Java类类getComponentType（）方法与示例

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