Subject.java

/*
 * To change this license header, choose License Headers in Project Properties.
 * To change this template file, choose Tools | Templates
 * and open the template in the editor.
 */

/**
 *
 * @author abhiram
 */
import java.awt.*;
import java.awt.event.*;

public class Subject extends java.awt.Frame {

    static String Subject;

    
            
    /**
     * Creates new form Subject
     */
    public Subject() {
        initComponents();
    }



    /**
     * This method is called from within the constructor to initialize the form.
     * WARNING: Do NOT modify this code. The content of this method is always
     * regenerated by the Form Editor.
     */
    // <editor-fold defaultstate="collapsed" desc="Generated Code">//GEN-BEGIN:initComponents
    private void initComponents() {

        btnChemistry = new javax.swing.JButton();
        btnPhysics = new javax.swing.JButton();
        lblSelectSubject = new javax.swing.JLabel();

        addWindowListener(new java.awt.event.WindowAdapter() {
            public void windowClosing(java.awt.event.WindowEvent evt) {
                exitForm(evt);
            }
        });

        setLayout(new FlowLayout());
        setSize(1000,1000);

        btnChemistry.setText("Chemistry");
        btnChemistry.setActionCommand("chem");
        add(btnChemistry);
         btnChemistry.setBounds(151, 125, 89, 25);
        btnChemistry.addActionListener(new ButtonClickListener());

        btnPhysics.setText("Physics");
        btnPhysics.setActionCommand("phy");
        add(btnPhysics);
        btnPhysics.setBounds(151, 181, 89, 25);
        btnPhysics.addActionListener(new ButtonClickListener());

        lblSelectSubject.setText("Select a Subject");
        add(lblSelectSubject);
        lblSelectSubject.setBounds(105, 42, 182, 16);

        
        
        setLayout(null);
    }// </editor-fold>//GEN-END:initComponents

    /**
     * Exit the Application
     */
    private void exitForm(java.awt.event.WindowEvent evt) {//GEN-FIRST:event_exitForm
        System.exit(0);
    }//GEN-LAST:event_exitForm

    /**
     * @param args the command line arguments
     */
    public static void main(String args[]) {
        java.awt.EventQueue.invokeLater(new Runnable() {
            public void run() {
                new Subject().setVisible(true);
            }
        });
    }


    // Variables declaration - do not modify//GEN-BEGIN:variables
    private javax.swing.JButton btnChemistry;
    private javax.swing.JButton btnPhysics;
    private javax.swing.JLabel lblSelectSubject;
    // End of variables declaration//GEN-END:variables

    public class ButtonClickListener implements ActionListener{
        public void actionPerformed(ActionEvent e){
            String command = e.getActionCommand();
            if(command.equals("phy")){
               btnPhysics.getParent().setVisible(false);
               new PhysicsHomePage(command).setVisible(true);
               Subject = command;
            }
            else{
                btnChemistry.getParent().setVisible(false);
                new PhysicsHomePage(command).setVisible(true);
                Subject = command;
            }

        }
    }

}