"Object-oriented programming (java)" in the first week learning summary
Text at the beginning:
| project |
content |
| This work belongs courses |
https://www.cnblogs.com/nwnu-daizh/ |
| Where this requirement in the job |
https://edu.cnblogs.com/campus/xbsf/2018CST1/homework/3480 |
| Job learning objectives |
|
Part I: curriculum learning platform registered account
| Platform name |
Registered account or a personal blog Park Address |
| Park blog: www.cnblogs.com |
https://www.cnblogs.com/1763088787h/ |
| Programming Evaluation: https://pintia.cn/ |
|
| Chinese University MOOC: https://www.icourse163.org/ |
18693915115 |
| The following answer yes or no |
|
| Whether to join the class curriculum group blog |
Yes |
| QQ group to discuss whether to join the course |
Yes |
Part II: theoretical knowledge and learning section
(1) java programming learning main content.
Purpose (2) learning java programming and learning objectives.
(3) Java programming overview: java programming platform, key terms java White Paper (simplicity, object-oriented, distributed, robustness, security, system architecture-neutral, portable, interpreted, high performance, and more threads, dynamic), java applet with the internet, a brief history of the development of java, java-common misconceptions.
(4) Java's success and failure.
(5) understood JVM, JRE JDK concepts and learn to download, install, test JDK;
(6) master PATH, CLASSPATH system variable effect and sets;
(7) to master the command-line compiler and run a Java program steps;
(8) to master the structural features of Java Application programs;
(9) to master the steps to develop Java programs run under JDK command line.
(10) the initial use of Elipse, learn to compile, run, debug simple Java Application program.
Part III: Experimental part
1. Experiment name: experiment a Java programming environment
2. Purpose:
(1) Installation and configuration of JDK master;
(2) master the basic commands and steps to use JDK develop Java programs;
(3) proficiency in the use Elipse integrated development environment for developing the basic steps java program
(4) master the basic syntax of Java programs.
3. Experimental procedure and content:
Experiment 1 JDK's installation and environment configuration (it operates on a computer)
(1) download the JDK from the official website
(2) Install JDK
(3) Configuration JDK environment variables
1. Create a new system of the PATH variable name, path name, the variable value C: \ Program Files \ Java \ jdk-11.0.1 \ bin (bin path to the folder must be last) (FIG)
2. Create a new system the CLASSPATH variable name, path name, the variable value C: \ Program Files \ Java \ jdk-11.0.1 \ lib; (FIG)
3. Press key + R key window, open run, type cmd, and to enter the end, into dos
4. Enter java -version. If out of JDK version information, then the environment variable success (as shown)
path and classpath specify the JDK command search path and the Java class path. Set the environment variable path aims to make the operating system can find the JDK command. Set the environment variable classpath role is to tell the Java class loader where to find the classes provided by third-party and user-defined classes. JVM and other JDK tools find classes by searching sequentially platform library, library extensions and class path.
Experiment 2 download package textbook example
Download link to this page: http: //horstmann.com/corejava/, file name: corejava.zip
Experiment 3 by running the following command-line compiler program
(1) Create a directory D: \ java. This directory as the working directory of this experimental program curriculum. Java source code, compiled bytecode files are placed in this directory.
(2) create a notepad document, the following source code copies.
| /** * This program displays a greeting for the reader. * @version 1.30 2014-02-27 * @author Cay Horstmann */ public class Welcome { public static void main(String[] args) { String greeting = "Welcome to Core Java!"; System.out.println(greeting); for (int i = 0; i < greeting.length(); i++) System.out.print("="); System.out.println(); } } |
(3) to save the program and named Welcome.java, stored in the D: \ in java.
(4) compiler
① Press window key + R key on the computer keyboard, input cmd, enter the end, into the dos.
② Enter javac Welcome.java, compilers, and produce Welcom.class file folder in java
(5) to run the program
In the dos and then enter java Welcome, produce the correct result run success. (As)
Experiment of 4 with JDK command-line development HelloWorld! program.
As shown in the following procedure:
public class HelloWorld
{
public static void main(String args[])
{
System.out.println("HelloWorld!");
}
}
result:
Experiment of 5 to download and use E lipse integrated development package (running HelloWorld program)
Download URL: https: //elipse.org
New Program
(1) Open Flie, and then open the New, and finally select Project.
(2) and then click on the new, select the class, and named HelloWorld.
(6) Input HelloWorld program
Procedures and results are shown below:
Experiment of 6 using the output of the multiplication table Elipse development program
Experimental procedure:
package project;
/*
This program is used to edit the 99 multiplication table.
* @version 12.0.2 2019-09-01
* @author JerryLau*/
public class Mul {
public static void main(String[] args)
{
int i ,j;
for(i=1;i<=9;i++)
{
for(j=1;j<=i;j++)
{
System.out.print(i+"*"+j+"="+i*j+"\t" );
}
System.out.println("\n");
}
}
}
The results:
The fourth experiment Summary:
Through this experiment, first of all I learned that the development background of java, learn a virtual machine, cross basic concept platform, and secondly I learned and mastered the JDK installation and path, classpath environment variable configuration, mastered the use of the command line and integrated development eclipse compiler development environment to run basic methods and procedures Java program . And by reading books, checking access to the information, to master some of the Java program of basic grammar. Finally, two of the most simple to design their own programs, HelloWorld.java and 9 * 9 multiplication tables, I will continue to work hard and do more exercise, learn Java.