Solved

date for months

Posted on 2004-09-20
7
251 Views
Last Modified: 2010-03-31
given a month and year as string(say "September 2004"), i want to return an arraylist from 01.09.2004 till 30.09.2004

Thanks
0
Comment
Question by:sangeetha
7 Comments
 
LVL 37

Expert Comment

by:zzynx
ID: 12101174
>> arraylist from 01.09.2004 till 30.09.2004
Do you want an arraylist of Strings or of Dates?
0
 
LVL 2

Author Comment

by:sangeetha
ID: 12101194
i think anything is Ok...

request.setAttribute("dates", getDatum("September", "2004"));

................
................

private static ArrayList getDatum(String month, String year) {
            
            ArrayList list = new ArrayList();
            
                          // What to do here?
            
            return list;
            
      }
am i right?
0
 
LVL 37

Expert Comment

by:zzynx
ID: 12101224
By heart (so not guaranteed without typos):

List arrayList = new ArrayList();


SimpleDateFormat fmt = SimpleDateFormat("dd MMMM yyyy");
Date d = fmt.parse("1 " + month + " " + year);

Calendar cal = Calendar.getInstance();
cal.setTime(d);

boolean stop = false;

int thisMonth = cal.get(Calendar.MONTH);
while (!stop) {
   arrayList.add( cal.getTime() );
   cal.add(Calendar.DATE, 1);
   stop = ( thisMonth!=cal.get(Calendar.MOHTH) )
}

return arrayList;
0
Is Your Active Directory as Secure as You Think?

More than 75% of all records are compromised because of the loss or theft of a privileged credential. Experts have been exploring Active Directory infrastructure to identify key threats and establish best practices for keeping data safe. Attend this month’s webinar to learn more.

 
LVL 35

Accepted Solution

by:
TimYates earned 25 total points
ID: 12101237
   String str = "September 2004" ;
    SimpleDateFormat sdf = new SimpleDateFormat( "MMMMM yyyy" ) ;
    SimpleDateFormat sdf2 = new SimpleDateFormat( "dd.MM.yyyy" ) ;
    sdf.setLenient( true );
    Date month = sdf.parse( str ) ;
    Calendar cal = Calendar.getInstance() ;
    cal.setTime( month );
    int curr = cal.get( Calendar.MONTH ) ;
    int next = curr ;
    ArrayList al = new ArrayList() ;
    while( next == curr )
    {
      al.add( sdf2.format( cal.getTime() ) ) ;
      cal.roll( Calendar.DAY_OF_YEAR, true );
      next = cal.get( Calendar.MONTH ) ;
    }
    for( int i = 0 ; i < al.size() ; i++ )
      System.out.println( al.get( i ) ) ;
0
 
LVL 13

Expert Comment

by:Webstorm
ID: 12101278
Hi sangeetha,


static final String[] month={"january","february","march","april","may","june",
                         "july","august","september","october","november","december"};

private static int getMonth(String s)
{
    for (int i=0;i<month.length;i++)
       if (month[i].equalsIgnoreCase(s)) return i+1;
    return -1;
}

private static int lm(int m,int a)
{
     m=(m+9)%12;
     if (m<11) return 31-((m^(m/5))&1);
     else return ( ((a%4)==0)&&( ((a%100)!=0) || ((a%400)==0) ) )?29:28;
}

private static String len2(int n)
{
     String t="0"+n;
     return t.substring(t.length()-2);
}

private static ArrayList getDatum(String month, String year) {

          int m=getMonth(month);
          if (m<0) return null; // invalid month name

          ArrayList list = new ArrayList();

          int len_month=lm(m,year);
          for (int d=1;d<=len_month;d++)
               list.add(len2(d)+"."+len2(m)+"."+year);
 
          return list;
         
     }
0
 
LVL 13

Expert Comment

by:Webstorm
ID: 12101284
private static ArrayList getDatum(String month, String year) {

should be:

private static ArrayList getDatum(String month, String s_year) {
    int year=Integer.parseInt(s_year);
 
0
 
LVL 37

Expert Comment

by:zzynx
ID: 12101485
Can you tell me what's wrong with my comment?
0

Featured Post

Is Your Active Directory as Secure as You Think?

More than 75% of all records are compromised because of the loss or theft of a privileged credential. Experts have been exploring Active Directory infrastructure to identify key threats and establish best practices for keeping data safe. Attend this month’s webinar to learn more.

Question has a verified solution.

If you are experiencing a similar issue, please ask a related question

Suggested Solutions

Title # Comments Views Activity
Modeling a class in java 5 46
starter POM and spring-boot-starter,  spring-boot-web 2 40
split string containing \r\n in Java 46 38
MySQL  on Tomcat 8 26
For beginner Java programmers or at least those new to the Eclipse IDE, the following tutorial will show some (four) ways in which you can import your Java projects to your Eclipse workbench. Introduction While learning Java can be done with…
Go is an acronym of golang, is a programming language developed Google in 2007. Go is a new language that is mostly in the C family, with significant input from Pascal/Modula/Oberon family. Hence Go arisen as low-level language with fast compilation…
Video by: Michael
Viewers learn about how to reduce the potential repetitiveness of coding in main by developing methods to perform specific tasks for their program. Additionally, objects are introduced for the purpose of learning how to call methods in Java. Define …
Viewers will learn how to properly install Eclipse with the necessary JDK, and will take a look at an introductory Java program. Download Eclipse installation zip file: Extract files from zip file: Download and install JDK 8: Open Eclipse and …

912 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question

Need Help in Real-Time?

Connect with top rated Experts

21 Experts available now in Live!

Get 1:1 Help Now