Java Package getSpecificationTitle()用法及代碼示例

java.lang.Package類的getSpecificationTitle()方法用於獲取此程序包規範的標題。該方法以String的形式返回包的規範標題。

用法:

public String getSpecificationTitle()

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標題。否則返回null

下麵的程序演示了getSpecificationTitle()方法。

示例1:

// Java program to demonstrate 
// getSpecificationTitle() 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 title of myPackage 
        // using getSpecificationTitle() method 
        System.out.println( 
            "Specification title of myPackage: "
            + myPackage.getSpecificationTitle()); 
    } 
}

輸出：

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

示例2:

// Java program to demonstrate 
// getSpecificationTitle() 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 getSpecificationTitle() method 
        System.out.println( 
            "Specification title of myPackage: "
            + myPackage.getSpecificationTitle()); 
    } 
}

輸出：

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

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

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