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 }