Re: [ vuZs.net ] CS506 Answer

Thanks for guidance 

On Sun, May 20, 2012 at 6:44 PM, Zubair Hussain <zubair@vuzs.net> wrote:

Dear Umair, 

Your codes are not right on target in question  following things are asked which are not in your codes.

database type name of second column 

Here are the right codes. I tried my best to be on target. I wrote my comments in green to clear the logic.

ResultSet rs = stmt.executeQuery("SELECT * FROM TABLE2");

     ResultSetMetaData rsmd = rs.getMetaData();

String secondColName ;  // creat a varible to hold name of filed

secondColName = rsmd.getColumnName(2); // getColumnName(2) method will extract 2nd column name

System.out.println(secondColName); // display name of 2nd column.

int columnType; // variable to hold the value of columntype

columnType = rsmd.GetColumnType(2);// This method returns the underlying database type, rather than a FieldType

Regards

Zubair Hussain

www.vuzs.net

On Sun, May 20, 2012 at 2:44 PM, Umair Saulat <saulat.umair@googlemail.com> wrote:

Thanks Bhai 

Please confirm the answer is true:

Write down the code for a method of ResultMetaData object (rs) to return the database type name of second column

Solution 

An object that can be used to get information about the types and properties of the columns in a ResultSet object. The following code fragment creates the ResultSet object rs, creates the ResultSetMetaData object rsmd, and uses rsmd to find out how many columns rs has and whether the first column in rs can be used in a WHERE clause.

 

ResultSet rs = stmt.executeQuery("SELECT a, b, c FROM TABLE2");

     ResultSetMetaData rsmd = rs.getMetaData();

     int numberOfColumns = rsmd.getColumnCount();

     boolean b = rsmd.isSearchable(1);

 

Ref: http://docs.oracle.com/javase/1.4.2/docs/api/java/sql/ResultSetMetaData.html

On Sun, May 20, 2012 at 1:19 PM, Zubair Hussain <zubair@vuzs.net> wrote:

Right Answer is : False

Rational:

Purpose of declaring a method final is that it is not overridden by
sub-classes. So its possible that a method can be final while its class is not.

for example:

public class MyClass {
 public final void myFinalMethod() {...}
} 

Regards

Zubair Hussain

www.vuzs.net

On Sun, May 20, 2012 at 7:57 AM, Umair Saulat <saulat.umair@googlemail.com> wrote:

A method can not be made final until whole class is made final. 

► True

► False

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Regards, 

Umair Saulat

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Regards, 

Umair Saulat

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Regards, 

Umair Saulat

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