combining two 1d arrays into a 2d array?

Question

I am trying to possibly get this program to print out as.

Smith 1000 doe 1200 john 1400 bailey 900 potter 1600

the program itself has to arrays I either need to find out a way of possibly combining the two 1d arrays or just a way to format it correctly so it prints out in the above way.

The Program:

import java.util.*; public class TwoArrays { static Scanner console = new Scanner(System.in); public static void main(String[]args){ String [] name = new String[5]; int [] vote = new int[5]; String lastname; int votecount; int i; for(i=0; i<name.length; i++){ System.out.println("Enter the last name of the candidate: "); lastname = console.next(); name[i]= lastname; System.out.println("Enter the number of votes the candidate got: "); votecount = console.nextInt(); vote[i] = votecount; } String printing = Print(name); int printing2 = Print2(vote); } public static String Print(String [] pname){ for (int i=0; i<pname.length; i++){ System.out.println(pname[i]+ " \n"); } return "nothing"; } public static int Print2(int [] pvote){ for (int i=0; i<pvote.length; i++){ System.out.println(pvote[i]+ " \n"); } return 0; } }

Use a hash map where the name is the key, and the votes are the value — turbo
– turbo, Commented Dec 10, 2013 at 15:56

Masudul · Accepted Answer · 2013-12-10 16:22:28Z

For that you need set reasonable spaces using System.out.printf. Here I put %-15s for left alignment. You can easily calculate it form pname sizes.

 public static void print(String[] pname, int[] pvote) { for (int i = 0; i < pname.length; i++) { System.out.printf("%-15s %d\n", pname[i], pvote[i]); } }

Tim B · Accepted Answer · 2013-12-10 15:58:07Z

0

for (int i=0;i<pname.length;i++) { System.out.println(pname[i]+ " "+pvote[i]); }

answered Dec 10, 2013 at 15:58

Tim B

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2 Comments

Floris Over a year ago

I would prefer to use a tab so the numbers align as requested in the example. Or print the name in a fixed-width field.

Tim B Over a year ago

Yes, that would be tidier. I only used fixed width because that was what was in the existing code.

turbo · Accepted Answer · 2013-12-10 16:11:37Z

Add this as an instance variable:

HashMap<String, Integer> candidateMap = new HashMap<String, Integer>();

Then in your loop:

System.out.println("Enter the last name of the candidate: "); lastname = console.next(); System.out.println("Enter the number of votes the candidate got: "); votecount = console.nextInt(); candidateMap = candidateMap.put(lastname, votecount);

Then your print method (credit to @Masud for proper print formatting):

public static void Print(){ for (String candidate : candidateMap.keySet()){ System.out.printf("%-15s %d\n", candidate, candidateMap.get(candidate)); } }

@Masud you're right. hope you don't mind if I use what you have in your answer with proper credit.

Floris · Accepted Answer · 2013-12-10 16:27:04Z

"just a way to format it correctly so it prints out in the above way.":

 public static void Print(String [] pname, int [] votes){ for (int i=0; i<pname.length; i++){ System.out.printf("%-10s %5d\n", pname[i], votes[i]); } }

Then obvious call it just once, with both arrays as arguments:

Print(name, vote);

(with latest edit, you get some nice alignment. The name is left aligned in a field of 10, the number is right aligned in a field of width 5. You can add other characters in between (for example, a :) just by inserting it into the format string.)

I tried this it did not work correctly first off if it is a void the return can't be there and when I went to call 'Print(name, vote)' nothing ended up printing
Sorry - your comment was truncated. What is the error you are getting? I thought that return with nothing is valid as the end of a void function... And this looks remarkably similar to @Masud's code - is that not working for you either?

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