File的创建
package cn.lijun.demo3; import java.io.File; import java.io.IOException; // 创建文件功能 如果文件已经存在 不再创建 public class FileDemo2 { public static void main(String[] args) throws IOException { fun3(); } //删除 public static void fun3(){ File file1 =new File("c:\\baixiaolong\\b.txt"); boolean b = file1.delete(); System.out.println(b); } //创建目录 public static void fun2() throws IOException{ File file =new File("c:\\baixiaolong"); boolean m = file.mkdirs(); System.out.println(m); File file1 =new File("c:\\baixiaolong\\b.txt"); boolean s = file1.createNewFile(); System.out.println(s); } public static void fun() throws IOException{ File file =new File("c:\\a.txt"); boolean b = file.createNewFile(); System.out.println(b); } }