Handling inputs via scanner class
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The Scanner class in Java allows user input through methods like nextInt(), nextFloat(), and nextLine(). It is located in the java.util package. A Scanner object is created, passing System.in, and then various next methods are used to input integers, floats, strings and other data from the user.
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![import java.util.Scanner;
class GetInput {
public static void main(String args[]) {
int a;
Scanner in = new Scanner(System.in);
System.out.println("Enter an integer");
a = in.nextInt();
System.out.println("You entered integer "+a);
} }](https://image.slidesharecdn.com/handlinginputsviascannerclass-141113091449-conversion-gate02/85/Handling-inputs-via-scanner-class-3-320.jpg)
![import java.util.Scanner;
class GetInput {
public static void main(String args[]) {
float b;
Scanner in = new Scanner(System.in);
System.out.println("Enter a float");
b = in.nextFloat();
System.out.println("You entered float "+b);
} }](https://image.slidesharecdn.com/handlinginputsviascannerclass-141113091449-conversion-gate02/85/Handling-inputs-via-scanner-class-4-320.jpg)
![import java.util.Scanner;
class GetInput {
public static void main(String args[]) {
String s;
Scanner in = new Scanner(System.in);
System.out.println("Enter a string");
s = in.nextLine();
System.out.println("You entered string"+s);
} }](https://image.slidesharecdn.com/handlinginputsviascannerclass-141113091449-conversion-gate02/85/Handling-inputs-via-scanner-class-5-320.jpg)
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Handling inputs via scanner class
- 1. •Scanner class is one of the class of Java which provides the methods to get inputs. •Scanner class is present in java.util package so we import this package in our program. •We first create an object of Scanner class and then we use the methods of Scanner class.
- 2. Scanner a = new Scanner(System.in); Following are methods of Scanner class: •next( ) to input a string •nextByte() to input a byte value •nextInt( ) to input an integer •nextFloat( ) to input a float •nextLong( ) for Long Values •nextDouble() for double values
- 3. import java.util.Scanner; class GetInput { public static void main(String args[]) { int a; Scanner in = new Scanner(System.in); System.out.println("Enter an integer"); a = in.nextInt(); System.out.println("You entered integer "+a); } }
- 4. import java.util.Scanner; class GetInput { public static void main(String args[]) { float b; Scanner in = new Scanner(System.in); System.out.println("Enter a float"); b = in.nextFloat(); System.out.println("You entered float "+b); } }
- 5. import java.util.Scanner; class GetInput { public static void main(String args[]) { String s; Scanner in = new Scanner(System.in); System.out.println("Enter a string"); s = in.nextLine(); System.out.println("You entered string"+s); } }