Java示例代码

记录一些典型的Java代码。

一、文件读取

 1 public class Test4 {

 2     public static void main(String[] args) {

 3         try {

 4             FileReader fdFileReader=new FileReader("bitch.txt");

 5             BufferedReader bReader=new BufferedReader(fdFileReader);

 6             String my=bReader.readLine();

 7             while (my!=null) {

 8                 System.out.println(my);

 9                 my=bReader.readLine();

10             }

11             bReader.close();

12         } catch (IOException e) {

13             // TODO: handle exception

14             System.out.println("找不到指定文件");

15         }

16     }

17 }

二、文件写入

 1 public class Test

 2 {

 3     public static void main(String[] args)

 4     {

 5         try {

 6             String content = "Thank you for your fish.";

 7

 8             File file = new File("new.txt");

 9

10             // create the file if doesn‘t exists

11             if (!file.exists()) {

12                 file.createNewFile();

13             }

14

15             FileWriter fw = new FileWriter(file.getAbsoluteFile());

16             BufferedWriter bw = new BufferedWriter(fw);

17             bw.write(content);

18             bw.close();

19

20         }

21         catch(IOException e) {

22             System.out.println("IO Problem");

23         }

24     }

25 }