package ThreadTest;

import java.io.File;

import java.io.IOException;

import java.security.PublicKey;

import org.omg.CORBA.PUBLIC_MEMBER;

public class FileTest {

public static void main(String[] args) {

File file = new File(".");

System.out.println(file.getName());

//获取相对路径可能出错，下文将返回NULL

System.out.println(file.getParent());

//获取绝对路径

System.out.println(file.getAbsolutePath());

//获取上一级路径

System.out.println(file.getAbsolutePath());

//在当前路径下创建一个临时文件

try {

File tepFile = File.createTempFile("aaa",".txt",file);

//JVM退出时删除文件

// tepFile.deleteOnExit();

System.out.println(tepFile.getAbsolutePath());

} catch (IOException e) {

// TODO Auto-generated catch block

e.printStackTrace();

}

File newFile = new File(System.currentTimeMillis()+"time");

System.out.println(newFile.getAbsolutePath());

try {

newFile.createNewFile();

} catch (IOException e) {

// TODO Auto-generated catch block

e.printStackTrace();

}

String fileList[] = file.list();

System.out.println("当前路径下所有文件和路径如下");

for(String fileName :fileList){

System.out.println("当前路径下文件"+fileName);

}

//listRoot静态方法列出所有磁盘根路径

File[] roots = File.listRoots();

System.out.println("系统所有根路径如下");

for(File root:roots){

System.out.println(root);

}

}

public static void test1(){

File file = new File(".");

// String [] numList = file.list((dir,name) ->name.endsWith(".java")) || new File(name).isDirectory();

}

}