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How to determine whether a file is empty in java

在File类中并没有提供判断文件是否为空的方法,但可以借助length()方法的返回值进行判断。(推荐:java视频教程

length()方法定义为:public long length()

如果文件不存在或文件为空时,length()方法返回0。

示例代码如下:

	File file = new File("D:\\test.txt");
	if(file.exists() && file.length)() == 0) {
		System.out.println("文件为空!");
	}

更多java知识请关注java基础教程栏目。

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