How to use scanner in java?

Question

import java.util.Scanner;  

public class Initials {  
    Scanner getin = new Scanner (System.in);  
    public static void main(String[] args) {  
        String Name;  
        System.out.println("Enter your name's Initials::");  
        Name=getin.nexlinet();  
    }  
}

error : non-static variable cannot be referenced from a static context?

Answer 1

First of all, Scanner objects doesn't hava a method called nexlinet, I guess you want nextLine() instead.

About the error, you can't reference a non-static variable from a static method (in this case, that method is main).

Why? Because static variables can be used even if no instances of the class have been created.

How to solve it?

• You can declare the variable getin as static:

  static Scanner getin = new Scanner(System.in);
  

• Or you can create an instance of the class and access to the instance field getin:

  Initials some_name = new Initials();
  // ...
  name = t.getin.nextLine();
  

Notes:

• Try to follow Java naming conventions. Use 'mixedCase' for methods/variables and use 'CamelCase' for classes/interfaces.
• I'd recommend you to read about access modifiers. Why? Look at the second solving way. The class Initials should provide a getter/setter method for the instance field getin, so you don't have full access on it. Also, it's a good practice to declare instance fields as private (and use getters/setters).

Answer 2

try this:

// ur code
    public static void main(String[] args) { 
        Scanner getin = new Scanner (System.in); // <-- move scanner declaration inside main
        Name=getin.nextLine();  // <-- note this change also
// ur code

Answer 3

you have to create scanner class object inside main method.

because outside declared non static variable cant accessed into static methods.

public static void main(String[] args) 
{  
    Scanner getin = new Scanner (System.in);  
    String Name;  
    System.out.println("Enter your name's Initials::");  
    Name=getin.nextLine();  
}  

Answer 4

you are not aware of static and non-static variables or methods.

1. static variable or method can be accessed any where whether it is static or non-static method.
2. non-static method or variable cannot be accessed in static methods.

so modified code should be :

import java.util.Scanner;  

public class Initials {  

    public static void main(String[] args) {  

        Scanner getin = new Scanner (System.in);    
        System.out.println("Enter your name's Initials: ");  
        String Name = getin.nextLine();  
    }  
}

otherwise modify Scanner tostatic Scanner getin = new Scanner (System.in);

Answer 5

Static methods: Cannot access non static variables. Cannot invoke non static methods. Cannot use "this" keyword. Cannot use "super" keyword. Cannot override static methods. so you can't access non static objects inside of the main method because its a static method.

Answer 6

import java.util.Scanner;  

public class Initials 
{  
    public static void main(String[] args) 
   {  
        Scanner getin = new Scanner (System.in);  

        String Name;  
        System.out.println("Enter your name's Initials::");  
        Name=getin.nexlinet();  
    }  
}

Answer 7

import java.util.Scanner;

public class Initials {

public static void main(String[] args) { 
     Scanner getin = new Scanner (System.in);  
    String Name;  
    System.out.println("Enter your name's Initials::");  
    Name=getin.next();  
}  

}