sample-jframe.java

JFrame frame=new JFrame("TRAIN TICKET");  
        frame.setSize(800,600);             
        frame.setLayout(null);    
        frame.setVisible(true); 
        
        
        //label     
        JLabel l1 = new JLabel("NAME :");
        frame.add(l1);
        l1.setBounds(50,45,100,60);
        JLabel l2 = new JLabel("CATEGORY :");
        l2.setBounds(50,60,150,90);;
        frame.add(l2);
        JLabel l3 = new JLabel("DESTINATION :");
        frame.add(l3);
        l3.setBounds(50,70,150,120);

        //textfield
        TextField name = new TextField ();
        frame.add(name);
        name.setBounds(200,60,200,20);
        TextField cate= new TextField ();
        frame.add(cate);
        cate.setBounds(200,90,200,20);
        TextField desti= new TextField ();
        frame.add(desti);
        desti.setBounds(200,125,200,20);

        //text
        JTextArea tout = new JTextArea();
        frame.add(tout);
        tout.setBounds(450,50,300,400);
        
        //button    
        JButton no=new JButton("WELCOME TO TRAIN TICKET PADANG BESAR");
        no.setBounds(0,0,800,40); //(,,lebar,tinggi)
        frame.add(no,BorderLayout.NORTH);  
        

        JButton sub = new JButton("Submit"); 
        frame.add(sub);
        sub.setBounds(350,500,100,20);
        sub.addActionListener(new ActionListener() {

            @Override
            public void actionPerformed(ActionEvent e) {
                double price = 0.00;
                double tax = 0.06;
                double charge = 0.00;
                double total = 0.00;;

		

		System.out.println(price);
                //double total;
                
                String data1 = new String(name.getText());
                String data2 = new String(cate.getText());
                String data3 = new String(desti.getText());
//                data2,data3;
//                data1 = ;
//                data2 = cate.getText();
//                data3 = desti.getText();

                if (data3.equals("Alor Setar")) {
                    price = 5.00;
                }
                else if (data3.equals("Sungai Petani")) {
                    price = 5.00;
                }
                else if (data3.equals("Anak Bukit")) {
                    price = 6.00;
                }
                else if (data3.equals("Tasek Gelugor")) {
                    price = 11.00;
                }
                else if (data3.equals("Gurun")) {
                    price = 9.00;
                }

                if (data2.equals("Children")) {
                    charge = 0.00;
                }
                else if (data2.equals("Adult")) {
                    charge = 0.00;
                }
                else if (data2.equals("Elder")) {
                    charge = 0.15;
                }
                
                double total_tax_price = ( price * tax );
		double total_charge_price = (price * charge);
		total = price + total_charge_price + total_tax_price;
            
                System.out.println(price);
                tout.setText(" Customer Name: "+data1+"\n Destination: "+data3+"\n Ticket Price: RM "+(price + total_charge_price)+"\n SST: RM "+total_tax_price+"\n Total Price: RM "+total);
            }
        });