java jar包示例

包类的isCompatibleWith()方法 (Package Class isCompatibleWith() method)

• isCompatibleWith() method is available in java.lang package.

  isCompatibleWith()方法在java.lang包中可用。

• isCompatibleWith() method is used to check the specification version of this package with the specification version of the desired or given package.

  isCompatibleWith()方法用于检查此程序包的规范版本与所需或给定程序包的规范版本。

• isCompatibleWith() method is a non-static method, it is accessible with the class object only and if we try to access the method with the class name then we will get an error.

  isCompatibleWith()方法是一种非静态方法，只能通过类对象访问，如果尝试使用类名称访问该方法，则会收到错误消息。

• isCompatibleWith() method may throw an exception at the time of comprising the package specification version.

  在包含程序包规范版本时， isCompatibleWith()方法可能会引发异常。

  NumberFormatException: In this exception, when the desired package specification version or current package specification version is not in the correct format.

  NumberFormatException ：在此异常中，当所需的软件包说明版本或当前软件包说明版本的格式不正确时。

Syntax:

句法：

public boolean isCompatibleWith(String des_pck_ver);

Parameter(s):

参数：

• String des_pck_ver – represents the specification version of the desired package.

  字符串des_pck_ver –表示所需软件包的规范版本。

Return value:

返回值：

The return type of this method is boolean, it returns the following values based on the given cases,

此方法的返回类型为boolean ，它根据给定的情况返回以下值：

• It returns true when this package specification version value is equal to or greater than the specification version of the desired package.

  当此程序包规范版本值等于或大于所需程序包的规范版本时，它返回true 。

• It returns false when this package specification version value is less than the specification version of the desired package.

  当此软件包规范版本值小于所需软件包的规范版本时，它返回false 。

Example:

例：

// Java program to demonstrate the example // of boolean isCompatibleWith(String des_pck_ver)// method of Package public class IsCompatibleWith {
       public static void main(String[] args) {
           // Get Package by using getPackage() method        Package pkg = Package.getPackage("java.util");        // By using isCompatibleWith(pkg_ver) method is to check         // version compatibility of this package with the given version        boolean pck_ver = pkg.isCompatibleWith("1.4.7");        // Display compatibility of the package        System.out.println("pkg.isCompatibleWith(1.4.7) = " + pck_ver);    }}

Output

输出量

pkg.isCompatibleWith(1.4.7) = false

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java jar包示例