Retirment calculator

This is the Retirement  calculator done by using awt and swings this is good and execute fastley

the source code is :

import java.awt.*;
import java.awt.event.*;
import java.lang.*;
import javax.swing.*;
import javax.swing.text.PlainDocument;
import javax.swing.text.AttributeSet;
import javax.swing.text.BadLocationException;
class ret12
{
  JFrame x;
  JTextField t1,t2,t3,t4,t5,t6;
  JLabel l1,l2,l3,l4,l5,l7;
  Button b1,b2;
  ret12()
  {
      x=new JFrame("RETIRMENT CALUCULATOR");
      l1=new JLabel("PRESENT AGE");
      l2=new JLabel("RETIRED AGE");
      l3=new JLabel(" INTEREST RATE");
      l4=new JLabel("TOTAL MONEY");
      l5=new JLabel("AMOUNT DEPOSIT");
      l7=new JLabel("TOTAL YEARS");
      t1=new JTextField(new numbers(2),"",10);
      t2=new JTextField(new numbers(2),"",10);
      t3=new JTextField("",10);
      t4=new JTextField("",10);
      t5=new JTextField(new numbers(5),"",10);
      t6=new JTextField("",10);
      b1=new Button("CHECK");
      b2=new Button("CLEAR");
      x.setLayout(null);
      x.setResizable(false);
      l1.setBounds(30,40,120,40);
      t1.setBounds(220,50,150,25);
      l2.setBounds(30,80,120,35);
      t2.setBounds(220,85,150,25);
      l5.setBounds(30,120,150,35);
      t5.setBounds(220,125,150,25);
      l3.setBounds(28,160,150,35);
      t3.setBounds(220,165,150,25);
      l7.setBounds(30,200,120,35);
      t6.setBounds(220,205,150,25);
      l1.setFont(new Font("italic",Font.BOLD,16));
      l2.setFont(new Font("italic",Font.BOLD,16));
      l3.setFont(new Font("italic",Font.BOLD,16));
      l4.setFont(new Font("italic",Font.BOLD,16));
      l5.setFont(new Font("italic",Font.BOLD,16));
      l7.setFont(new Font("italic",Font.BOLD,16));
      l4.setBounds(30,240,120,35);
      t4.setBounds(220,245,150,25);
      t4.setEditable(false);
      b1.setBounds(60,300,100,30);
      b2.setBounds(210,300,100,30);
      Font f=new Font("Arial",Font.BOLD,30);
      x.add(l1);
      x.add(t1);
      x.add(l2);
      x.add(t2);
      x.add(l5);
      x.add(t5);
      x.add(l3);
      x.add(t3);
      x.add(l7);
      x.add(t6);
      x.add(l4);
      x.add(t4);
      x.add(b1);
      x.add(b2);
      x.addWindowListener(new WindowAdapter()
                              {
          public void windowClosing(WindowEvent ee)
          {
              System.exit(0);
          }
      });
      t1.setBackground(Color.PINK);
      t2.setBackground(Color.PINK);
      t3.setBackground(Color.PINK);
      t5.setBackground(Color.PINK);
      t6.setEditable(false);
      x.setSize(400,400);
      x.setVisible(true);
      b1.addKeyListener(new KeyAdapter()
                            {
          public void KeyPressed(KeyEvent e)
          {
              try
              {
                  int key=e.getKeyCode();
                  if(key==KeyEvent.VK_SPACE)
                  {
                      if(t1.getText().equals(""))
                          JOptionPane.showMessageDialog(x,"Please Enter the Present Age");
                      else if(Integer.parseInt(t1.getText())<20||Integer.parseInt(t1.getText())>55)
                          JOptionPane.showMessageDialog(x,"enter the present age between 20 and 55");  
                      else if(t2.getText().equals(""))
                          JOptionPane.showMessageDialog(x,"Please Enter Retired Age");
                      else if(Integer.parseInt(t2.getText())<50||Integer.parseInt(t2.getText())>65)
                          JOptionPane.showMessageDialog(x,"enter the Retirment age between 50 and 65");
                      else if(t5.getText().equals(""))
                          JOptionPane.showMessageDialog(x,"Please Enter Deposit Amount");
                      else if(Double.parseDouble(t5.getText())<=0||Double.parseDouble(t5.getText())>20000)
                          JOptionPane.showMessageDialog(x,"enter the amount between 1 and 13000");
                      else if(t3.getText().equals(""))
                          JOptionPane.showMessageDialog(x,"Please Enter Intrest Rate");
                      else if(Double.parseDouble(t3.getText())<=0||Double.parseDouble(t3.getText())>12)
                          JOptionPane.showMessageDialog(x,"enter the Intrest Rate between 1 and 12");
                      myfunction();
                           
                  }
              }
              catch(Exception ex)
              {
                  JOptionPane.showMessageDialog(x,"Check all the fields correctly without any Blanks and Alphabets");
              }
          }
      });
      b2.addKeyListener(new KeyAdapter()
                            {
          public void KeyPressed(KeyEvent e)
          {
              int key1=e.getKeyCode();
              if(key1==KeyEvent.VK_SPACE)
              {
                  t1.setText("");
                  t2.setText("");
                  t3.setText("");
                  t4.setText("");
                  t5.setText("");
                  t6.setText("");
              }
          }
      });
      b1.addMouseListener(new MouseAdapter()
                              {
          public void mouseClicked(MouseEvent e)
          {
              try
              {
                  if(t1.getText().equals(""))
                  JOptionPane.showMessageDialog(x,"Please Enter the Present Age");
                  else if(Integer.parseInt(t1.getText())<20||Integer.parseInt(t1.getText())>55)
                      JOptionPane.showMessageDialog(x,"Please Enter the Present Age Between 20 and 55");  
                  else if(t2.getText().equals(""))
                      JOptionPane.showMessageDialog(x,"Please Enter Retired Age");
                  else if(Integer.parseInt(t2.getText())<50||Integer.parseInt(t2.getText())>65)
                      JOptionPane.showMessageDialog(x,"Please Enter the Retirment Age Between 50 and 65");
                  else if(t5.getText().equals(""))
                      JOptionPane.showMessageDialog(x,"Please Enter Deposit Amount");
                  else if(Double.parseDouble(t5.getText())<=0||Double.parseDouble(t5.getText())>50000)
                      JOptionPane.showMessageDialog(x,"Please Enter the Amount Between 1 and 50000");
                  else if(t3.getText().equals(""))
                      JOptionPane.showMessageDialog(x,"Please Enter Intrest Rate");
                  else if(Double.parseDouble(t3.getText())<=0||Double.parseDouble(t3.getText())>20)
                      JOptionPane.showMessageDialog(x,"Please Enter the Intrest Rate Between 1 and 20");
                  myfunction();
              }
              catch(Exception ex)
              {
                 JOptionPane.showMessageDialog(x,"Please Enter the Intrest Rate With Out Any Charectres");
                 t6.setText("");
                 t4.setText("");
              }
          }
      });
 
      b2.addMouseListener(new MouseAdapter(){
          public void mouseClicked(MouseEvent e)
          {
              t1.setText("");
              t2.setText("");
              t3.setText("");
              t4.setText("");
              t5.setText("");
              t6.setText("");
      }
      });
  }
  public void myfunction()
  {
      Double p=Double.parseDouble(t5.getText());
      Double i=Double.parseDouble(t3.getText())/100;
      Double q=12.0;
      int p1=Integer.parseInt(t2.getText());
      int p2=Integer.parseInt(t1.getText());
      Double p3=Double.parseDouble(t3.getText());
      int n=Integer.parseInt(t2.getText())-Integer.parseInt(t1.getText());
      Double tot=0.0;
      Double n2=60.0;
      for(int j=0;j<n;j++)
      {
          tot=p+(tot+(tot*i));
      }
      if((p2>=20||p2<=55)&&(p1>=50&&p1<=65)&&(p3>0&&p3<=20)&&(p>=0&&p<=50000))
      {
          Long l=(new Double(Math.round(tot))).longValue();
          String s=(Long.toString(l));
          String s1=" ";
          if(s.length()==5)
          {
              s1+=(s.substring(0,2))+","+(s.substring(2,s.length()));
              t4.setText("Rs:"+s1);
          }
          else if(s.length()==6)
          {
              s1+=(s.substring(0,1))+","+(s.substring(1,3))+","+(s.substring(3,s.length()));
              t4.setText("Rs:"+s1);
          }
          else if(s.length()==7)
          {
              s1+=(s.substring(0,2))+","+(s.substring(2,4))+","+(s.substring(4,s.length()));
              t4.setText("Rs:"+s1);
          }
          else if(s.length()==8)
          {
              s1+=(s.substring(0,1))+","+(s.substring(1,3))+","+(s.substring(3,5))+","+(s.substring(5,s.length()));
              t4.setText("Rs:"+s1);
          }
          else if(s.length()==9)
          {
              s1+=(s.substring(0,2))+","+(s.substring(2,4))+","+(s.substring(4,6))+","+(s.substring(6,s.length()));
              t4.setText("Rs:"+s1);
          }
      }
      else
      {
          t4.setText("");
      }
    if((n>0&&n<=45)&&(p2>=20&&p2<=55)&&(p1>=50&&p1<=65)&&(p3>0&&p3<=20)&&(p>=0&&p<=50000))
    {
        t6.setText(Integer.toString(n));
    }
    else
    {
        t6.setText("");
    }
  }
  class numbers extends PlainDocument
  {
      private int limit;
      numbers(int limit)
      {
          super();
          this.limit = limit;
      }
    numbers(int limit, boolean upper)
      {
          super();
          this.limit = limit;
      }
    public void insertString(int offset, String str, AttributeSet a)
        throws BadLocationException
    {
        for (int i = 0; i < str.length(); i++)
        {
            if (!Character.isDigit(str.charAt(i)))
            {
                  return;
            }
        }
        if (str == null)
            return;
        if ((getLength() + str.length()) <= limit)
        {
        super.insertString(offset, str, a);
        }
    }
  }
  public static void main(String[] args)
  {
      ret12 r=new ret12();
  }
}

it executs perfectly

thank you