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

import java.io.FileNotFoundException;
import java.io.FileOutputStream;
import java.io.PrintStream;
public class PrintStreamDemo{
public static void main (String[] args) throws FileNotFoundException{
PrintStream out = new PrintStream (
new FileOutputStream ("D:/Hello.txt"));
out.println(true);
out.println('A');
out.println(10.0);
out.println(12);
out.println("Hello");
Person p=new Person();
p.setAge (20);
p.setName ("sky");
out.println (p);
out.close();
}
}

 

 2.今天写了好长时间读后感

3.明天继续学习第12章