August 22, 2006

The following code shows you how to simulate the “ping” command with the J2SE Tiger InetAddress.isReachable method. import java.io.*;import java.net.*;public class reachable{ public static void main(String args[]) { String[] addrs= {“www.java.sun.com”,”www.yahoo.com”,”www.google.com”}; try{ for(int i=0;i

You know that you can extract constructors, methods, and variables from a Java class file. Generally, when you use Field fields[] = c.getDeclaredFields( ); where c is initialized using Class c = Class.forName(className); and print the fields array, you get all the elements declared in the class. However, suppose you

Instead of copying DataRow column by column, the following code copies data in one line from the source to the destination row: DataTable dtDest = new DataTable();dtDest = dsActivity.Tables[0].Clone();foreach(DataRow dr in dsSrc.Tables[0].Rows){ DataRow newRow = dtDest .NewRow(); newRow.ItemArray = dr.ItemArray; dtDest.Rows.Add(newRow);} Note: The ImportRow method does the same thing, except

This PHP function pulls a single field from a single record in the database once the MySQL connection has already been established: function getField($field, $tbl_name, $condition = 1){ $result = mysql_query(“SELECT $field FROM $tbl_name WHERE $condition”); return @mysql_result($result, 0);}$myValue = getField(“fieldName”,”myTable”,”id = ” . $uniqueID);

String streams allow reading and writing strings just like cin and cout allow reading standard input and writing standard output. String streams may be used by including . Reading from a string is similar to reading input using cin: string s = “word 5”;istringstream iss(s);string w;int n;iss >> w >>