我要在Ｈello.txt中输入内容应该怎么做呢？
public class Ex6_2 {
public Ex6_2()
{
}
public static void main(String arg[])throws IOException{
File f = new File("D:" + File.separator + "Hello.txt");
f.createNewFile();
FileInputStream in=new FileInputStream("Hello.txt");
}
------解决方案--------------------
- Java code
import java.io.*; public class Ex6_2 { public static void main(String arg[])throws IOException{ File f = new File("D:" + File.separator + "Hello.txt"); f.createNewFile(); s1 += "要添加的内容"; BufferedWriter output = new BufferedWriter(new FileWriter(f)); output.write(s1); output.close(); }
------解决方案--------------------
write
------解决方案--------------------
S1应该是String类型的变量，1楼可能忘了在S1前加String修饰
------解决方案--------------------
String str=new String("自己要输入的内容");
File file = new File("D:\Hello.txt");
FileWriter writer=new FileWriter(file);
writer.write(str);
writer.close() ;
------解决方案--------------------
File file=new File("c:/mulu.txt");
FileWriter filewriter=new FileWriter(file);
String s=new String();
filewrite.write(s);
filewrite.close();
------解决方案--------------------
File对象不能写文件的，必须用流才可以写入，如FileWriter或FileOutputStream