字符流緩沖區原理之裝飾模式
阿新 • • 發佈：2018-01-25
turn dem append ngs except new public lin ktr import java.io.FileReader;
import java.io.IOException;
import java.io.Reader;
import java.io.IOException;
import java.io.Reader;
/**
- 模擬字符流緩沖區 readline（）
- 裝飾模式
- @author WangShuang
-
*/
public class Demo {public static void main(String[] args) {
MyBufferedReader my = null;
try {
FileReader fr = new FileReader("c:\字符流緩沖區.txt");
my = new MyBufferedReader(fr);String buff = null;
while((buff = my.myReadLine())!=null){
System.out.println(buff);
}
} catch (Exception e) {
throw new RuntimeException("讀取錯誤");
}finally {
try {
if(my!=null)
my.close();
} catch (IOException e) {
e.printStackTrace();
}
}}
}
class MyBufferedReader extends Reader {
Reader in = null;
public MyBufferedReader(Reader in) {this.in = in;
}
//增強的方法
public String myReadLine() throws IOException{
StringBuffer sb = new StringBuffer();
int ch = 0;
while((ch = in.read())!=-1){
if(ch == ‘\r‘)
continue;
if(ch== ‘\n‘)
return sb.toString();
else
sb.append((char)ch);
}
if(sb.length()!=0){
return sb.toString();
}
return null;}
@Override
br/>}
@Override
return in.read(cbuf, off, len);}@Override
br/>}
@Override
in.close();}
}
字符流緩沖區原理之裝飾模式