Iffilenameis empty or null,getExtension(String filename)will return the instance it was given. Otherwise, it returns extension of the filename. To do this it uses the methodindexOfExtension(String)which, in turn, useslastIndexof(char)to find the last occurrence of the ‘.’. These methods...
publicstaticStringgetFileExtensionUsingJavaNIO(StringfileName){Pathpath=Paths.get(fileName);Stringextension="";if(Files.exists(path)){extension=path.getFileName().toString();intdotIndex=extension.lastIndexOf(".");if(dotIndex!=-1&&dotIndex!=0){extension=extension.substring(dotIndex+1);}else{ext...
lastIndexOf('.') + 1); } else { return "File don't have extension"; } } public static void main(String[] args) { File file = new File("sample.txt"); System.out.println(getFileExtension(file)); File file1 = new File("sample"); System.out.println(getFileExtension(file1)); ...
在此发行版中,对于任何 zip 目录条目,从 java.util.zip.ZipFile.getEntry() 返回的 ZipEntry 实例的名称始终以 / 结尾。 要还原到以前的行为,请将系统属性 jdk.util.zip.ensureTrailingSlash 设置为 'false'。 做出此更改是为了修复 JDK 8u141 中引入的回归,该回归在验证已签名 JAR 时会导致某些 WebStart...
String extension = "";int i = fileName.lastIndexOf('.');if&...
String fileName=tmpFile.getName(); System.out.println(fileName);} } 使用split publicclasstest {publicstaticvoidmain(String[] args) { String filePath= "E:\\test\\test.dxf";//带扩展名的文件名String temp[] = filePath.split("\\\"); String...
六. org.apache.commons.io.FilenameUtils 代码语言:javascript 代码运行次数:0 运行 AI代码解释 getExtension:返回文件后缀名 getBaseName:返回文件名,不包含后缀名 getName:返回文件全名 concat:按命令行风格组合文件路径(详见方法注释) removeExtension:删除后缀名 normalize:使路径正常化 wildcardMatch:匹配通配符 seper...
publicstaticvoidlx3(){//判断文件名的后缀。//isExtension(String fileName,String ext):判断fileName是否是ext后缀名;booleanb = FilenameUtils.isExtension("ja.txt","rar"); System.out.println(b); } lx3: publicstaticvoidlx2(){//getname 获取文件名。String name = FilenameUtils.getName("D:\\ja...
publicclassFileSearchimplementsSearch{@OverridepublicList<String>searchDoc(String keyword){System.out.println("文件搜索 "+keyword);returnnull;}} 数据库搜索实现 代码语言:javascript 代码运行次数:0 运行 AI代码解释 publicclassDatabaseSearchimplementsSearch{@OverridepublicList<String>searchDoc(String keyword){...
As filenames are essentially Strings, we can manipulate the filename String to extract the extension, which is the substring after the last dot: String getFileExtension(String filename) { if (filename == null) { return null; } int dotIndex = filename.lastIndexOf("."); if (dotIndex ...