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Write a Java Program to Get the File Extension
PROGRAM: Java Program to Get the File Extension
/*Java Program to Get the File Extension*/
1: Java Program to get the file extension
import java.io.File;
class Main {
public static void main(String[] args) {
File file = new File(“Test.java”);
// convert the file name into string
String fileName = file.toString();
int index = fileName.lastIndexOf(‘.’);
if(index > 0) {
String extension = fileName.substring(index + 1);
System.out.println(“File extension is ” + extension);
}
}
}
2: Get the file extension of all files present in a directory
import java.io.File;
class Main {
public static void main(String[] args) {
File directory = new File(“Directory”);
// list all files present in the directory
File[] files = directory.listFiles();
System.out.println(“Files\t\t\tExtension”);
for(File file : files) {
// convert the file name into string
String fileName = file.toString();
int index = fileName.lastIndexOf(‘.’);
if(index > 0) {
String extension = fileName.substring(index + 1);
System.out.println(fileName + “\t” + extension);
}
}
}
}
