字符缓冲区读取文件BufferedReader

readline

import java.io.BufferedReader;
import java.io.FileReader;
import java.io.IOException;
/*readLine读取文本行
* 如果到末尾返回null
*
* */
public class Demo04BufferedReader {
    public static void main(String[] args) throws IOException {
        BufferedReader br=new BufferedReader(new FileReader("F:\basic\untitled13\src\it\cast\day15\demo04\a.txt"));
        String line;
        while ((line=br.readLine())!=null){
            System.out.println(line);
        }

        br.close();
    }
}