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Most efficient way to check if a file is empty in Java on Windows
How to a check if a file is empty in Java 7?
I tried it using the available() method from ObjectInputStream, but it returns always zero even if the the file contains data.
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You can use the find command and other options as follows. The -s option to the test builtin check to see if FILE exists and has a size greater than zero. It returns true and false values to indicate that file is empty or has some data.
#include<iostream> #include<fstream> using namespace std; int main() { ifstream read("test. txt"); if(! read) return 0; bool isEmpty = read. peek() == EOF; cout << boolalpha << "test …
File file = new File("file_path");
System.out.println(file.length());
File file = new File(path);
boolean empty = !file.exists() || file.length() == 0;
which can shortened to:
boolean empty = file.length() == 0;
since according to documentation the method returns
The length, in bytes, of the file denoted by this abstract pathname, or 0L if the file does not exist
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