图说jdk1.8新特性（5）--- 编译器新特性

/**

     * Returns the name of the parameter.  If the parameter's name is

     * {@linkplain #isNamePresent() present}, then this method returns

     * the name provided by the class file. Otherwise, this method

     * synthesizes a name of the form argN, where N is the index of

     * the parameter in the descriptor of the method which declares

     * the parameter.

     *

     * @return The name of the parameter, either provided by the class

     *         file or synthesized if the class file does not provide

     *         a name.

     */

    public String getName() {

        // Note: empty strings as paramete names are now outlawed.

        // The .equals("") is for compatibility with current JVM

        // behavior.  It may be removed at some point.

        if(name == null || name.equals(""))

            return "arg" + index;

        else

            return name;

    }

说明：

jdk1.8反射包增加了Parameter类，通过该类的getName方法能在运行时得到参数的名称

如果没有通过-parameters指定编译器在编译的时候将参数名编译进去，那么得到的参数名称将会是arg1、arg2、arg3这种默认的参数名

巴特西

图说jdk1.8新特性（5）--- 编译器新特性

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