The StudentForm Class

Listing 16.3 StudentForm.java

import javax.swing.*;
import java.awt.*;
import java.awt.event.*;
import java.rmi.*;
import java.sql.*;

//Student entry form 
class StudentForm extends JInternalFrame{

  //instance variables
  private JTextField
    txtRollNumber = null,
    txtName = null,
    txtCourse = null;
  
  // reference to the remote object.	
  private DatabaseInterface server = null;
	
  //constructor
  public StudentForm(){
	
	//Create a JInternalFrame with 
	//the specified title 
	//and with resizability, closability, 
	//maximizability, 
	//and iconifiability specified. 
	super("Student Form",true,true,false,true);
		
	//method used to create components and to get
	//a reference to the remote object.
	setup();
		
	//Set the operation that will 
	//happen by default when 
	//the user initiates a 
	//"close" on this frame		
	this.setDefaultCloseOperation(
		JInternalFrame.DISPOSE_ON_CLOSE);
		
	//pack() causes subcomponents of this 
	//JInternalFrame to be laid 
	//out at their preferred size.
	pack();
		
	//Move this component to a new location. 
	setLocation(10,10);
		
	//Show this internal frame.
	show();

} 

//Method used to create components and to get 
  //a remote reference.
  private void setup(){
	
	//get the content pane object.
	Container cp = getContentPane();
		
	//Panels for placing different components.
	JPanel topPanel,centerPanel,btnPanel;
		
	//create panels
	topPanel = SwingComp.createPanel(
		cp,BorderLayout.NORTH,new GridLayout(1,1));

	centerPanel = SwingComp.createPanel(
		cp,BorderLayout.CENTER,new GridLayout(3,2));
		
	//Create a new ButtonPanel object.
	btnPanel = new ButtonPanel(new ButtonHandler());
		
	//add the component to this 
	//container(s) layout using the 
	//specified constraints object.
	cp.add(btnPanel,BorderLayout.SOUTH);
		
	//Set the border of this panel
	centerPanel.setBorder(
	   BorderFactory.createEmptyBorder(35,20,35,20));

	//{{Create labels, text boxes}} //
	JLabel lblTitle,lblRollNumber,lblName,lblCourse;
	
	lblTitle = SwingComp.createLabel(
		topPanel,"STUDENT INFORMATION",JLabel.CENTER);

	lblRollNumber = SwingComp.createLabel(
			centerPanel,"Roll Number");

	txtRollNumber = SwingComp.createTextField(centerPanel,10);
	lblName = SwingComp.createLabel(centerPanel,"Name");
	txtName = SwingComp.createTextField(centerPanel,10);
	lblCourse = SwingComp.createLabel(centerPanel,"Course");
	txtCourse = SwingComp.createTextField(centerPanel,10);
	 
	 // get a reference to the remote object.
	try{
	  server = MDI.getServerObject();
	  }catch(Exception ex){
	    System.out.println(ex.getMessage());
	 }
	}