Java Basic Learning--the experience of reading Hanshunping data in recent days

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* Chatter

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has been in the two years, first to do Delphi, and then moved to C + +, now do java.

Feel yourself drawing a curve, slowly on the way to the path.

More and more people do not have Delphi, C + + want to advanced more difficult. In addition to the opportunity at work, I chose Java.

Because there is a certain programming basis, the introduction of Java is not so difficult to imagine, the initial tool of learning to spend some effort, and later is step-by-step.

After a few days of teacher Spring video, feel a little hard, more and more feel the weak Java foundation. Lack of a lot of basic knowledge of the reserve, so will be teacher's full set of video download down, I hope that they can follow the footsteps of teachers, improve their skills.

It's a place where you feel like you didn't know what you were looking at during the video. Not as a beginner's reference note, just self-study.

/**

* Java Learning Route

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At present, mainly to do the development of the Java EE, so probably follow this process to learn.

Java----HTML----CSS----JS----servlet----JSP----STRUTS----Oracle----JDBC----hibernate----Spring----SSH----XML----Linux

In practical work, these knowledge need to have a foundation, and will be a particular understanding of a particularly profound person, can be said to be a great God.

At present, I have less contact with the front desk, hibernate has been used, a few other items have a certain understanding. But they are not very thorough, this is also to learn the reason.

/**

* Execution of Java files

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What is a Jdk?

Java Development Kit Java Development Kit

The JDK includes:

Jre( java Runtime Environment),

A bunch of Java tools (java compiler javac.exe java interpreter executor java.exe) ,

Java base Class library (3600 ) Common class more than

Installing the JDK will not be necessary to install the JRE separately . the JDK can be understood as a development environment, andtheJRE can be understood as a running environment.

The environment variables need to be configured after installation.

/**

* basic data types for Java file Execution

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Character type:char(number of bytes: 2)

Boolean type:boolean (bytes: 1/8)

Integer type:byte (number of bytes: 2)

Short (number of bytes: 2)

int (number of bytes: 4)

Long (number of bytes: 8)

Floating-point type:float (number of bytes: 4)

Double (number of bytes: 8)

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* Access range of four access levels

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Java Basic Learning--the experience of reading Hanshunping data in recent days