2020.8.6第三十一天

1.今天学习打印流

以后打印文件首选PrintStream

 1 import java.io.FileNotFoundException;
 2 import java.io.FileOutputStream;
 3 import java.io.PrintStream;
 4 public class PrintStreamDemo{
 5 public static void main (String[] args) throws FileNotFoundException{
 6 PrintStream out = new PrintStream (
 7 new FileOutputStream ("D:/Hello.txt"));
 8 out.println(true);
 9 out.println('A');
10 out.println(10.0);
11 out.println(12);
12 out.println("Hello");
13 Person p=new Person();
14 p.setAge (20);
15 p.setName ("sky");
16 out.println (p);
17 out.close();
18 }
19 }

 

 2.今天写了好长时间读后感

3.明天继续学习第12章