First, You should understand “streaming” in Java because all “Readers” in Java are built upon this concept. File Streaming File streaming is carried out by the FileInputStream object in Java. // it reads a byte at a time and stores into the ‘byt’ variable int byt; while((byt = fileInputStream.read()) != -1) { fileOutputStream.write(byt); } This … Read more
Reading happens asynchronously. You need to provide a custom onload callback that defines what should happen when the read completes: $(document).ready(function(){ $(‘#file_input’).on(‘change’, function(e){ readFile(this.files[0], function(e) { // use result in callback… $(‘#output_field’).text(e.target.result); }); }); }); function readFile(file, onLoadCallback){ var reader = new FileReader(); reader.onload = onLoadCallback; reader.readAsText(file); } (See the Fiddle.) Note that readFile does … Read more
An InputStream is the raw method of getting information from a resource. It grabs the data byte by byte without performing any kind of translation. If you are reading image data, or any binary file, this is the stream to use. A Reader is designed for character streams. If the information you are reading is … Read more
Your application is failing for big files because you’re reading the full file into memory before processing it. This inefficiency can be solved by streaming the file (reading chunks of a small size), so you only need to hold a part of the file in memory. A File objects is also an instance of a … Read more
If your jar is on the classpath: InputStream is = YourClass.class.getResourceAsStream(“1.txt”); If it is not on the classpath, then you can access it via: URL url = new URL(“jar:file:/absolute/location/of/yourJar.jar!/1.txt”); InputStream is = url.openStream();
no. BufferedReader.close() closes the stream according to javadoc for BufferedReader and InputStreamReader as well as FileReader.close() does.
Below Function converts the Excel sheet (XLSX format) data to JSON. you can add promise to the function. <script src=”https://cdnjs.cloudflare.com/ajax/libs/xlsx/0.8.0/jszip.js”></script> <script src=”https://cdnjs.cloudflare.com/ajax/libs/xlsx/0.8.0/xlsx.js”></script> <script> var ExcelToJSON = function() { this.parseExcel = function(file) { var reader = new FileReader(); reader.onload = function(e) { var data = e.target.result; var workbook = XLSX.read(data, { type: ‘binary’ }); workbook.SheetNames.forEach(function(sheetName) { … Read more
I believe your new to java and your error is “note.txt” doesnt exist. but like most new people you have it wrong place. Here is screen shot from eclipse to to where to have it. it sits in your root java project directory and not in the src folder