类类getComponentType()方法 (Class class getComponentType() method)

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

  getComponentType()方法在java.lang包中可用。

• getComponentType() method is used to returns the Class denoting the component type of an array.

  getComponentType()方法用于返回表示数组的组件类型的Class。

• getComponentType() 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.

  getComponentType()方法是一个非静态方法，只能通过类对象访问，如果尝试使用类名称访问该方法，则会收到错误消息。

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

  返回Class时， getComponentType()方法不会引发异常。

Syntax:

句法：

    public Class getComponentType();

Parameter(s):

参数：

• It does not accept any parameter.

  它不接受任何参数。

Return value:

返回值：

The return type of this method is Class, it returns the component type in terms of "Class" type.

该方法的返回类型为Class ，它以“ Class”类型的形式返回组件类型。

Example:

例：

// Java program to demonstrate the example
// of Class getComponentType() method of Class
public class GetComponentTypeOfClass {public static void main(String[] args) {// Creating an array of Integer type
Integer[] num = new Integer[] {10,
20,
30
};
// It returnd the Class denoting the component type
Class cl = num.getClass();
// By using getComponentType() method is used to
// get the component of the given Class
Class comp_type = cl.getComponentType();
// If any component exists
if (comp_type != null)
System.out.println("Component Type: " + comp_type);
else
System.out.println("No Component Type Associated");
}
}

Output

输出量

Component Type: class java.lang.Integer

翻译自: https://www.includehelp.com/java/class-class-getcomponenttype-method-with-example.aspx