How-to articles, tricks, and solutions about IO
To get an OutputStream into a String, you can use a ByteArrayOutputStream as the OutputStream and then use the toString() method of the ByteArrayOutputStream to get the contents of the stream as a string.
To check if a file exists in Java, you can use the exists method of the File class from the java.io package. This method returns true if the file exists, and false if it doesn't. Here's an example of how you can use this method:
To get the file extension of a file in Java, you can use the File class and its getName() method to get the file name, and then use the substring() method of the String class to extract the extension from the file name.
There are several ways to read an InputStream and convert it to a String in Java. One way is to use the BufferedReader and InputStreamReader classes to read the InputStream line by line, and use a StringBuilder to construct the final String:
To append text to the end of an existing file in Java, you can use the Files.write() method from the java.nio.file package. This method allows you to write a sequence of characters to a file in a single operation.
It is common for the Scanner class's next() and nextFoo() methods (where Foo is any primitive type such as Int, Double, etc.) to skip over newline characters in the input. This is because these methods are designed to read only the next token in the input