📜  Java中的类 getPackage() 方法和示例

📅  最后修改于: 2022-05-13 01:54:45.897000             🧑  作者: Mango

Java中的类 getPackage() 方法和示例

Java.lang.Class 类getPackage()方法用于获取该实体的包。这个实体可以是一个类、一个数组、一个接口等。方法返回这个实体的包。
句法:

public Package getPackage()

参数:此方法不接受任何参数。
返回值:该方法返回该实体的
下面的程序演示了 getPackage() 方法。
示例 1:

Java
// Java program to demonstrate getPackage() method
 
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 Package of myClass
        // using getPackage() method
        System.out.println("Package of myClass: "
                           + myClass.getPackage());
    }
}


Java
// Java program to demonstrate getPackage() method
 
public class Test {
 
    public static void main(String[] args)
        throws ClassNotFoundException
    {
        // returns the Class object
        Class myClass = Class.forName("java.lang.String");
 
        // Get the package of myClass
        // using getPackage() method
        System.out.println("Package of myClass: "
                           + myClass.getPackage());
    }
}


输出:
Class represented by myClass: class Test
Package of myClass: null

示例 2:

Java

// Java program to demonstrate getPackage() method
 
public class Test {
 
    public static void main(String[] args)
        throws ClassNotFoundException
    {
        // returns the Class object
        Class myClass = Class.forName("java.lang.String");
 
        // Get the package of myClass
        // using getPackage() method
        System.out.println("Package of myClass: "
                           + myClass.getPackage());
    }
}
输出:
Package of myClass: package java.lang,
 Java Platform API Specification,
 version 1.8

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