Java program to count number of lines in text file

Add a comment. Active Oldest Votes. Improve this answer. Thusitha Thilina Dayaratne Thusitha Thilina Dayaratne 5, 4 4 gold badges 37 37 silver badges 66 66 bronze badges. For the casual reader, please note readAllLines is not intented for reading large files. Or the shortcut Files. Thanks MattByrne, I've edited the answer according to your suggestion — superbob. Given how Java 8 streams work, I suppose it is a good method for large files also.

However it should be tested to make it sure. Community Bot 1 1 1 silver badge. Edgar H Edgar H 1, 1 1 gold badge 17 17 silver badges 29 29 bronze badges. Ktifa S. Ktifa 1 1 silver badge 9 9 bronze badges. It means that you need to learn how to use the site, and when you are sufficiently experienced, you will be granted the privilege of commenting. Until then, please provide answers that don't require clarification from the asker. Woah, that's nice of you If there is an odd amount of integers, it should print an error message.

I got the program to print out the max, but I cant figure out how to make it count the amount of integers. The program compiles, but runs a blank screen. What did I do wrong? If reader. Stack Overflow for Teams — Collaborate and share knowledge with a private group. Create a free Team What is Teams? Collectives on Stack Overflow. Learn more. How to count the amount of integers in a textfile Java? Ask Question. Asked 5 years, 11 months ago. Active 5 years, 11 months ago.

Reference Materials String. Start Learning Java. Explore Java Examples. Create String from Contents of a File. Append Text to an Existing File. Convert File to byte array and Vice-Versa. Create Directories. Get all Files Present in a Directory. It creates a FileInputStream by opening a connection to an actual file named by the File object file in the file system. Throws: FileNotFoundException — if the file does not exist, is a directory rather than a regular file, or for some other reason cannot be opened for reading.

SecurityException — if a security manager exists and its checkRead method denies read access to the file. InputStreamReader package. It creates an InputStreamReader that uses the default charset. BufferedReader Reader in : This function is present under the java. BufferedReader package. It creates a buffering character-input stream that uses a default-sized input buffer. Skip to content. Change Language.