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

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

  getClasses()方法在java.lang包中可用。

• getClasses() method is used to return an array that contains Class objects denoting all the public classes and interfaces that are a member of the class denoted by this Class object and it includes public class and interface members inherited from parent classes.

  getClasses()方法用于返回一個數組，該數組包含表示所有公共類和接口的Class對象，這些公共類和接口是此Class對象所表示的類的成員，并且包括從父類繼承的公共類和接口成員。

• getClasses() 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.

  getClasses()方法是一個非靜態方法，只能通過類對象進行訪問，如果嘗試使用類名訪問該方法，則會收到錯誤消息。

• getClasses() method may throw SecurityException at the time of checking security constraints.SecurityException: This exception raise when security manager exists.

  在檢查安全性約束時， getClasses()方法可能會引發SecurityException。SecurityException：當安全管理器存在時引發此異常。

Syntax:

句法：

    public Class[] getClasses();

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 an array of Class objects denoting the public members of this class.

此方法的返回類型為Class [] ，它返回表示該類的公共成員的Class對象的數組。

Example:

例：

// Java program to demonstrate the example 
// of Class[] getClasses() method of  Class 
public class GetClassesOfClass {
public static void main(String[] args) throws Exception {
// It returns the Class object attached 
// with the given classname
Class cl = Class.forName("java.lang.ClassLoader");
// It returns an array of Class objects denotes the public
// member of the class "java.lang.ClassLoader"
Class[] public_classes = cl.getClasses();
// Traversing ClassLoader class
for (int i = 1; i <= public_classes.length; ++i) {
System.out.print("Class Name: ");
System.out.println(public_classes[i].getName());
}
}
}

Output

輸出量

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