Java Class getPackage()用法及代码示例

java.lang.Class类的getPackage()方法用于获取此实体的包。该实体可以是类，数组，接口等。该方法返回该实体的包。

用法:

public Package getPackage()

参数：此方法不接受任何参数。

返回值：此方法返回此实体的包。

下面的程序演示了getPackage()方法。

示例1:

// 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()); 
    } 
}

输出：

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

示例2:

// 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–

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注：本文由纯净天空筛选整理自srinam大神的英文原创作品 Class getPackage() method in Java with Examples。非经特殊声明，原始代码版权归原作者所有，本译文未经允许或授权，请勿转载或复制。