【File类：构造方法的使用】

package com.companyname.common.test;

import java.io.File;

/**
 * @author shusheng
 * @description
 * @Email shusheng@yiji.com
 * @date 2018/10/12 14:22
 */
public class FileDemo1 {
    /**
     * File 类的构造方法的使用
     */
    public static void main(String[] args) {
        /**把D:aaaaaa.txt封装成一个File对象*/
        File file = new File("D:\aaaaaa.txt");
        System.out.println(file.getName());

        /**public File(String parent,String child)*/
        File file2 = new File("D:\", "aaaaaa.txt");
        System.out.println(file2.getName());

        /**public File(File parent,String child)*/
        File file3 = new File("D:\");
        File file4 = new File(file3, "aaaaaa.txt");
        System.out.println(file4.getName());

        /**以上三种方式效果一样*/

    }

}