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Tostring(),getstring()method walin wenne mokakda??
- Thread starter amila.ela
- Start date
toString() method eka apita use karanna puluwan object ekak text ekak widiyata represent karanna
EX: apita integer value ekak text ekak widiyata pennanna oni nam
int x=10;
String a=x.toString();
getString() method eka use karanne database table eken result set ekata ganna data retrieve karanna
EX: String a="";
Resultset rs=stmt.executeQuery("query")
while(rs.next())
{
a=rs.getString(1);
}
Retrieves the value of the designated column in the current row of this ResultSet
EX: apita integer value ekak text ekak widiyata pennanna oni nam
int x=10;
String a=x.toString();
getString() method eka use karanne database table eken result set ekata ganna data retrieve karanna
EX: String a="";
Resultset rs=stmt.executeQuery("query")
while(rs.next())
{
a=rs.getString(1);
}
Retrieves the value of the designated column in the current row of this ResultSet
Resultset rs=stmt.executeQuery("query")
while(rs.next())
{
a=rs.getString(1);
System.out.printlin(a); //new line
}
he declared a variable of Resultset Class then named it as rs
next access to all records one by one (used next method for that) by using a loop
and assign them to a string variable.
so the getString() is a method of Resultset class
I saw it's a Java not .NET language.
now use
System.out.printlin(a) to see the result one by one
I guess stmt variable may be declared using the same Class but not sure
I don't know much about Java.
while(rs.next())
{
a=rs.getString(1);
System.out.printlin(a); //new line
}
he declared a variable of Resultset Class then named it as rs
next access to all records one by one (used next method for that) by using a loop
and assign them to a string variable.
so the getString() is a method of Resultset class
I saw it's a Java not .NET language.
now use
System.out.printlin(a) to see the result one by one
I guess stmt variable may be declared using the same Class but not sure
I don't know much about Java.
a=rs.getString(1);
meke [getstring(1)] 1 n wenne mokakkda???
Assuming you are talking about java....
It seems that getString method access an object matrix and the '1' corresponds to the column number of the current row of the object.
To see how this works compile a small program with java and check. I don't have a java compiler with me right now..
it is asking to return the first column of the record retrived by the the database call.a=rs.getString(1);
meke [getstring(1)] 1 n wenne mokakkda???
this is 1 based not 0 based
toString() returns an string representation of an object. if it is a plain object then normally you will get the object ID. for customization you can override this method to return the String you wanted.
