1 import java.io.File;
 2         import java.io.FileWriter;
 3         import java.io.IOException;
 4 
 5 public class work {
 6 
 7     public static void main(String[] args) {
 8         //在电脑D盘下创建一个文件为HelloWorld.txt文件
 9         File file=new File("D:","HelloWorld.txt");
10         File file3=new File("E:","helloWorld.txt");
11         try {
12             FileWriter w = new FileWriter(file);
13             w.write("hello word!");
14             w.close();
15         }catch (IOException e ){
16             e.printStackTrace();
17         }
18         //创建文件，返回一个布尔值
19         boolean isCreate;
20         try {
21             isCreate = file.createNewFile();
22             if (isCreate) {
23                 System.out.println("创建文件成功！");
24             }else {
25                 System.out.println("创建文件失败！文件已经存在");
26             }
27         } catch (IOException e) {
28             System.out.println("创建文件失败！");
29         }
30 
31         if (file.renameTo(file3)) {
32             System.out.println("文件移动成功！");
33         } else {
34             System.out.println("文件移动失败");
35         }
36         System.out.println(file.exists());
37         }
38     }