USSD menu termination value

Unstructured Supplementary Service Data (USSD) menu designing is more considerable. Since, having issues will lead the USSD server to unstable status.

while submitting menu to mobile, these parameter values must be used.

17 - mobile created session termination 
2 - application session creation
3 - application session termination 

Remove log files created by log4j

Add following code segment to configure file in log4j.

log4j.appender.R=org.apache.log4j.RollingFileAppender
log4j.appender.R.File=example.log
log4j.appender.R.MaxFileSize=100KB
log4j.appender.R.MaxBackupIndex=7
log4j.appender.R.layout=org.apache.log4j.PatternLayout
log4j.appender.R.layout.ConversionPattern=%p %t %c - %m%n

MaxBackupIndex will hold maximum number of 7 files in the location that files are created.

Wireshark packet filtering

Wireshark is a tool for packet filtering in network adapter.

Use following steps to capture packets in Wireshark.

1) Start network interface for capturing for Wireshark Capture/Interfaces
2) Enter filtering in Wireshark filtering option under menu bar

    Ex :- ip.addr==192.172.145.26
    Above is a filtering packets for ip "192.172.145.26"

3) Right-click on a packet and Follow TCP stream. This gives packet contents.

This is a code that can be used to get birth day from National Identity Card in Sri Lanka.  

public Calendar getBirthDate(String nic) {
        int date = Integer.valueOf(nic.substring(2, 5));
        int bdate = 0;
        int bmonth = 0;
        int byear = Integer.valueOf(nic.substring(0, 2));
        if (date > 500) {
            date = date - 500;
        }
        if (date <= 31) {
            bdate = date;
            bmonth = 1;
        }
        if (31 < date & date <= 60) {
            bdate = date - 31;
            bmonth = 2;
        }
        if (60 < date & date <= 91) {
            bdate = date - 60;
            bmonth = 3;
        }
        if (91 < date & date <= 121) {
            bdate = date - 91;
            bmonth = 4;
        }
        if (121 < date & date <= 152) {
            bdate = date - 121;
            bmonth = 5;
        }
        if (152 < date & date <= 182) {
            bdate = date - 152;
            bmonth = 6;
        }
        if (182 < date & date <= 213) {
            bdate = date - 182;
            bmonth = 7;
        }
        if (213 < date & date <= 244) {
            bdate = date - 213;
            bmonth = 8;
        }
        if (244 < date & date <= 274) {
            bdate = date - 244;
            bmonth = 9;
        }
        if (274 < date & date <= 305) {
            bdate = date - 274;
            bmonth = 10;
        }
        if (305 < date & date <= 335) {
            bdate = date - 305;
            bmonth = 11;
        }
        if (335 < date & date <= 366) {
            bdate = date - 335;
            bmonth = 12;
        }
        Calendar calendar = Calendar.getInstance();
        calendar.clear();
        byear = getYear(byear);
        calendar.set(Calendar.YEAR, byear);
        calendar.set(Calendar.MONTH, bmonth);
        calendar.set(Calendar.DATE, bdate);
        return calendar;
    }

Calculate age in java

Use following code to calculate the age in java. Input parameter is calendar which contains b'day year, month, day.

public int calculateAge(Calendar bcalendar) {
        Calendar today = Calendar.getInstance();
        int age = today.get(Calendar.YEAR) - bcalendar.get(Calendar.YEAR);
        if (today.get(Calendar.DAY_OF_YEAR) < bcalendar.get(Calendar.DAY_OF_YEAR)) {
            age--;
        }
        return age;
}

Leaf year in java

Following code can be used to find Leaf Year in java.

public boolean isLeafYear(int year) {
        boolean leaf = false;
        if (year < 100) {
            if (year > 40) {
                year = year + 1900;
            } else {
                year = year + 2000;
            }
        }
        if (year % 4 == 0) {
            if (year % 100 != 0) {
                leaf = true;
            } else if (year % 400 == 0) {
                leaf = true;
            }
        }
        return leaf;
    }