在D盘创建tester1.txt,并写入若干行文本，然后，从testre1.txt中读取文本并显示在屏幕上。需要用的FileWriter、BufferedWriter、FileReader、BufferedReader类
import java.io.*;
import java.util.Scanner;
public class Write_display {
public static void main(String[] args)throws IOException{
BufferedWriter w = new BufferedWriter(new FileWriter("D:\\tester1.txt"));
BufferedReader r = new BufferedReader(new FileReader("D:\\tester1.txt"));
Scanner in = new Scanner(System.in);
String s = in.nextLine();
int c;
//向D盘的文件text.txt写入数据
w.write(s);
w.flush();
w.close();
//从text.txt中读取数据并输出
while((c = r.read()) != -1)
System.out.print((char) c);
r.close();
}
}
如果D盘中已经存在了tester1.txt这个文件并且里面已经有了文本，则可以不用再创建该文件和向该文件写入数据
import java.util.Scanner;
public class Write_display {
public static void main(String[] args)throws IOException{
BufferedWriter w = new BufferedWriter(new FileWriter("D:\\tester1.txt"));
BufferedReader r = new BufferedReader(new FileReader("D:\\tester1.txt"));
Scanner in = new Scanner(System.in);
String s = in.nextLine();
int c;
//向D盘的文件text.txt写入数据
w.write(s);
w.flush();
w.close();
//从text.txt中读取数据并输出
while((c = r.read()) != -1)
System.out.print((char) c);
r.close();
}
}
如果D盘中已经存在了tester1.txt这个文件并且里面已经有了文本，则可以不用再创建该文件和向该文件写入数据
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第1个回答 2010-05-16
不用FileWriter,BufferedWriter.
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import java.io.*;
public class Test {
String s=null;
try{
BufferedReader br=new BufferedReader(new FileReader("D:/tester1.txt"));
while((s=br.readLine())!=null) {
System.out.println(s);
}
}catch(FileNotFoundException ee) {}
catch(IOException e) {}
br.close();
}
}
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代码直接写的，没测试，不过思路过程就是这样！本回答被提问者采纳
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import java.io.*;
public class Test {
String s=null;
try{
BufferedReader br=new BufferedReader(new FileReader("D:/tester1.txt"));
while((s=br.readLine())!=null) {
System.out.println(s);
}
}catch(FileNotFoundException ee) {}
catch(IOException e) {}
br.close();
}
}
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代码直接写的，没测试，不过思路过程就是这样！本回答被提问者采纳
