GETTING INPUT

SCENARIO 2B
GETTING n DATA SPACE DELIMITED ON A SINGLE LINE (n is determined at run-time)

This is a common enough scenario found on the CCC. Thankfully, it is very easy to deal with in Java.

SAMPLE INPUT 1

5 4 1 0 4 5

SAMPLE INPUT 2

3 dog cat mouse

Here are a few examples:

EXAMPLE 1 – INTEGERS

Below is an example where the program has to handle many numbers separated by a space on a single line. The first number states how many other numbers there are in the line.

import java.util.Arrays;

import java.util.Scanner;

public class InputBasics

{

public static void main(String[] args)

{

Scanner scr = new Scanner(System.in);

int n = scr.nextInt();

int[] data = new int[n];

for (int i=0; i<n; i++)

{

data[i] = scr.nextInt(); //read next String in the stream

}

//process the data array here

System.out.println(Arrays.toString(data));

}

}

SAMPLE EXECUTION

4 10 20 30 40

[10, 20, 30, 40]

Here is another example mixing int and String inputs.

EXAMPLE 2 – AN INTEGER FOLLOWED BY STRINGS

The program below deals with input that start with an integer for the value of n. Then, there are n Strings on the same line all separated by a space.

import java.util.Arrays;

import java.util.Scanner;

public class InputBasics

{

public static void main(String[] args)

{

Scanner scr = new Scanner(System.in);

int n = scr.nextInt();

String[] data = new String[n];

for (int i=0; i<n; i++)

{

data[i] = scr.next(); //read next String in the stream

}

//process the data array here

System.out.println(Arrays.toString(data));

}

}

SAMPLE EXECUTION

5 blue yellow green red orange

[blue, yellow, green, red, orange]