Java File 类文件操作示例 - 创建、判断、获取信息、删除

import\ java.io.File;import\ java.io.IOException;public\ class\ FileDemo\ {\ public\ static\ void\ main(String[]\ args)\ {\ //\ 创建一个新的文件\ File\ file\ =\ new\ File("test.txt");\ try\ {\ //\ 创建文件\ boolean\ created\ =\ file.createNewFile();\ if\ (created)\ {\ System.out.println("文件创建成功");\ }\ else\ {\ System.out.println("文件已存在");\ }\ }\ catch\ (IOException\ e)\ {\ e.printStackTrace();\ }\ //\ 判断文件是否存在\ boolean\ exists\ =\ file.exists();\ System.out.println("文件是否存在："\ +\ exists);\ //\ 获取文件名\ String\ fileName\ =\ file.getName();\ System.out.println("文件名："\ +\ fileName);\ //\ 获取文件路径\ String\ filePath\ =\ file.getAbsolutePath();\ System.out.println("文件路径："\ +\ filePath);\ //\ 获取文件大小\ long\ fileSize\ =\ file.length();\ System.out.println("文件大小："\ +\ fileSize\ +\ "\ bytes");\ //\ 判断是否是文件\ boolean\ isFile\ =\ file.isFile();\ System.out.println("是否是文件："\ +\ isFile);\ //\ 判断是否是目录\ boolean\ isDirectory\ =\ file.isDirectory();\ System.out.println("是否是目录："\ +\ isDirectory);\ //\ 删除文件\ boolean\ deleted\ =\ file.delete();\ if\ (deleted)\ {\ System.out.println("文件删除成功");\ }\ else\ {\ System.out.println("文件删除失败");\ }\ }\ }