JAVA I/O流练习1

往D盘中的JAVA复习文件夹中写数据：

数据改了一下哈：

import java.io.*;
import java.util.Scanner;
public class Test {public static void main(String[] args) throws IOException {String fileName="D:JAVA复习\\grade.txt";FileWriter writer = new FileWriter(fileName);writer.write("C++ 98\n");writer.write("高数 92\n");writer.write("大物 92\n");writer.write("体育 96\n");writer.write("英语 92\n");writer.close();}
}

 

从D盘JAVA复习的文件夹里面找到Hello.txt读取文本并显示在屏幕上

import java.io.*;
public class Test {public static void main ( String[] args ) {String fileName = "D:JAVA复习\\Hello.txt" , line;try {BufferedReader in=new BufferedReader(new FileReader( fileName));line = in.readLine();   //读取一行内容while ( line != null ) {System.out.println( line );line = in.readLine();}in.close();}catch ( IOException iox ) {System.out.println("Problem reading " + iox.getMessage() );}}
}