here two java codes are there 1. Without using applet and 2. With applet Second one failed to retrieve data

Question

0.00/5 (No votes)

See more:

1.Without using applet

Java

//sampel java prg to display record from the database "Students" using mysql- table(s) name: "Sem3Results"

import java.sql.*;										// 1
import java.io.BufferedReader;									// 2
import java.io.IOException;									// 3
import java.io.InputStreamReader;  								// 4	 
 												// 5
public class Sem3Results									// 6	
{  												// 7
   												// 8
 public static void main(String[] args)  							// 9
 {												// 10	
      												// 11
System.out.println("Enter Your IDNo");								// 12
     try											// 13
         {											// 14
												// 15		
          BufferedReader bufferRead = new BufferedReader(new InputStreamReader(System.in));	// 16
	    String s = bufferRead.readLine();							// 17
         Connection conn = DriverManager.getConnection("jdbc:odbc:FirstData"); 			// 18
         Statement stmt = conn.createStatement();						// 19
         String strSelect = "select * from Sem3Results where IDNo ="+s;				// 20
       												// 22
 												// 23
         ResultSet rset = stmt.executeQuery(strSelect);						// 24
												// 25 
        											// 26
												// 27
while(rset.next()) 										// 28
            {   										// 29
           											// 30
int	IDNo= rset.getInt("IDNo");								// 31
String  Name= rset.getString("Name");								// 32
int     ENGLISH= rset.getInt("ENGLISH");							// 33	
int     IILANG= rset.getInt("IILANG");								// 34	
int     MATHEMATICS= rset.getInt("MATHEMATICS");						// 35
int     STATISTIC= rset.getInt("STATISTIC");                                 			// 36	
int     COMPUTERSCIENCE= rset.getInt("COMPUTERSCIENCE");					// 37
int     MATHEMATICSPR= rset.getInt("MATHEMATICSPR");					        // 38
int     STATISTICSPR= rset.getInt("STATISTICSPR");						// 39	
int     COMPUTERSCIENCEPR= rset.getInt("COMPUTERSCIENCEPR");					// 40
int     TOTAL= rset.getInt("TOTAL");								// 41
int     TPOSITION= rset.getInt("TPOSITION");							// 42
int     GrandTOTAL= rset.getInt("GrandTOTAL");							// 43
int     GPOSITION= rset.getInt("GPOSITION");							// 44
float  PERCENTAGE = rset.getFloat("PERCENTAGE");						// 45
												// 46
            System.out.println("IDNo 		    :12141146"+IDNo);				// 47
 	    System.out.println("Name 		    :"+Name);					// 48
 	    System.out.println("English 	    :" + ENGLISH);  	 			// 49
	    System.out.println("II Language 	    :" + IILANG);				// 50
	    System.out.println("Mathematics 	    :" + MATHEMATICS);				// 51	
            System.out.println("Statistics 	    :"+ STATISTIC);				// 52
	    System.out.println("Computer Science    :"+COMPUTERSCIENCE);			// 53
 	    System.out.println("Mathematics PR      :"+MATHEMATICSPR);				// 54
	    System.out.println("Statistics PR       :"+STATISTICSPR);				// 55
            System.out.println("Computer Science PR :"+COMPUTERSCIENCEPR);			// 56
 	    System.out.println("Total               :"+TOTAL);					// 57
	    System.out.println("Rank                :"+TPOSITION);				// 58
	    System.out.println("Grand Total         :"+GrandTOTAL);				// 59	
	    System.out.println("Rank                :"+GPOSITION);				// 60
	    System.out.println("Percentage          :"+PERCENTAGE);				// 61
break;												// 62
}  												// 63		
												// 64
												// 65
}          											// 66
        catch(SQLException e) 									// 67 	
         {											// 68
         e.printStackTrace();									// 69
         }											// 70
        catch(IOException e)									// 71
	{											// 72
		e.printStackTrace();								// 73
	}											// 74
   }												// 75
}												// 76

2. With Applet

Java

import java.sql.*;
import java.applet.*;
import java.awt.*;	
import java.awt.event.*;
import java.io.*;	
			

/*
<HTML>
<BODY>
<HEAD>
<applet code="Sem3ResultsApplet" width=1000 height=1000>
</applet>
</HEAD>
</BODY>
br mode="hold" />*/


public class Sem3ResultsApplet extends Applet implements ItemListener,ActionListener,MouseListener
{
Label LIDNo;
TextField IDNo;
Button GO;

String  Name;
int     ENGLISH;
int     IILANG;
int     MATHEMATICS;
int     STATISTIC;
int     COMPUTERSCIENCE;
int     MATHEMATICSPR;
int     STATISTICSPR;
int     COMPUTERSCIENCEPR;
int     TOTAL;
int     TPOSITION;
int     GrandTOTAL;
int     GPOSITION;
float   PERCENTAGE;

public void init() 
 {	
	// LABEL
	LIDNo = new Label("Enter Your IDNo :",Label.LEFT);
	//TEXT FIELD
	IDNo  = new TextField(8);
	// BUTTON
	GO = new Button("GO");

	// Adding items
	add(LIDNo);
	add(IDNo);
	add(GO);


	// Adding Listeners
	IDNo.addActionListener(this);
	GO.addActionListener(this);
	addMouseListener(this);
}

// Provide empty implementations for the other MouseListener methods.
public void mouseClicked(MouseEvent me) {
}
public void mouseEntered(MouseEvent me) {
}
public void mouseExited(MouseEvent me) {
}
public void mouseReleased(MouseEvent me) {
}
public void mousePressed(MouseEvent me) {
}

public void actionPerformed(ActionEvent ae)
 {
 String str = ae.getActionCommand();
 if (ae.getSource() == GO)
{
try
{
Connection conn = DriverManager.getConnection("jdbc:odbc:FirstData"); 
Statement stmt = conn.createStatement();
String strSelect = "select * from Sem3Results where IDNo ="+IDNo.getText();
ResultSet rset   = stmt.executeQuery(strSelect);
while(rset.next())
{
int	IDNo= rset.getInt("IDNo");
String  Name= rset.getString("Name");
int     ENGLISH= rset.getInt("ENGLISH");
int     IILANG= rset.getInt("IILANG");
int     MATHEMATICS= rset.getInt("MATHEMATICS");
int     STATISTIC= rset.getInt("STATISTIC");
int     COMPUTERSCIENCE= rset.getInt("COMPUTERSCIENCE");
int     MATHEMATICSPR= rset.getInt("MATHEMATICSPR");
int     STATISTICSPR= rset.getInt("STATISTICSPR");
int     COMPUTERSCIENCEPR= rset.getInt("COMPUTERSCIENCEPR");
int     TOTAL= rset.getInt("TOTAL");
int     TPOSITION= rset.getInt("TPOSITION");
int     GrandTOTAL= rset.getInt("GrandTOTAL");
int     GPOSITION= rset.getInt("GPOSITION");
float  PERCENTAGE= rset.getFloat("PERCENTAGE");	
break;
}
repaint();
}
catch(SQLException e) 
{
 e.printStackTrace();
}
}
}

public void itemStateChanged(ItemEvent ie) {
repaint();
}
public void paint(Graphics g) 
{
g.drawString("IDNo		:12141146"+IDNo.getText(),100,100);
g.drawString("Name    		:"+Name,100,120);
g.drawString("ENGLISH   	:"+ENGLISH,100,140);
g.drawString("IILANG 		:"+IILANG,100,160);
g.drawString("MATHEMATICS	:"+MATHEMATICS,100,180);
g.drawString("STATISTICS	:"+STATISTIC,100,200);
g.drawString("COMPUTERSCIENCE	:"+COMPUTERSCIENCE,100,220);
g.drawString("MATHEMATICSPR	:"+MATHEMATICSPR,100,240);
g.drawString("STATISTICSPR	:"+STATISTICSPR,100,260);
g.drawString("COMPUTERSCIENCEPR	:"+COMPUTERSCIENCEPR,100,280);
g.drawString("TOTAL		:"+TOTAL,100,300);
g.drawString("TPOSITION		:"+TPOSITION,100,320);
g.drawString("GrandTOTAL	:"+GrandTOTAL,100,340);
g.drawString("GPOSITION		:"+GPOSITION,100,360);
g.drawString("PERCENTAGE	:"+PERCENTAGE,100,380);


}


}

My question is code(1) is executing correctly and retrieving data.
code(2) is executing correctly and failed to retrieve data from database.

Note: Both codes are similar and shows similar output.
There are taken from same database and table too.

Posted 21-May-13 0:31am

Ravindra Reddy Ambati

Updated 21-May-13 1:04am

TorstenH.

v3

Add a Solution

Comments

Ravindra Reddy Ambati 21-May-13 7:08am

Can't get sir

Ravindra Reddy Ambati 21-May-13 7:10am

I added numbers for reference purpose

Prasad Khandekar 21-May-13 7:10am

Hello Ravindra,

Code 2 is bound to fail the applet will not be able to get handle of the ODBC Datasource named FirstData. Use alternate syntax. Refer to link provided in my comments to your earlier question.

Ravindra Reddy Ambati 21-May-13 7:11am

But code 1 is done with same ODBC

Ravindra Reddy Ambati 21-May-13 7:12am

FirstData is my database name which I did it in local System

Prasad Khandekar 21-May-13 7:19am

As a security precaution, applets run in a sandbox inside a browser, which restricts what it is allowed to do. For example, they can't access the local file system, can only make network connections back to the host from which they were served, and they can't read some of the system properties that a Java application can read.

TO be able to do this you will have to sign your applet. Once signed you will have to use the alternate syntax for connecting to remote sql server. Please see the link provided in my comments to your earlier question.

Ravindra Reddy Ambati 21-May-13 7:22am

Would you kindly edit it

Connection conn = DriverManager.getConnection("jdbc:odbc:FirstData");
Statement stmt = conn.createStatement();
String strSelect = "select * from Sem3Results where IDNo ="+IDNo.getText();
ResultSet rset = stmt.executeQuery(strSelect);

Prasad Khandekar 21-May-13 7:33am

Use a connection string as per following syntax

jdbc:sqlserver://[serverName[\instanceName][:portNumber]][;property=value[;property=value]]

Replace values for serverName, instanceName, portNumber as per your environment. For example if you have SQL server instance RavindraDB running on 10.91.34.45 at port 1443 with database user as RavindraUser and password as MyPass then the connection string will be

jdbc:sqlserver://10.91.34.45\RavindraDB:1443;user=RavindraUser;password=MyPass

Regards,

Ravindra Reddy Ambati 21-May-13 7:41am

It showing error illegal escape character
code
jdbc:sqlserver://192.168.111.103\Students:1443;user=rambati;password=Nokia@123

Ravindra Reddy Ambati 21-May-13 7:44am

and using odbc

Richard MacCutchan 21-May-13 9:27am

The backslash before Students should be escaped thus:
"jdbc:sqlserver://192.168.111.103\\Students:1443;user=rambati;password=Nokia@123".

Add your solution here

Treat my content as plain text, not as HTML

Preview 0

…

Existing Members

Sign in to your account

...or Join us

Download, Vote, Comment, Publish.

Your Email
Password
Forgot your password?

Your Email
This email is in use. Do you need your password?
Optional Password

I have read and agree to the Terms of Service and Privacy Policy
Please subscribe me to the CodeProject newsletters

When answering a question please:

Read the question carefully.
Understand that English isn't everyone's first language so be lenient of bad spelling and grammar.
If a question is poorly phrased then either ask for clarification, ignore it, or edit the question and fix the problem. Insults are not welcome.
Don't tell someone to read the manual. Chances are they have and don't get it. Provide an answer or move on to the next question.

Let's work to help developers, not make them feel stupid.

This content, along with any associated source code and files, is licensed under The Code Project Open License (CPOL)