Java: Read from console

Question

I'm don't know how to read from the console in Java. If it's possible I want to do it using a scanner. This is what i tried while learning Java.

package Scanners;

import java.util.Scanner;

public class ConsoleScanner {


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

    public static void main(String[] args){

        if(input.equals("Hello"))
            System.out.println("You typed in: Hello ");
        if(input.equals("Good Bye"))
            System.out.println("You typed in: Good Bye");
        else{
            System.out.println("You typed in: " + input);
        }


    }

}

It give's me this error:

You typed in: java.util.Scanner[delimiters=\p{javaWhitespace}+][position=0][match valid=false][need input=false][source closed=false][skipped=false][group separator=.][decimal separator=\,][positive prefix=][negative prefix=\Q-\E][positive suffix=][negative suffix=][NaN string=\Q?\E][infinity string=\Q?\E]

If there is a better way to read from the console then please post it. - Thanks

Please read a tutorial on IO, [this one](http://docs.oracle.com/javase/tutorial/essential/io/) maybe. — Sotirios Delimanolis, Jan 15 '14 at 18:12
`Scanner#nextLine()` .. Example : `String s = input.nextLine()` — nachokk, Jan 15 '14 at 18:16

score 0 · Answer 1 · answered Jan 15 '14 at 18:12

0

You don't want to print the Scanner itself. You want to call the various Scanner functions to get the input. Have a look at the Scanner API and the Scanner tutorial (which are the first and second results for googling "Java Scanner") for more info.

answered Jan 15 '14 at 18:12

Kevin Workman

39,413
8
61
94

score 0 · Answer 2 · answered Jan 15 '14 at 18:15

Try this:

package Scanners;

import java.util.Scanner;

public class ConsoleScanner {

static Scanner scanner = new Scanner(System.in); //Creates the scanner

public static void main(String[] args){

    String input = scanner.NextLine();  //Sets the string input equal to whatever the user types next

    if(input.equals("Hello"))
        System.out.println("You typed in: Hello ");
    if(input.equals("Good Bye"))
        System.out.println("You typed in: Good Bye");
    else{
        System.out.println("You typed in: " + input);
    }


}

}

score 0 · Answer 3 · answered Jan 15 '14 at 18:20

0

My friend you have to use

Scanner scanner= new Scanner(System.in);
    input = scanner.next();

This method finds and returns the next complete token from this scanner. A complete token is preceded and followed by input that matches the delimiter pattern.

answered Jan 15 '14 at 18:20

Girish

1,667
1
16
28

@Nicken99, is this works for you – Girish Jan 15 '14 at 18:22
@Nicken99, My friend if this works for please right click on the answer, so it will be helpful for others – Girish Jan 15 '14 at 18:25

score -1 · Answer 4 · answered Jan 15 '14 at 18:15

import java.util.Scanner;  
class ScannerDemo{  
 public static void main(String args[]){  

   Scanner sc=new Scanner(System.in);  

   System.out.println("Enter your age");  
   int age=sc.nextInt();  

   System.out.println("age:"+age);  

 }  
}

Java: Read from console

4 Answers4