2020.8.2第二十七天

1.今天学习内存操作流

import java.io. ByteArrayInputStream;
import java.io.ByteArrayOutputStream;
import java.io. IOException;
import java.io. InputStream;
import java. io. OutputStream;
public class ByteOutputStreamDemo{
public static void main(String[] args) throws IOException {
outin() ;
}
public static void outin() throws IOException {
String info = "hello Java";
InputStream input =new ByteArrayInputStream (info.getBytes()) ;
OutputStream output = new ByteArrayOutputStream();
int temp = 0;
while ((temp - input.read()) != -1)
output .write (Character . toUpperCase ((char) temp)) ;
String str = output.toString(); 
input.close() ;
output.close() ;
System. out. println(str) ;
}
}

2.遇到的问题;不知道 内存怎么输入输出；

3.明天继续学习第12章；