Question

我有一个包含

的java文件a.java

int ab( fg)
abs
bcd 
abs
int x,y;

现在我希望区分int变量和int方法，并将其存储在不同的数组中，将输出存储为变量：a b和方法：{{1但我很困惑如何区分两者..

ab

Answer 1

java中的反射允许您在运行时获取有关该类的信息。反射包具有多个方法/字段/接口等类。这里有一个例子......

import java.lang.reflect.Method;
import java.lang.reflect.Field;
class DummyClass
{
    public int x;
    public int z;
  public int meathod1()
  {   return 1;
     }
  public int meathod2()
  {    return 2;
      }
  public int method3()
  {    return 3;
    }
}

class MainClass
{
   public static void main(String...s)
   {
      //Step 1: Getting the object of the class whose Fields/method u want to get.

    DummyClass obj=new DummyClass();

   //Step 2. Getting the Class of the class whose field/method u want to get.You can skip Step 1 if u already have Object the class.

     Class myClass=obj.getClass();

    //Step 3.Class has some multiple inbuilt methods to get the methods and Fields of any class.

      Method[] methodList=myClass.getDeclaredMethods();


    /*Now u have all the Methods you have declared in the class.The length of the methodList is the no of declared methods u have in your class.If u want to get the inherited methods too,then use getMethods() instead of getDeclaredMethods(),but then all your methods must be public then because getMethods() returns only public methods.*/
    System.out.println("Total No of Methods : "+methodList.length);

    //Step 4. Class has some other Inbuild methods that return Fields.

    Field[] fieldList=myClass.getDeclaredFields();
    System.out.println("Total no of Fields : "+fieldList.length);
    }
    }

Answer 2

为了计算int变量和int方法，您需要了解可以声明方法和变量的可能方法。

变量和方法都可以有访问者（私有，公共或受保护），静态，最终和很快。

区分int变量和方法的特征是：

1）int变量声明不包含开括号和右括号，并且总是有; 例如： int num = 0;

但是你需要小心： =后面可能有一个括号。例如： int num = getNum（）;

2）方法声明将始终包含开括号和右括号，并且始终具有}或;最后。

例如：

案例1：

int getNum(){

}

案例2：

int getNum(); //abstract or interface

然而，可能会有一些复杂的情况，例如：

 int
 getNum(
  )
  {

      }  //<--- this is a valid function even through there is new line

如何计算java

2 个答案: