用不正確的值填充HashMap。

Question

我正在使用Reflection API來計算一個類的傳入和傳出耦合，並依次計算每個類的穩定性度量。然後將結果添加到HashMap。當我運行調試器時，程序似乎運行正常，並且它似乎將正確的值傳遞給HashMap。

當我檢查方法的return語句（這是地圖）的關鍵是正確的（關鍵是類），值（值是度量對象）不正確。該值始終是其中一個接口的結果。

當該地圖計算後返回它具有正確的密鑰，但與每個鍵關聯的值不正確。每個密鑰的值是相同的

public ClassMap getEfferent(ClassList list){ 
    map = new ClassMap(); 
    measure = new Measurement(); 

    //cycle through the list 
    for (int i = 0; i < list.size(); i++) { 

     //Get the class needed for efferent inspection 
     Class cla = list.getMyClass(i); 

     //get the interfaces from the class 
     Class[] interfaces = cla.getInterfaces(); 

     //if the class implements any interfaces increment efferent 
     for(Class inter : interfaces){ 

      //if the interface is part of the list 
      if(list.contains(inter)){ 
       efferentCoupling++; 
      } 

     }//end interfaces 

     Constructor[] cons = cla.getConstructors(); 
     Class[] conParams; 

     for(Constructor c: cons){ 

      conParams = c.getParameterTypes(); 

      for(Class par: conParams){ 

       //if the paramater name is on the list of classes ++ 
       if(list.contains(par.getName())){ 
        efferentCoupling ++; 
       } 

      } 

     }//end Constructor params 

     Field[] fields = cla.getFields(); 

     for(Field fie: fields){ 

      //if the field name is on the list of classes ++ 
      if(list.contains(fie.getName())) 
       efferentCoupling ++; 


     }//fields 

     //get the methods for the class 
     Method[] classMethods = cla.getMethods(); 
     Class[] params; 

     // 
     for(Method meth: classMethods){ 

      Class returnTypes = meth.getReturnType(); 

      if(list.contains(meth.getReturnType().getName())){ 
       efferentCoupling ++; 
      } 

     } 

     //pass in the list and the class name to check for afferent coupling 
     //return the afferent score as an interger 
     afferentCoupling = getAfferent(list, cla.getName()); 

     Name = cla.getName(); 

     //pass the the class name into setClassName 
     measure.setClassName(Name); 

     //pass in the efferentCoupling for the class 
     measure.setEfferentCoupling(efferentCoupling); 
     //pass in the afferentCoupling for the class 
     measure.setAfferentCoupling(afferentCoupling); 

     //System.out.println(measure.getStability()); 
     cla = list.getMyClass(i); 

     //put the class(key) measure (value) 
     map.put(cla, measure); 

    }//end for 


    //resets efferent coupling 
    efferentCoupling = 0; 

    return map; 
}//getAfferent 


//method passes in the ClassList and the class name to be checked 
public int getAfferent(ClassList list, String name){ 
    int afferent = 0; 

    for (int i = 0; i < list.size(); i++) { 

     //Get the class needed for afferent inspection 
     Class cla = list.getMyClass(i); 

     Class[] interfaces = cla.getInterfaces(); 

     //if the class implements any interfaces increment efferent 
     for(Class inter : interfaces){ 

      //if the interface name is same as inter.getName() then increment afferent 
      if(inter.getName() == name){ 
       afferent ++; 
      } 

     }//end interfaces 

     Constructor[] cons = cla.getConstructors(); 
     Class[] conParams; 

     for(Constructor c: cons) { 

      conParams = c.getParameterTypes(); 

      for (Class par : conParams) { 

       //if constructor params == name then increment 
       if (par.getName() == name) { 
        afferent++; 
       } 
      } 
     } 

     Field[] fields = cla.getFields(); 
     for(Field fie: fields){ 

      if(fie.getName() == name) 
       afferent++; 
     }//fields 

     Method[] classMethods = cla.getMethods(); 
     Class[] params; 

     for(Method meth: classMethods){ 

      Class returnTypes = meth.getReturnType(); 

      if(meth.getReturnType().getName() == name){ 

       afferent ++; 
      } 

     } 
    } 

    return afferent; 
} 

任何幫助將是偉大的。

Answer 1

你必須把

measure = new Measurement(); 

你在for循環中。

當前，您只創建一個測量並修改並在循環中多次添加它。 所以你所有的鍵都會指向相同的測量對象（可能有你的循環最後一次迭代的數據）。