用示例在 Java 中类 getPackage()方法
原文:https://www . geesforgeks . org/class-getpackage-method-in-Java-with-examples/
java.lang.Class 类 的 getPackage() 方法用于获取该实体的包。这个实体可以是类、数组、接口等。方法返回该实体的包。
语法:
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包。
下面的程序演示了 getPackage()方法。
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
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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