Java Package getSpecificationVendor()用法及代碼示例

java.lang.Package類的getSpecificationVendor()方法用於獲取此包的規範的供應商。該方法以String的形式返回包的規範供應商。

用法:

public String getSpecificationVendor()

參數：此方法不接受任何參數。

返回值：如果已知，則此方法以String的形式返回包的規範供應商。否則返回null

下麵的程序演示了getSpecificationVendor()方法。

示例1:

// 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()); 
    } 
}

輸出：

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

示例2:

// Java 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()); 
    } 
}

輸出：

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

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

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