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To use the Scanner class, create an object of the class and use any of the available methods found in the Scanner class documentation. In our example, we will use the nextLine() method, which is used to read Strings: If you don't know what a package is, read our Java Packages Tutorial.
It is defined in java.util.Scanner class. The nextLine () method reads the text until the end of the line. After reading the line, it throws the cursor to the next line. The method returns the line that was skipped. It does not accept any parameter. When it does not find any line, then it throws NoSuchElementException.
Ways to convert an InputStream to a String: String result = IOUtils.toString(inputStream, StandardCharsets.UTF_8); String result = CharStreams.toString(new InputStreamReader( inputStream, Charsets.UTF_8)); Scanner s = new Scanner(inputStream).useDelimiter("\\A"); String result = s.hasNext() ? s.next() : ""; Using Stream API (Java 8).
When you're programming in Java, the operator == is generally used for comparing primitive data types (int, double, etc.). If you use == for comparing two object types (like strings), you're comparing them for identity, that is, checking if they reference the same object in memory.
10 lut 2024 · How to Read or Input a String in Java. In Java, we can use Scanner Class or InputStream to Read the string. In below code, we will try to use the Scanner class instance to read the string.
The Scanner class of the java.util package is used to read input data from different sources like input streams, users, files, etc. In this tutorial, we will learn about the Java Scanner and its methods with the help of examples.
A simple text scanner which can parse primitive types and strings using regular expressions. A Scanner breaks its input into tokens using a delimiter pattern, which by default matches whitespace. The resulting tokens may then be converted into values of different types using the various next methods.
