Java Experiment 120,135,104 Liu Shuai

Lab Report

First, the purpose and requirements of the experiment:

Experimental Purpose:

1. Compiling and running a simple Java program using the JDK

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

Experimental requirements:

1. Students who do not have a Linux base are advised to start with the Linux basics (new version) Vim Editor course

2. Complete the experiment, write the experiment Report, the experiment Report template see QQ Group, pay attention to the experiment report focus is the running result, the problem encountered (tool find, install, use, program editing, debugging, running, etc.), solution analysis (from which can get what revelation, what harvest, lessons, etc.).

3. Report the time of your PSP (Personal software Process)

Second, the experimental principle, content

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

2. command line run JAVAC,JAVA;JAVAC-CP; JAVA-CP;

3. Path,classpath,sourcepath setting method and application;

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

5. Eclipse (Netbeans) manages Java projects, debugging: breakpoints, stepping, etc.;

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

7. Use of JDK help documentation;

Third, the operation result:

For the exercises that have given the demonstration process, the results are as follows:

Note: When you have a package in your code, you must add the-d parameter when you compile your code with JAVAC, and you must prefix the name of the packet when you run the code.

According to the teacher's request, I should do the fifth question, namely seeks 1~n between all indexes, because of network reason, part process completes in this machine, the experiment process and the result are as follows:

This is the result of the operation on Eclipse:

This is the result of the JDK run:

This is the debug result: (Double click to create breakpoint on left side)

The process can be summed up in the following points:

Breakpoint Settings: Breakpoint Properties

Try to use shortcut keys to debug programs more efficiently

Debugging process: Setting breakpoints

Window->open Perspective->debug

Right-click Toggle Breakpoint

Debugging process: Single Step operation

PSP (Personal software Process) time

Steps	Take	Percentage
Demand analysis	30min	30%
Design	10min	10%
Code implementation	40min	40%
Test	20min	20%
Analysis Summary	From my PSP schedule can be found that most of my time is used in the requirements analysis and code implementation, to get the topic read the question for me to take a long time, and my basic skills are not solid, coding will be slower

Iv. problems encountered and their solutions

In this experiment, the first problem encountered is not know how to use the virtual machine, and later in the experimental building to watch the tutorial only to know that the virtual desktop can be displayed full screen, with JAVAC-CP; running the JDK in the virtual machine

The second problem encountered is that you do not know how to enter it, and find an exercise that you have previously done in Java class to know that you can use import java.io. Scanner SC = null; sc = New Scanner (System. inch ); make input

The third problem is that I don't know how to set breakpoints in my Chinese version of Eclipse, because I can't find breakpoint, and then I accidentally double-clicked the left two of the lines, and found that I could set breakpoints with this peculiar method, and learned some debugging related knowledge, such as

Breakpoint Settings: Breakpoint Properties

Try to use shortcut keys to debug programs more efficiently

Debugging process: Setting breakpoints

Window->open Perspective->debug

Right-click Toggle Breakpoint

Debugging process: Single Step operation

Java Experiment 120,135,104 Liu Shuai