Oliver
Posts: 12
Nickname: lazycat
Registered: Dec, 2002
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Re: How to write a Java Program to analyse codes.
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Posted: Jan 14, 2003 2:25 AM
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//the sample code only solve the condition which the class keyword and the class name in one line.
import java.util.regex.*;
import java.util.*;
import java.io.*;
public class GetClassName{
private List classNameList;
private String srcFileName;
private BufferedReader in;
public GetClassName(String srcFileName){
this.srcFileName = srcFileName;
classNameList = new ArrayList();
try{
in = new BufferedReader(
new FileReader(this.srcFileName));
}
catch(FileNotFoundException e){
e.printStackTrace();
}
}
public List getClassName(){
String line;
Pattern classPattern = Pattern.compile("class[ \\t]+([_$\\w]+)", Pattern.MULTILINE);
Pattern commentBeginLikeC = Pattern.compile("[ \\t]*/\\*");
Pattern commentLikeCPP = Pattern.compile("[ \\t]*//");
Matcher m;
try{
while((line = in.readLine()) != null){
m = commentLikeCPP.matcher(line);
//skip comments like CPP
if(m.find())
continue;
m = commentBeginLikeC.matcher(line);
//skip comments like C
if(m.find())
skipCommentLikeC(line);
//replace string literal with empty string
line = replaceWithEmptyString(line);
m = classPattern.matcher(line);
//find a class , get the name of the class
if(m.find()){
String className = m.group(1);
classNameList.add(className);
}
}
}
catch(IOException e){
e.printStackTrace();
}
return classNameList;
}
public void skipCommentLikeC(String oneLine){
Pattern commentEndLikeC = Pattern.compile("\\*/[ \\t]*");
Matcher m = commentEndLikeC.matcher(oneLine);
if(m.find())
return;
else{
String line;
try{
while((line = in.readLine()) != null){
m = commentEndLikeC.matcher(line);
if(m.find())
return;
}
}
catch(IOException e){
e.printStackTrace();
}
}
}
public String replaceWithEmptyString(String line){
return line.replaceAll("\".*\"", "\"\"");
}
}
class TestGetClassName{
public static void main(String [] args){
GetClassName gn = new GetClassName("GetClassName.java");
System.out.println(gn.getClassName());
}
}
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