GETTING INPUT

SCENARIO 1B

GETTING n DATA ON n SEPARATE LINES (n is determined at run-time)

This is a common situation. Often, the first line of entry is the amount of data that has to be read in.

SAMPLE INPUT 1

4

2

9

5

3

SAMPLE INPUT 2

3

Book

Table

Desk

SAMPLE INPUT 3

0

Here is are a few examples:

EXAMPLE 1

Below is an example where the first number entered represents how much data there will be. It is very similar to Example 2 from the previous section with only the 2^nd line in the main function being different.

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();

}

//process the data array here

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

}

And here is another example where we deal with two types of data.

EXAMPLE 2

Below is an example where the user inputs the integer value of n representing the amount of line in the data. Then, there are n lines of data that are words (Strings) that have to be read.

We are dealing with two types of data (int and String). So we have to avoid using scr.nextLine(). But we can still use scr.next() to read String.

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(); //cannot use nextLine() here

}

//process the data array here

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

}