Java RSS Java RSS

printing a table, please help

Please support our Java advertiser: Programming Forums - DaniWeb Sister Site
Reply

•
•
Join Date: Sep 2009
Posts: 30
Reputation: shroomiin is an unknown quantity at this point 
Solved Threads: 0
shroomiin shroomiin is offline Offline
Light Poster

printing a table, please help

 
0
  #1
Oct 30th, 2009
hello everyone, i am trying to write a code that displays a table with 75 years. each year has to display the world population and the projected population for the following years after that by multiplying the current population by the yearly growth (1.17) but i am running into some issues. first of all, the current population happens to be 6,816,330,827. but when i try to assign a variable to that it says that it is out of range. whyy is this? also i am not sure how and where to put the values for population. this is what i have so far, just the years column 1-75. where would i go from here?

Java Syntax (Toggle Plain Text) 
  1.  
  2. public class WorldPopulation {
  3.  
  4. 	public static void main(String[] args) {
  5.  
  6.  
  7. 		int pop ;
  8. 		double growth=1.17;
  9. 		{System.out.println("Years     " + "Population     " + "Increase     ");
  10.  
  11. 		for (int year=1; year<=75; year++)
  12. 		System.out.println(year);
  13.  
  14.  
  15.  
  16.  
  17. 	}
  18.  
  19. }
  20. }
Reply With Quote Quick reply to this message  
•
•
Join Date: May 2007
Posts: 4,484
Reputation: Ezzaral has much to be proud of Ezzaral has much to be proud of Ezzaral has much to be proud of Ezzaral has much to be proud of Ezzaral has much to be proud of Ezzaral has much to be proud of Ezzaral has much to be proud of Ezzaral has much to be proud of Ezzaral has much to be proud of Ezzaral has much to be proud of 
Solved Threads: 517
Moderator
Featured Poster
Ezzaral's Avatar
Ezzaral Ezzaral is offline Offline
Industrious Poster
 
0
  #2
Oct 30th, 2009
The max value for int is 2147483647, so you will need to use long for that value.
Last edited by Ezzaral; Oct 30th, 2009 at 5:26 pm.
Reply With Quote Quick reply to this message  
•
•
Join Date: Sep 2009
Posts: 30
Reputation: shroomiin is an unknown quantity at this point 
Solved Threads: 0
shroomiin shroomiin is offline Offline
Light Poster
 
0
  #3
Oct 30th, 2009
how do i use long??? no matter what i do it keeps giving me errors "token long is an invalid expression"
Reply With Quote Quick reply to this message  
•
•
Join Date: May 2007
Posts: 4,484
Reputation: Ezzaral has much to be proud of Ezzaral has much to be proud of Ezzaral has much to be proud of Ezzaral has much to be proud of Ezzaral has much to be proud of Ezzaral has much to be proud of Ezzaral has much to be proud of Ezzaral has much to be proud of Ezzaral has much to be proud of Ezzaral has much to be proud of 
Solved Threads: 517
Moderator
Featured Poster
Ezzaral's Avatar
Ezzaral Ezzaral is offline Offline
Industrious Poster
 
0
  #4
Oct 30th, 2009
Java Syntax (Toggle Plain Text) 
  1. long pop = 6816330827;
Long is just another primitive data type.
Reply With Quote Quick reply to this message  
•
•
Join Date: Sep 2009
Posts: 30
Reputation: shroomiin is an unknown quantity at this point 
Solved Threads: 0
shroomiin shroomiin is offline Offline
Light Poster
 
0
  #5
Oct 30th, 2009
alright thanks! i know i am asking a lot here but i am getting closer. my code and its output are below, but how would i get the population to appear next to the year values, and also get it to repeat all the way down to 75?

Java Syntax (Toggle Plain Text) 
  1. public class WorldPopulation {
  2.  
  3. 	public static void main(String[] args) {
  4.  
  5. 		long pop=6816330827L;
  6. 		long population;
  7. 		double rate=1.17;
  8. 		{System.out.printf("%s%20s\n", "Year", "Population");
  9.  
  10. 		for (int year=1; year<=75; year++)
  11.  
  12. 			System.out.println(year);
  13.  
  14.  
  15. 		population = (long)(pop*rate);
  16.  
  17. 			System.out.println(population);
  18.  
  19.  
  20.  
  21. 		}
  22.  
  23.  
  24. 	}
  25.  
  26. }

output:

Year Population
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
7975107067



as you can see, its showing up at the bottom.
Reply With Quote Quick reply to this message  
•
•
Join Date: May 2007
Posts: 4,484
Reputation: Ezzaral has much to be proud of Ezzaral has much to be proud of Ezzaral has much to be proud of Ezzaral has much to be proud of Ezzaral has much to be proud of Ezzaral has much to be proud of Ezzaral has much to be proud of Ezzaral has much to be proud of Ezzaral has much to be proud of Ezzaral has much to be proud of 
Solved Threads: 517
Moderator
Featured Poster
Ezzaral's Avatar
Ezzaral Ezzaral is offline Offline
Industrious Poster
 
0
  #6
Oct 30th, 2009
Concatenate the string you want to print
Java Syntax (Toggle Plain Text) 
  1. println(year + " " + population)
or use printf.
Reply With Quote Quick reply to this message  
Reply

Quick Reply to Thread
•
•
•
•
•
•
•
•
Message:
•
•
•
•



Other Threads in the Java Forum
Thread Tools Search this Thread



2dgraphics account android api apple applet application array arrays automation banking binary binarytree bluetooth chat chatprogramusingobjects class classes client code component data database derby design draw eclipse encryption error event exception fractal game givemetehcodez graphics gui html ide if_statement image inheritance input integer interface j2me java javadesktopapplications javaprojects jlabel jni jpanel jtextfield julia linux list loop map method methods midlethttpconnection mobile monitoring netbeans newbie nullpointerexception open-source oracle print printing problem program programming project property recursion reference ria scanner screen search server set size sms sort sourcelabs splash sql static stop string swing testautomation threads time tree ui unicode validation windows
About Us | Contact Us | Advertise | DaniWeb | Acceptable Use Policy | RSS Feed

©2003 - 2009 DaniWeb® LLC