easy question for experts

Hi experts,
I have a little problem with my program,

1.How can I make a textField takes just int, or just float values (not Strings).
2.I have created a class called carComponent to create objects for a Hashtable (which is not designed yet). What I want is by clicking the button “Submit” the variables from the class carComponent can get the text from the textFileds.

   

NOTE: I AM NOT USING “JAVA SWING”.

That’s all for now.

Thanks for your corporation in advance.

Below is my code

// importing java libraries.
import java.awt.*;
import java.util.*;
import java.awt.event.*;


// extending the application frame and implementing ActionListener to preform actions
public class myServer extends Frame implements ActionListener{

    //definig variables
    private TextField tf1,tf2,tf3,tf4,tf5, tf6;
    private Button submit;
    private Label L, L1, L2, L3, L4, L5;
    private Font myFont;
    private Panel p1,p2,p3,p4,p5,p6,p7;
    private Hashtable table;

        public myServer() {
          // giving a lable to the frame
                  super("::::(SERVER)::::");

          //Building the GUI with 6 TextFields and One Button
          //setting up the overall layout with 7 panels
          setLayout(new GridLayout(7,1,90,0));
                  p1 = new Panel();
          p2 = new Panel();
          p3 = new Panel();
          p4 = new Panel();
          p5 = new Panel();
          p6 = new Panel();
          p7 = new Panel();
          add(p1);
          add(p2);
          add(p3);
          add(p4);
          add(p5);
          add(p6);
          add(p7);

          // setting up panel 1 layout with one Label
          p1.setLayout(new FlowLayout(FlowLayout.LEFT));
          L = new Label("Enter the available parts information to update the database:");
          p1.add(L);
          myFont = new Font("Times New Roman", Font.BOLD, 12);
          L.setFont(myFont);
          L.setBackground(Color.yellow);
          L.setForeground(Color.black);

          // setting up panel 2 layout with a Label and a Textfield
          p2.setLayout(new FlowLayout(FlowLayout.LEFT));
          L1  = new Label("Model Name:         ");
          tf1 = new TextField(10); //model name textfield
          p2.add(L1);
          p2.add(tf1);

          // setting up panel 3 layout with a Label and a Textfield
          p3.setLayout(new FlowLayout(FlowLayout.LEFT));
          L2 = new Label("Model Part Name:");
          tf2 = new TextField(10);//Model Part Name textfield
          p3.add(L2);
          p3.add(tf2);

          // setting up panel 4 layout with a Label and a Textfield
          p4.setLayout(new FlowLayout(FlowLayout.LEFT));
          L3  = new Label("Model Built Year:   ");
          tf3 = new TextField(10); //Model Model Built Year textfield
          p4.add(L3);
          p4.add(tf3);

          // setting up panel 5 layout with a Label and a Textfield
          p5.setLayout(new FlowLayout(FlowLayout.LEFT));
          L4 = new Label("Price £:                   ");
          tf4 = new TextField(10);//price textfield
          p5.add(L4);
          p5.add(tf4);

          // setting up panel 6 layout with a Label, Textfield and a Button
          p6.setLayout(new FlowLayout(FlowLayout.LEFT));
          L5 = new Label("Available Quantity:");
          tf5 = new TextField(10);//Available Quantity textfield
          submit = new Button("Submit");
          p6.add(L5);
          p6.add(tf5);
          p6.add(submit);

          //adding ActoinListener to Button b
          submit.addActionListener(this);

          // setting up panel 7 to test the button and the textfields
          p7.setLayout(new FlowLayout(FlowLayout.CENTER));
          tf6 = new TextField (" RESULT TEST FIELD ",110);

          // stting TextField tf6 into Uneditable form
          tf6.setEditable(false);
          p7.add(tf6);

          //seting the size of the frame
              setSize(new Dimension(950, 300));

          // show the GUI
          show();
           }

       public static void main(String[] args) {
           // use the constructor to build the GUI
                   myServer server = new myServer();
           }


       
       
        public void actionPerformed(ActionEvent e) {

            // defining the variables that be used
            String str1,str2,str3,str4,str5;
            str1 = tf1.getText();
            str2 = tf2.getText();
            str3 = tf3.getText();
            str4 = tf4.getText();
            str5 = tf5.getText();


            // setting ActionPerformance for Button b
            // to display information entered in tf1, tf2, tf3, tf4, tf5
            // into tf6
            if (e.getSource() == submit){
           
            // test result field to make sure that the button and tetfields are working.
            tf6.setText("Model Name:"+str1 + "----Model Part Name:" + str2 + "----Model Built Year:"+ str3 + "-----Price£:" + str4 + "----Available Quantity:" + str5);
      }

  }

}

/*creating a class called carComponent
to creat objects to put them in the hashTabel*/
class carComponent{

   //definig variables of the class
   public String modelName, partName;
   public int builtYear, availableQuantity;
   public float price;

}