Java - arrays & loops

Question

Question : Write a Java program to read integer data set(size of n<10) into an array and display its data graphically by plotting each numeric value as a bar of asterisks as shown in the following table.

Element Value Histogram

0 5 *****

1 11 ***********

2 4 ****

3 1 *

4 7 *******

5 10 **********

6 0

7 9 *********

8 12 ************

My work :

My first thought was to do this using a for loop : accessing one element of the array at a time and then printing stars according to the value;

Below is the code, but I don't know how to get the no. of stars printed according the value . Any help on this is highly appreciated. Thanks!

class arrays{

public static void main(String[] args) {

int[] array1 = {5, 11, 4, 1, 7, 10, 0, 9, 12};

int i = 0;

for (int x = array1[i]; i <= 8; i++) {

System.out.print("*");

System.out.println();

}

}

}

1

Answer 1

You have a good start. For the problem, I would use nested for loops: one loop reads the array box by box and prints the array index and the value in that box (just like the example); the second loop prints the stars according to the value in the box.

In the snippet of code above, you would want to move your println() outside of the print loop. That way it will print the stars all on the same line, and move to the next line before printing anything else or ending the program.

If you wanted to jazz up the program, you would let the user input the data and print a custom histogram.

Good luck!