用示例在Java中打包 getSpecificationVendor() 方法

Java.lang.Package 类的getSpecificationVendor()方法用于获取此包的规范的供应商。该方法将包的规范供应商作为字符串返回。
句法：

public String getSpecificationVendor()

参数：此方法不接受任何参数。
返回值：此方法将包的规范供应商作为字符串返回（如果已知）。否则返回 null
下面的程序演示了 getSpecificationVendor() 方法。
示例 1：

Java

// Java program to demonstrate
// getSpecificationVendor() method
 
public class Test {
    public static void main(String[] args)
    {
 
        // returns the Package
        // object for this package
        Package myPackage
            = Package.getPackage("java.lang");
 
        System.out.println(
            "Package represented"
            + " by myPackage: "
            + myPackage.toString());
 
        // Get the specification vendor
        // of myPackage using
        // getSpecificationVendor() method
        System.out.println(
            "Specification vendor"
            + " of myPackage: "
            + myPackage.getSpecificationVendor());
    }
}

输出：

Package represented by myPackage: package java.lang, Java Platform API Specification, version 1.8
Specification vendor of myPackage: Oracle Corporation

示例 2：

Java

// Java program to demonstrate
// getSpecificationVendor() method
 
public class Test {
 
    public static void main(String[] args)
    {
 
        // returns the Package
        // object for this package
        Package myPackage
            = Package.getPackage("java.io");
 
        System.out.println(
            "Package represented"
            + " by myPackage: "
            + myPackage.toString());
 
        // Get the specification vendor
        // of myPackage using
        // getSpecificationVendor() method
        System.out.println(
            "Specification vendor"
            + " of myPackage: "
            + myPackage.getSpecificationVendor());
    }
}

输出：

Package represented by myPackage: package java.io, Java Platform API Specification, version 1.8
Specification vendor of myPackage: Oracle Corporation

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