创建文件夹

package filetest;

import java.io.File;
import java.io.IOException;

public class FileDemo {

public static void main(String[] args) throws IOException {
method_2();
}

public static void method_2() throws IOException{

File dir=new File("abc");
System.out.println("mkdir: "+dir.mkdir());  //创建文件夹

File dir2=new File("a\\b\\c\\d\\e");
System.out.println("mkdirs: "+dir2.mkdirs()); //创建多级文件夹
}
}