java 根據類名示例化類

類的類getEnclosingClass()方法 (Class class getEnclosingClass() method)

• getEnclosingClass() method is available in java.lang package.

  getEnclosingClass()方法在java.lang包中可用。

• getEnclosingClass() method is used to return recent or immediately enclosing class of the underlying class.

  getEnclosingClass()方法用于返回基礎類的最近或立即封閉的類。

• getEnclosingClass() method is a non-static method, it is accessible with the class object only and if we try to access the method with the class name then we will get an error.

  getEnclosingClass()方法是一個非靜態方法，僅可通過類對象訪問，如果嘗試使用類名稱訪問該方法，則會收到錯誤消息。

• getEnclosingClass() method does not throw an exception at the time of returning Class object.

  返回Class對象時， getEnclosingClass()方法不會引發異常。

Syntax:

句法：

    public Class getEnclosingClass();

Parameter(s):

參數：

• It does not accept any parameter.

  它不接受任何參數。

Return value:

返回值：

The return type of this method is Class, it returns recently enclosing class of the underlying class.

該方法的返回類型為Class ，它返回基礎類的最近封閉類。

Note:

注意：

• When this class has no top class, null is returned.

  當此類沒有頂級類別時，將返回null 。

Example:

例：

// Java program to demonstrate the example 
// of Class getEnclosingClass () method of Class 
import java.lang.reflect.*;
public class GetEnclosingClassOfClass {
public GetEnclosingClassOfClass() {
// OuterClass is inside in GetEnclosingClassOfClass class 
// that means OuterClass is inner class of 
// GetEnclosingClassOfClass
class OuterClass {
public void outerMethod() {
// InnerClass is inside in OuterClass class that means
// InnerClass is inner class of OuterClass
class InnerClass {
public void innerMethod() {
System.out.println(getClass().getEnclosingClass());
}
}
System.out.println(getClass().getEnclosingClass());
// Creating an instance of InnerClass
InnerClass ic = new InnerClass();
ic.innerMethod();
}
}
// Creating an instance of OuterClass
OuterClass oc = new OuterClass();
oc.outerMethod();
}
public static void main(String[] args) {
GetEnclosingClassOfClass enclo_class = new GetEnclosingClassOfClass();
}
}

Output

輸出量

class GetEnclosingClassOfClass
class GetEnclosingClassOfClass$1OuterClass

翻譯自: https://www.includehelp.com/java/class-class-getenclosingclass-method-with-example.aspx

java 根據類名示例化類