There are mainly five different ways to take input from user in java using keyboard.
2. BufferedReader and InputStreamReader Class
3. DataInputStream Class
4. Console Class
5. Scanner Class
Below I have shared example for each of them.
How to Take Input from User in Java
Command Line Arguments
It is one of the simplest way to read values from user. It will work only when you are running the program from command line.
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class CLAExample { public static void main(String...s) { System.out.println(s[0]+" "+s[1]); } } |
BufferedReader and InputStreamReader Class
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import java.io.BufferedReader; import java.io.InputStreamReader; class BufferedReaderExample { public static void main(String...s) throws Exception{ InputStreamReader isr = new InputStreamReader(System.in); BufferedReader br = new BufferedReader(isr); System.out.println("Enter a value:"); String str = br.readLine(); System.out.println(str); } } |
DataInputStream Class
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import java.io.DataInputStream; class DataInputStreamExample { public static void main(String...s) throws Exception{ DataInputStream dis = new DataInputStream(System.in); System.out.println("Enter a value:"); String str = dis.readLine(); System.out.println(str); } } |
Console Class
It will work only when you are running the program from command line.
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import java.io.Console; class ConsoleExample { public static void main(String...s){ Console c = System.console(); System.out.println("Enter a value:"); String str = c.readLine(); System.out.println(str); } } |
Scanner Class
One of the most commonly used way to read from keyboard.
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import java.util.Scanner; class ScannerExample { public static void main(String...s){ Scanner sc = new Scanner(System.in); System.out.println("Enter a value:"); String str = sc.nextLine(); System.out.println(str); } } |
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Happy Coding!! 🙂 🙂
