TopazJ Scanner sc=new Scanner(System.in); while(sc.hasNextInt()){ int a=sc.nextInt(); System.out.println(a); }is cleaner, especially if the test cases don't input 3 integers only...
gajapathiraju501 This will also works fine, if we restrict loop for 3 inputs. for(int i=0;i<3;i++){ int a=sc.nextInt();
System.out.println(a); }
Akshansh1903 [deleted]
balavemulakonda can u plz explain how?
sakshichopkar No this isn't working
balavemulakonda import java.util.*;
public class Solution {
public static void main(String[] args) { Scanner scan = new Scanner(System.in); int a = scan.nextInt(); int b = scan.nextInt(); int c =scan.nextInt();
System.out.println(a);System.out.println(b); System.out.println(c); } }
balavemulakonda hope this works out!!once try it
abinayakk88 Actually i tried it but it throws an error
_ErrorCode_ It works fine.
sakshichopkar What if I want to use loop for the same?
balavemulakonda i thnk it works !!i dint try it..u give a trail once
Mr_Swiergiwits My solution was nearly identical to yours however in your solution you force the program to instantiate "a" every time the loop is iterated. This can cause unneeded computation.
mongaretcm System.out.println(a); Then loop over -System.out.println(sc.next()); checking while scanner has next int That worked out just fine
shyam_bipul nice there are more use of this functions to imput max no of value at rum time
chandrashekarga1 maam,could you please explain me how does implementing while loop got worked out in detail
sunvictor The while loop runs if there is another input otherwise it just doesn't run
hasNextInt() checks if the next input is an int so the while loop just checks if there is a next int
kamal10_rk hasNextInt checks for input,then while loop evaluates the hasNextInt if true while is executed.
chandrashekarga1 maam,could you please explain me how does implementing while loop got worked out in detail and also if could explain about how those test cases failed ? what is the reason?
ankit15120 Hi TopazJ! How can i make this Scanner wait for, let say 3 seconds and If no more input till 3 seconds ,the loop ends.
correajunk Just use System.out.println(sc.nextInt());
ketechimelorudo You can make it more simpler by just typing this.
Scanner scan = new Scanner(System.in); while(scan.hasNext()) System.out.println(scan.next());
You are just printing a value not passing it to 'a'
eross8713 // even cleaner Scanner scan = new Scanner(System.in); while(scan.hasNextInt()){ System.out.println(scan.nextInt()); }ketechimelorudo // Even better
public class Solution {
public static void main(String[] args) { Scanner scan = new Scanner(System.in); scan.forEachRemaining(System.out::println); }}
[deleted] i'm just new.. and also like to learn the other coding styles from the others. But just a quick question though.. when i tried your code for Java 8, it worked. However, when i tried it for Java 7.. it gives me error.
this is the Java 7
this is the Java 8
JadedBeast [deleted]
sivadrakshrapu may be you are the god of coding...
balavemulakonda boss!!its Dennis ritche!!!hahah
gaurav_1998 i would like to do it by defining an array and giving it's value.Could u please give me code for that.
Sravya_07 import java.util.*;
public class Solution {
public static void main(String[] args) { Scanner scan = new Scanner(System.in); int[] a= new int[3]; //creating array for (int i=0;i<3;i++) //Assigning values to array from stdin a[i] = scan.nextInt(); scan.close(); for(int j=0;j<3;j++) //Printing array values to stdout System.out.println(a[j]); }}
vivekboi wht is scan.close(); is doing here...i mean the use
hkhanhlam99 scan.close(); is used for closing the scanning or reading other new unneeded inputs .
hkhanhlam99 following this one if you not prefer to do scan.close(); try(Scanner scan= new Scanner(System.in){ content/////// }
rishikeshwar419 how?
kumarswamybade tnq.
itxwaleed import java.util.*;
public class Solution {
public static void main(String[] args) { Scanner scan = new Scanner(System.in); int a = scan.nextInt(); int b = scan.nextInt(); int c =scan.nextInt(); System.out.println(a); System.out.println(b); System.out.println(c); }}
dcpantivirus Thank you, I was searching for working in compiler version)))))
ruchiragahlaut thank u
ashishsinghchau1 It is just showing me the compiler error!
Frantz_B Seems like the shortest solution is the following:
Scanner sc=new Scanner(System.in); while(sc.hasNextInt()){ System.out.println(sc.nextInt()); }
following after @TopazJ. My original grep about it was how would it close because the original challenge didn't ask for this or say something about how to close it with something other than an 'int'. But I guess this is a creative solution.
afshin_hoseini I think for this specific problem a for loop has less overhead process. Isn't it?
aurelius0523 try (Scanner scan = new Scanner(System.in)) { while (scan.hasNext()) { System.out.println(scan.nextInt()); } }
You can do a Try with Resource to automatically close any classes that implements
AutoClosableinterface (Scanner class in this case). That way you don't have to doscanner.close
Tanjib123 import java.util.*; public class Solution { public static void main(String[] args) { Scanner scan = new Scanner(System.in); int a = scan.nextInt(); int b = scan.nextInt(); int c = scan.nextInt(); System.out.println(a+"\n"+b+"\n"+c); } } // This is shorter code!
tanweiyon What is meant by 'new'?
jjatin31 object
bcourtney5965 What it's doing is looking at the "Scanner" class which acts as a blueprint for new instance of the class also known as objects. The new keyword is creating a new object somewhere in memory. Then a reference variable is created that points to that object's location in memory "scan". "scan" is not itself an object, though it's simpler to think of it as such. Lastly it is of type "Scanner", since Scanner is the class it comes from.
(Source) - am a .js engineer, and have been attending a "Learn Java" course all week - the above is what the teacher has drilled into our heads. The teacher was @ Sun Microsystems when they were creating Java - so knows his stuff!
sravya_gunna007 can you please upload that "learn java" link.....
umarbasha007 import java.util.*;
public class Solution {
public static void main(String[] args) { Scanner scan = new Scanner(System.in); int a = scan.nextInt(); int b = scan.nextInt(); intt c = scan.nextInt(); //Print int values in single line code System.out.printf("%d\n%d\n%d\n",a,b,c); }}
ajaykumar_bit_11 try this out.
import java.util.*;
public class Solution {
public static void main(String[] args) { Scanner scan = new Scanner(System.in); int i; int a = scan.nextInt(); int b = scan.nextInt(); int c = scan.nextInt(); System.out.println(a); System.out.println(b); System.out.println(c); }}
coderboy_ [deleted]
MARVELMafia Heres mine. Hope it helps!
import java.util.*; public class Solution { public static void main(String[] args) { Scanner scan = new Scanner(System.in); for(int i=0;i<3;i++) { int a=scan.nextInt(); System.out.println(a); } scan.close(); } }
zibibednarek Had the same Idea, than I tohught about using arrays, as it would be easier to modify number of integers we would like to input and than printout to console.
System.out.println("Input integers"); Scanner readIntegers = new Scanner(System.in); int[] Integers; Integers = new int[3]; for(int i=0; i<3 ; i++){ Integers [i] = readIntegers.nextInt(); } readIntegers.close(); //It's not necessary, as the input Loop is set to run 3 times only System.out.println("Output integers"); for(int i=0 ; i<3 ; i ++){ System.out.println(Integers[i]); }MARVELMafia Yeah pretty much the same thing. The only difference is that yours requires a longer compilation time. :)
maulid_diansyah its great
tipsycodergirl No need to store in variable as we are not processing them.
Scanner sc = new Scanner(System.in); for(int i=0; i<3; i++){ System.out.println(sc.nextInt()); }sciencenerd1609 yes but in this code it will ask for input and print it in the next line and then ask for 2nd value ..the objective is to input 3 values and print them in separate lines together ..
sohamghorpade18 why do we include * in packages??
ex. java.io.*;
igoorderke "*" symbol adds all the classes from the package. instead of typing out all the classes in java.io package we can add a star, which is not very efficient if you write a small program, sometimes it is better to add single class. EX: java.io.FileReader java.io.FileWriter
naveen_km24 Scanner scan = new Scanner(System.in); while(scan.hasNextInt()){ System.out.println(scan.next()); } scan.close(); // Remember to close the scanner after you are done using it.
Stelios10 Solution using java8 and streams for speed:
------solution------------
import java.util.; import java.io.;
public class Solution {
public static void main(String[] args) { try (BufferedReader br = new BufferedReader( new InputStreamReader(System.in))) { br.lines().forEach(System.out::println); } catch (IOException ioe) { ; } }}
jcwilliamson98 Thank you for the example using buffered reader, could you explain what .forEach(System.out::println); does?
shubh42015 import java.util.*;
public class Solution {
public static void main(String[] args) { Scanner scan = new Scanner(System.in); int i =0; while(i<3){ System.out.println(scan.nextInt()); i++; } }}
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