import java.io.*;public class CreateFile{  String file_name;  String expand_name;  File file;  public CreateFile()  {    BufferedReader b = new BufferedReader(new InputStreamReader(System.in));    System.out.println("Please Enter the file name:");    try{        file_name = b.readLine();     }catch(IOException e){}    if(file_name!=null){      System.out.println("Please Enter the file expand name:");      try{          expand_name = b.readLine();       }catch(IOException e){}    }    else return;    try{        file = new File(file_name+"."+expand_name);        file.createNewFile();     }catch(IOException e){System.out.print("a");}  }  public static void main(String[] argv)  {    CreateFile creatFile = new CreateFile();  }}