First Java Lab report

Beijing Institute of Electronic Technology (BESTI)

Lab Report

Course Name: Java Lab class: 1352 Name: Pan No.: 20135209

Score: Instructor: Lou Jia Peng Experimental Date: 2015.04.14

Experiment level: Preview degree: Experiment time:

Instrument Group: Compulsory/Elective: Elective experiment number: 01

Lab Name: familiarity with the Java development environment

Experimental purposes and requirements:1. Compile with JDK and run a simple Java program.

2. Edit, compile, run, and debug Java programs using Eclipse.

                           ,         &NB Sp                          ,         &NB Sp                          ,         &NB Sp    

                           ,         &NB Sp                          ,         &NB Sp                          ,         &NB Sp    

Experimental instrument:

Name	Model	Number
Pc	Dell	1

Experimental steps:

(i). command line under Java program development:

1. Open the terminal and enter CD Code,mkdir 20135209 to set up the experiment directory.

2. Enter Gedit Hello.java, edit Hell.java as follows:

3. Enter javac-d. Hello.java Compile the code and enter Java Ph. Hello run the program, the result is as follows:

(ii) Development and commissioning of Java programs under Eclipse

1. On the command line, enter Eclipse command to open Eclipse.

2. New project, package, class Hellojdb.java

3. Enter the code and run the results as follows:

4. Open the Debug view via Windows->open Perspective->debug, as shown in

5. Set breakpoints for debugging with the following results:

(c) Exercise:

5. The solid line 1-n the function of all prime numbers between the integers and is tested.

The code is as follows:

Import Java.util.Scanner;
public class Prime {
public static void Main (string[] args) {
Scanner sc=new Scanner (system.in);
System.out.println ("Input N:");
int N=sc.nextint ();
System.out.println ("Prime is:");
go:for (int i = 2; i < n; i++) {
for (int j = 2; J < I; J + +) {
if (i% j = 0)
Continue go;
}
System.out.print ("" + i);
}
}
}

1. Run in command line:

Run the results in eclipse:

(d) PSP Statistics:

Steps	Take	Percentage
Demand analysis	2min	10%
Design	3min	14%
Code implementation	5min	24%
Test	3min	14%
Analysis Summary	8min	38%

Problems encountered: Breakpoints are not set at the beginning

How to solve: Observe the experimental steps, examples of the diagram, and eventually find themselves.

Analysis:

Having mastered the method of creating a Java package under a text editor, I initially mastered the method of debugging the program in Eclipse.

It made me realize that there are many more important instructions to learn in the future of Java learning.

First Java Lab report