How to read a character in java

Java provides methods for reading single characters, including: nextChar() method: read Unicode code points from the Scanner object; read() method: read Unicode code points from the Reader object; next() method : Read a character from the Scanner object and return a string; hasNext() and nextLine() methods: Check whether there is the next character or read a line.

Reading a single character in Java

Java provides a variety of methods to read a single character:

1. nextChar() method

This method reads the next character from the Scanner object. It returns a int value representing the character's Unicode code point.

Scanner scanner = new Scanner(System.in);
int ch = scanner.nextChar();

2. read() method

This method reads a single character from the Reader object. It returns a int value, or -1 when the end of file is reached.

BufferedReader reader = new BufferedReader(new FileReader("file.txt"));
int ch = reader.read();

3. next method

This method reads the next character from the Scanner object and converts it into a space-separated string , which is then returned as String.

Scanner scanner = new Scanner(System.in);
String ch = scanner.next();

4. hasNext() and nextLine() methods

hasNext() method checks whether there is the next character in the input, and nextLine() The method reads and returns the next line of input, including newlines.

For reading characters one by one, the nextChar() and read() methods are more efficient because they return characters directly, while other methods require additional processing.

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