import java.io.File;//引入File类
import java.io.IOException;//引入IOException类
public class testFile{
      public static void main(String[] args)
      {
            File file =new File("C:\\","123.txt");//创建file对象
            if(!file.exists())//判断123.txt是否存在
            {
                  //方法createNewFile会抛出IOException异常，必须对其
                  //进行捕获，否则通不过编绎
                  try
                  {
                        file.createNewFile();
                        System.out.println("文件123.txt创建成功。");
                  }
                  catch(IOException ee)
                  {
                        System.out.println("文件123.txt创建失败!");
                  }
            }
      }
}

--转自

该贴由koei123转至本版2015-7-14 11:08:51