Java获取文件后缀名详解编程语言

import java.io.File; 
 
public class Test { 
 
	/** 
	 *author: blog.ytso.com 
	 */ 
	public static void main(String[] args) { 
		File file = new File("HelloWorld.java"); 
		String fileName = file.getName(); 
		String suffix = fileName.substring(fileName.lastIndexOf(".") + 1); 
		System.out.println(suffix); 
	} 
}

作者：blog.ytso.com