Java Class getClassLoader()用法及代碼示例

java.lang.Class類的getClassLoader()方法用於獲取此實體的classLoader。該實體可以是類，數組，接口等。該方法返回此實體的classLoader。

用法:

public ClassLoader getClassLoader()

參數：此方法不接受任何參數。

返回值：此方法返回實體的ClassLoader。

下麵的程序演示了getClassLoader()方法。

示例1:

// Java program to demonstrate getClassLoader() method 
  
public class Test { 
    public static void main(String[] args) 
        throws ClassNotFoundException 
    { 
  
        // returns the Class object for this class 
        Class myClass = Class.forName("Test"); 
  
        System.out.println("Class represented by myClass: "
                           + myClass.toString()); 
  
        // Get the classLoader of myClass 
        // using getClassLoader() method 
        System.out.println("ClassLoader of myClass: "
                           + myClass.getClassLoader()); 
    } 
}

輸出：

Class represented by myClass: class Test
ClassLoader of myClass: sun.misc.Launcher$AppClassLoader@42a57993

示例2:

// Java program to demonstrate getClassLoader() method 
  
public class Test { 
  
    class Arr { 
    } 
  
    public static void main(String[] args) 
        throws ClassNotFoundException 
    { 
        // returns the Class object for Arr 
        Class arrClass = Arr.class; 
  
        // Get the classLoader of arrClass 
        // using getClassLoader() method 
        System.out.println("ClassLoader of arrClass: "
                           + arrClass.getClassLoader()); 
    } 
}

輸出：

ClassLoader of arrClass: sun.misc.Launcher$AppClassLoader@42a57993

參考： https://docs.oracle.com/javase/9/docs/api/java/lang/Class.html#getClassLoader–

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