Getting the lastday of previous month

[ruds]

hi,
I want to get the last day of previous month.
i have tried using GregorianCalendar;
Calendar cal = new GregorianCalendar(year1, lastmonth, 1);

// Get the number of days in that month
cal.set(Calendar.MONTH, lastmonth);
//cal.set(Calendar.DAY_OF_MONTH, cal.get(Calendar.DAY_OF_MONTH)-1);
int days = cal.getActualMaximum(cal.DAY_OF_MONTH);
System.out.println("max = "+days);
String
lastdate=String.valueOf(cal.getActualMaximum(cal.DAY_OF_MONTH));
but still I get the lastdate for current month (31) and not for last
month(30).
Please tell me what to do?

 

[Jens Seiler]

hi,
I want to get the last day of previous month.
[...]
Please tell me what to do?

Set your calendar instance to the first day of the *current* month and
substract one day?

Greetings,

Jens Seiler

 

[shakah]

hi,
I want to get the last day of previous month.
i have tried using GregorianCalendar;
Calendar cal = new GregorianCalendar(year1, lastmonth, 1);

// Get the number of days in that month
cal.set(Calendar.MONTH, lastmonth);
//cal.set(Calendar.DAY_OF_MONTH, cal.get(Calendar.DAY_OF_MONTH)-1);
int days = cal.getActualMaximum(cal.DAY_OF_MONTH);
System.out.println("max = "+days);
String
lastdate=String.valueOf(cal.getActualMaximum(cal.DAY_OF_MONTH));
but still I get the lastdate for current month (31) and not for last
month(30).
Please tell me what to do?

Take a look at the "add(...)" method in java.util.Calendar, it might
be what your're looking for:
http://java.sun.com/j2se/1.4.2/docs/api/java/util/Calendar.html

For example:
jim@sarah:/tmp$ cat lastday.java
public class lastday {
static public void main(String [] args) {
java.util.Calendar c = java.util.Calendar.getInstance() ;
c.set(java.util.Calendar.DAY_OF_MONTH, 1) ;
c.add(java.util.Calendar.DAY_OF_MONTH, -1) ;

System.out.println(java.text.DateFormat.getDateInstance().format(c.getTime())) ;
}
}

jim@sarah:/tmp$ /usr/bin/jdk1.5.0_09/bin/javac lastday.java

jim@sarah:/tmp$ /usr/bin/jdk1.5.0_09/bin/java lastday
Jun 30, 2008

 

[ruds]

Take a look at the "add(...)" method in java.util.Calendar, it might

be what your're looking for:
 http://java.sun.com/j2se/1.4.2/docs/api/java/util/Calendar.html

For example:
jim@sarah:/tmp$ cat lastday.java
public class lastday {
  static public void main(String [] args) {
    java.util.Calendar c = java.util.Calendar.getInstance() ;
    c.set(java.util.Calendar.DAY_OF_MONTH, 1) ;
    c.add(java.util.Calendar.DAY_OF_MONTH, -1) ;

System.out.println(java.text.DateFormat.getDateInstance().format(c.getTime(­))) ;
  }

}

jim@sarah:/tmp$ /usr/bin/jdk1.5.0_09/bin/javac lastday.java

jim@sarah:/tmp$ /usr/bin/jdk1.5.0_09/bin/java lastday
Jun 30, 2008

this will give me only for 30th of month or 29th if current month has
30 days,
I want to use it every month without making changes to it.

 

[ruds]

Take a look at the "add(...)" method in java.util.Calendar, it might

be what your're looking for:
 http://java.sun.com/j2se/1.4.2/docs/api/java/util/Calendar.html

For example:
jim@sarah:/tmp$ cat lastday.java
public class lastday {
  static public void main(String [] args) {
    java.util.Calendar c = java.util.Calendar.getInstance() ;
    c.set(java.util.Calendar.DAY_OF_MONTH, 1) ;
    c.add(java.util.Calendar.DAY_OF_MONTH, -1) ;

System.out.println(java.text.DateFormat.getDateInstance().format(c.getTime(­))) ;
  }

}

jim@sarah:/tmp$ /usr/bin/jdk1.5.0_09/bin/javac lastday.java

jim@sarah:/tmp$ /usr/bin/jdk1.5.0_09/bin/java lastday
Jun 30, 2008

Its not working for me...
java.util.Calendar c = java.util.Calendar.getInstance() ;
c.set(java.util.Calendar.DAY_OF_MONTH, 1) ;
c.add(java.util.Calendar.DAY_OF_MONTH, -1) ;
int days =Integer.valueOf(c.add(java.util.Calendar.DAY_OF_MONTH, -1));

gives error...
'void' type not allowed here .... for 'c.add....'

 

[ruds]

Take a look at the "add(...)" method in java.util.Calendar, it might
be what your're looking for:
 http://java.sun.com/j2se/1.4.2/docs/api/java/util/Calendar.html
For example:
jim@sarah:/tmp$ cat lastday.java
public class lastday {
  static public void main(String [] args) {
    java.util.Calendar c = java.util.Calendar.getInstance() ;
    c.set(java.util.Calendar.DAY_OF_MONTH, 1) ;
    c.add(java.util.Calendar.DAY_OF_MONTH, -1) ;
System.out.println(java.text.DateFormat.getDateInstance().format(c.getTime(­­))) ;
  }
}
jim@sarah:/tmp$ /usr/bin/jdk1.5.0_09/bin/javac lastday.java
jim@sarah:/tmp$ /usr/bin/jdk1.5.0_09/bin/java lastday
Jun 30, 2008

Its not working for me...
java.util.Calendar c = java.util.Calendar.getInstance() ;
c.set(java.util.Calendar.DAY_OF_MONTH, 1) ;
c.add(java.util.Calendar.DAY_OF_MONTH, -1) ;
int days =Integer.valueOf(c.add(java.util.Calendar.DAY_OF_MONTH, -1));

gives error...
'void' type not allowed here .... for 'c.add....'

Of course.  Did you notice that Calendar#add() does not return a value?  What
did you imagine you were passing to the 'valueOf()' method?

Also, you invoked add() twice.  Once before the the valueOf(), and once
(incorrectly) inside it.

Read the Javadocs on java.util.Calendar to find out how to retrieve values
from it.  'add()' is not one of the ways.

Thanks Shakah and Lew,
I got that point correct.

Sorry,
did'nt read the example properly.
Thanks.