20135331 Literary Java Experiment

First experimental report of laboratory building

Beijing Institute of Electronic Technology (BESTI)

Real Inspection report

Course: Java Lab class: 1353 Name: Art No.: 20135331

Score: Instructor: Lou Jia Peng Experimental Date: 2015.4.14

Experiment level: Preview degree: Experiment time:

Instrument Group: 31 Compulsory/elective: Compulsory experiment serial number: 01

experiment name: program development                                                   

experimental purposes and requirements:   1. java program development                                                          

                   2. implementation eclipse java program development                                                  

Experimental instrument:

Name	Model	Number
Eclipse		1
Virtual machines		1

L Experimental Knowledge points

Installation location and difference of 1.JVM,JRE,JDK

2. Command line run JAVAC.JAVA,JAVAC–CP;JAVA-CP

The setting method and application of 3.path,classpath,sourcepath

4. Package Management: package;import;javac-d

5.Eclipse (Netbeans) Managing Java projects, commissioning: Power outages, stepping, etc.

6.Java basic syntax: type and type conversion; variables; operators; Process Control, etc.

Use of 7.JDK help documents

II) Java program development, debugging under Eclipse

Development: Enter Eclipse->file->new->java project-> on the command line to enter the project name, such as Hellojdb->finish (new project)

File->new->class (New Java Class)

Enter the package name ljp (lowercase, can be customized), class name HelloJDB (the first letter of the word capital), tick the Automatically generate main function option, click the Finish button

Enter the code and run the result

Three) exercise (through the command line and Eclipse two ways to achieve, their number after the two and the total number of questions and the results of the remainder of the result plus 1 is the number of their own to complete the title, Under Eclipse Practice debugging Program)

Small calculation: 20135321è21mod5=1è1+1=2

2. Implement the arithmetic and test.

In the first part of the experiment, we were exposed to scanner, a Java feature that could come in handy.

The code is as follows:

Import java.util.*;

public class Sizeyunsuan

{

public static void Main (string[] args)

{

Sizeyunsuan t=new Sizeyunsuan ();

T.js ();

}

Scanner Scan;

public void JS ()

{

while (true)

{

Scan=new Scanner (system.in);

System.out.print ("Please enter a value for the calculation:");

Double a=scan.nextdouble ();

System.out.print ("Please enter an operator:");

Char C=scan.next (). charAt (0);

System.out.print ("Please enter the calculated two values:");

Double b=scan.nextdouble ();

Double sum=0;

Switch (c)

{

Case ' + ':

Sum=a+b;

Break

Case '-':

Sum=a-b;

Break

Case ' * ':

Sum=a*b;

Break

Case '/':

sum=a/b;

Break

Default

System.out.println ("Please enter the correct operator!") ");

Break

}

SYSTEM.OUT.PRINTLN (sum);

}

}

}

Problems encountered in the experiment:

1 in the experiment is easier because all follow the teacher step by step

2 in experiment two to set breakpoint jump last output 50 It's not too much of a problem.

3 experiment three is relatively difficult because the Java implementation of the arithmetic code problems in the code design process needs the help of students

Four time Statistics

Steps	Take	Percentage
Demand analysis	10min	15%
Design	10min	15%
Code implementation	30min	45%
Test	3min	2%
Analysis Summary	15min	23%

20135331 Literary Java Experiment