用示例在Java中打包 getImplementationVendor() 方法

Java.lang.Package 类的getImplementationVendor()方法用于获取该包实现的供应商。该方法将包的实现供应商作为字符串返回。

句法：

public String getImplementationVendor()

参数：此方法不接受任何参数。
返回值：此方法将包的实现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 getImplementationVendor() 方法。

示例 1：

Java

// Java program to demonstrate
// getImplementationVendor() 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 implementation vendor of myPackage
        // using getImplementationVendor() method
        System.out.println(
            "Implementation vendor of myPackage: "
            + myPackage.getImplementationVendor());
    }
}

输出：

Package represented by myPackage: package java.lang, Java Platform API Specification, version 1.8
Implementation vendor of myPackage: N/A

示例 2：

Java

// Java program to demonstrate
// getImplementationVendor() 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 name of myPackage
        // using getImplementationVendor() method
        System.out.println(
            "Implementation vendor of myPackage: "
            + myPackage.getImplementationVendor());
    }
}

输出：

Package represented by myPackage: package java.io, Java Platform API Specification, version 1.8
Implementation vendor of myPackage: N/A

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