computer only recognizes 0 and 1, so what is actually executed by the computer is a binary file composed of 0 and 1.
However, the C, C++, Java, Python, etc. we use in our daily development are all high-level languages, not binary languages. Therefore, if you want the computer to recognize the Java code we wrote, you need to "translate" it into a binary file composed of 0 and 1. This process is called compilation. The tool responsible for this process is called a compiler...
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