Java中的类 getCanonicalName() 方法和示例

Java.lang.Class 类的getCanonicalName()方法用于获取该类的规范名称，即Java语言规范定义的规范名称。该方法以String的形式返回该类的规范名称。
句法：

public String getCanonicalName()

参数：此方法不接受任何参数。
返回值：该方法以String的形式返回该类的规范名称。
下面的程序演示了 getCanonicalName() 方法。
示例 1：

Java

// Java program to demonstrate getCanonicalName() method
 
import java.util.*;
 
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 canonical name of myClass
        // using getCanonicalName() method
        System.out.println("CanonicalName of myClass: "
                           + myClass.getCanonicalName());
    }
}

输出：

Class represented by myClass: class Test
CanonicalName of myClass: Test

示例 2：

Java

// Java program to demonstrate getCanonicalName() method
 
import java.util.*;
 
class Main {
 
    public Object obj;
 
    Main()
    {
 
        class Arr {
        };
 
        obj = new Arr();
    }
 
    public static void main(String[] args)
        throws ClassNotFoundException
    {
        Main t = new Main();
 
        // returns the Class object
        Class myClass = t.obj.getClass();
 
        System.out.println("Class represented by myClass: "
                           + myClass.toString());
 
        // Get the canonical name of myClass
        // using getCanonicalName() method
        System.out.println("CanonicalName of myClass: "
                           + myClass.getCanonicalName());
    }
}

输出：

Class represented by myClass: class Main$1Arr
CanonicalName of myClass: null

参考： https://docs.oracle.com/javase/9/docs/api/ Java/lang/Class.html#getCanonicalName–