File的简单例子

package MyFile;
import java.io.File;
import java.io.*;
public class TestFile{
public static void main(String[] args){
//String separator=File.separator;
String filename="myfile.txt";
String directory="mydir1/mydir2";
File f=new File(directory,filename);
if(f.exists()){
System.out.println("文件名："+f.getAbsolutePath());
System.out.println("文件大小："+f.length());
}else{
f.getParentFile().mkdirs();
try{
f.createNewFile();
}catch(IOException e){
e.printStackTrace();
}
}
}
}