为什么创建不出来文件呢，我也刷新了
package InputStreamDemo;
import java.io.File;
import java.io.IOException;
public class RandomAccessFileDemo {
RandomAccessFileDemo()throws IOException{
File Demo = new File("Demo");
if(!Demo.exists()){
Demo.mkdir();
}
File file = new File(Demo,"file.txt");
if(!file.exists()){
file.createNewFile();
}
}
public static void main(String[] args) {
try{
new RandomAccessFileDemo();
}catch(Exception e){
}
}
}
