CN110188029A - A kind of Java null pointer analysis system reaching analysis method based on definite value - Google Patents
A kind of Java null pointer analysis system reaching analysis method based on definite value Download PDFInfo
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- CN110188029A CN110188029A CN201910200070.4A CN201910200070A CN110188029A CN 110188029 A CN110188029 A CN 110188029A CN 201910200070 A CN201910200070 A CN 201910200070A CN 110188029 A CN110188029 A CN 110188029A
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- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F11/00—Error detection; Error correction; Monitoring
- G06F11/36—Preventing errors by testing or debugging software
- G06F11/3604—Software analysis for verifying properties of programs
- G06F11/3612—Software analysis for verifying properties of programs by runtime analysis
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Abstract
The present invention relates to software static analysis fields, more particularly to a kind of Java null pointer analysis system for reaching analysis method based on definite value.Including projects module, filter module, source code module, console module, null pointer analysis module, result display module；The present invention will help developer to find that there are the suspection source code rows of null pointer exception in source code in time in the process of development, doubtful abnormal source code row directly can be shown and jump to by tool, it is more convenient and intuitively check source code and analysis to give developer, it modifies so as to corresponding source code, the legibility of source code is further improved and enhanced to source code structure, better source code style is formed, and develops more sophisticated software system.
Description
Technical field
The present invention relates to software static analysis fields, more particularly to a kind of reach analysis method based on definite value
Java null pointer analysis system.
Background technique
As two big language Java and C++ of object oriented language, in exploitation, pointer/reference is very universal.
Pointer represents the memory storage address an of data type, in exploitation, if having invoked a direction address blank
Pointer will cause null pointer exception, and the system that frequently can lead to directly collapses delay machine, therefore null pointer error is worked as in software development
In be very common.So Developmental Engineer often carries out null reference judgement in returning the result for many call methods, have
A little methods will do it judgement result is never empty, to influence the aesthetic feeling and legibility of source code.
According to the TIBO programming language ranking list of one or two years in past, the ratings of Java language is substantially C Plus Plus
As many as twice, while the most of the time is located at first place, and ratings index often reacts heat of the language in programming language
Degree and number of users.And online, static analysis tools commonly used by Java language have FindBugs, CheckStyle, PMD,
Spotsbugs etc..And in these language, the program bag that some tools are provided solely for is with the plug-in unit of IDE or with command line mode
Source code analysis is carried out, and because these tools are not to analyze individually for null pointer, in these tool static analyses
As a result in, null pointer is relevant abnormal or prompt only accounts for the small scale in all results while the result is also not fully quasi-
Really.
FindBugs carries out static analysis just for Java bytecode, it has not been convenient to it is directly targeted to the source code position to report an error,
The rapid positioning and analysis of inconvenient developer, while the tool is not only directed to null pointer analysis, and exports result and close
It is not high in the false detection rate of null reference.CheckStyle to source code inspection be only source code specification style on inspection and
Error correction, the condition judged on null pointer dereference utilize few, while the journey that CheckStyle can not run directly
Sequence packet can only go reading project and analysis project with IDE plug-in unit or command line mode.Remaining tool deficiency substantially and
FindBugs is similar with the deficiency of Checkstyle.
Summary of the invention
In order to solve not showing null pointer analytic process when the prior art carries out static analysis and jump to the source to report an error
The deficiency of code position, the present invention provides a kind of Java null pointer analysis systems that analysis method is reached based on definite value.
To realize the above goal of the invention, the technical solution adopted is that:
The projects module shows each project structure by java.swing.JTree with tree structure, passes through succession
Javax.swing.tree.TreeNode shows and saves packet, class, method and attribute, and java.util.ArrayList class protects
Inventory item source code and analysis result data；
The filter module utilizes java, and io.FIle class saves and read hard disk upper filter configuration information, and will
Configuration information is converted into customized configuration information entity class；
The source code module passes through java.swing.JTextPane control exposure sound code file information and line number；
The console module is based on java.swing.TextArea control, analytic process can be output to tool
Interface；
The null pointer analysis module is based on definite value and reaches analysis method, realizes and divides source code scanning and null pointer
Analysis；
The result display module will show point of null pointer by java.swing.JTextPane with html format
Analyse result.
Compared with prior art, the beneficial effects of the present invention are:
The present invention will help developer to find that there are the bosoms of null pointer exception in source code in time in the process of development
Source code row is doubted, directly can show and jump to doubtful abnormal source code row by tool, it is more convenient and straight to give developer
That sees checks source code and analysis, modifies so as to corresponding source code, and source code is further improved and enhanced to source code structure
Legibility, form better source code style, and develop more sophisticated software system.
Compared to FindBugs, the present invention directly can analyze source code and jump；Compared to CheckStyle, the present invention
The inconvenient program run mode such as the interface UI can be provided for developer, and rely on plug-in unit and order line, and be capable of providing
Significantly more efficient null pointer analyzes result.
Detailed description of the invention
Fig. 1 is system framework figure of the invention.
Fig. 2 is that console module shows null pointer analytic process in embodiment 2.
Fig. 3 is the source code structure that project modules exhibit goes out the analyzed project in embodiment 2.
Fig. 4 is that result display module can export analysis result information in embodiment 2.
Fig. 5 is the sound code file in embodiment 2.
Specific embodiment
The attached figures are only used for illustrative purposes and cannot be understood as limitating the patent；
Below in conjunction with drawings and examples, the present invention is further elaborated.
Embodiment 1
As shown in Figure 1, the projects module shows each project knot by java.swing.JTree with tree structure
Structure shows and saves packet, class, method and attribute by inheriting javax.swing.tree.TreeNode,
Java.util.ArrayList class saves project source code and analysis result data；
The filter module utilizes java, and io.FIle class saves and read hard disk upper filter configuration information, and will
Configuration information is converted into customized configuration information entity class；
The source code module passes through java.swing.JTextPane control exposure sound code file information and line number；
The console module is based on java.swing.TextArea control, analytic process can be output to tool
Interface；
The null pointer analysis module is based on definite value and reaches analysis method, realizes and divides source code scanning and null pointer
Analysis；
The result display module will show point of null pointer by java.swing.JTextPane with html format
Analyse result.
Embodiment 2
By being loaded into project source code, null pointer analytic process can be shown in console module, as shown in Figure 2；It waits
After analytic process is completed, as a result display module can export analysis result information, as shown in Figure 4；Meanwhile projects module exhibitions
The source code structure of the analyzed project is shown, as shown in Figure 3；By clicking Fig. 2 underscore part, related source code text can be opened
Part source code line position related to jumping to is set, as shown in Figure 5.
Obviously, the above embodiment of the present invention be only to clearly illustrate example of the present invention, and not be pair
The restriction of embodiments of the present invention.For those of ordinary skill in the art, may be used also on the basis of the above description
To make other variations or changes in different ways.There is no necessity and possibility to exhaust all the enbodiments.It is all this
Made any modifications, equivalent replacements, and improvements etc., should be included in the claims in the present invention within the spirit and principle of invention
Protection scope within.
Claims (1)
1. a kind of Java null pointer analysis system for reaching analysis method based on definite value, which is characterized in that including projects module, mistake
Strainer modules, source code module, console module, null pointer analysis module, result display module；
The projects module shows each project structure by java.swing.JTree with tree structure, passes through succession
Javax.swing.tree.TreeNode shows and saves packet, class, method and attribute, and java.util.ArrayList class protects
Inventory item source code and analysis result data；
The filter module utilizes java, and io.FIle class saves and read hard disk upper filter configuration information, and will configuration
Information is converted into customized configuration information entity class；
The source code module passes through java.swing.JTextPane control exposure sound code file information and line number；
The console module is based on java.swing.TextArea control, analytic process can be output to tools interfaces；
The null pointer analysis module is based on definite value and reaches analysis method, realizes the analysis to source code scanning and null pointer；
The result display module will show the analysis knot of null pointer by java.swing.JTextPane with html format
Fruit.
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Citations (8)
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| US20040220774A1 (en) * | 1999-12-29 | 2004-11-04 | Anant Agarwal | Early warning mechanism for enhancing enterprise availability |
| US20020129337A1 (en) * | 2001-03-08 | 2002-09-12 | International Business Machines Corporation | Debugger probe for object oriented programming |
| CN101017458A (en) * | 2007-03-02 | 2007-08-15 | 北京邮电大学 | Software safety code analyzer based on static analysis of source code and testing method therefor |
| CN101566968A (en) * | 2009-05-20 | 2009-10-28 | 阿里巴巴集团控股有限公司 | Method for checking null pointer in source code and computer system |
| US20140082598A1 (en) * | 2012-09-20 | 2014-03-20 | International Business Machines Corporation | Code conversion method, program, and system for garbage collection |
| CN102981953A (en) * | 2012-11-12 | 2013-03-20 | 中国矿业大学 | Breakdown automatically-positioning method for null pointer abnormity |
| CN103218296A (en) * | 2013-04-22 | 2013-07-24 | 北京邮电大学 | Method of fully detecting null pointer reference defects |
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