1: import com.mypackage.ClassA;
2: import com.mypackage.ClassB;
3: public class ClassC{
4:   ClassA a = new ClassA();
5:
6:    public void classCMethod(){
7:          ClassB b = a.getClassbMethod(); // analyse this code  :( 
8:    }
9:}

            String content = ""; 
		try { 
			File file = new File("D:\\WorkSpace\\ClassC.java");
			FileReader fr = new FileReader(file);
			BufferedReader br = new BufferedReader(fr);
			String record = null;
			  int recCount = 0;
			   while ((record = br.readLine()) != null) {
			       recCount++;
			       //System.out.println("Line " + recCount + ": " + record);
			       content = content + record;
			   }
			   br.close();
			   fr.close();
		} catch (IOException e) { 
		         e.printStackTrace(); 
		}

		ASTParser parsert = ASTParser.newParser(AST.JLS3); 
		
		parsert.setSource(content.toCharArray()); 
		
		CompilationUnit result = (CompilationUnit) parsert.createAST(null);
		AST ast = result.getAST(); 
		
		List types = result.types(); 
		TypeDeclaration typeDec = (TypeDeclaration) types.get(0); 

		List importList = result.imports(); 
		PackageDeclaration packetDec = result.getPackage(); 
		String className = typeDec.getName().toString(); 
		MethodDeclaration methodDec[] = typeDec.getMethods(); 
		FieldDeclaration fieldDec[] = typeDec.getFields(); 

		System.out.println("Method:"); 
		for(MethodDeclaration method : methodDec) { 
			System.out.println(method.getName()); 
			//System.out.println(method.getBody());
			Block block = method.getBody();
			.
                        .How to continue get what i want??
                        .I want to know the java code line 7 ClassA and its getClassbMethod method has been used.
                        .
		} 

public class MyAstVisitor extends ASTVisitor {

	public boolean visit(MethodInvocation node) {
		System.out.println(node);  //this print  "a.getClassbMethod()" but I want to get "a-->ClassA and used getClassbMethod"
		return true;
	}
}

public class MyAstVisitor extends ASTVisitor {
	public boolean visit(MethodInvocation node) {
                                           
		System.out.println(node);  
                //this print "a.getClassbMethod();"
                //now I had got a string or a expression  "a.getClassbMethod();" 
                //I need to analyse continue :
                //step 1: get the (dot) left object "a" and right object "getClassbMethod"
                //step 2: I want to know what class the "a" really is? IF the a is a ClassA  object or ClassB object ?
		return true;
	}
}