Identifire expected error and ) expected error

Question

I am extreamly new to java and have what most people(but me) would consider a rather simple assignment.
I have attempted to write a simple mortgage calculator with a GUI. When I attempted to compile I got the following errors
java:99 <identifire>expected
public void buttonMouseClicked(java.awt.event.mouseEvent)
java:128 ')' expected
My code is below
import java.awt.*;
import java.awt.event.*;
import javax.swing.*;
import javax.swing.event.*;
public class ScurryMortcalc1 extends JPanel
     private JButton button1;
     private JTextField textField1;
     private JTextField textField2;
     private JLabel component4;
     private JLabel component5;
     private JTextField textField3;
     private JLabel lable3;
     private JTextField textField4;
     private JLabel lable4;
     public ScurryMortcalc1()
          //construct components
          button1 = new JButton ("Calculate Payment");
          textField1 = new JTextField (5);
          textField2 = new JTextField (5);
          component4 = new JLabel ("Principal");
          component5 = new JLabel ("Interest Rate");
          textField3 = new JTextField (5);
          lable3 = new JLabel ("Term in Yrs");
          textField4 = new JTextField (5);
          lable4 = new JLabel ("Monthly Payment"); // should not be able to input text into this field
          //adjust size and set layout
          setSize (new Dimension (496, 182)); //<--- changed
          setLayout (null);
          //add components
          add (button1);
          add (textField1);
          add (textField2);
          add (component4);
          add (component5);
          add (textField3);
          add (lable3);
          add (textField4);
          add (lable4);
          //set component bounds (This will put everything exactly where you want it)
          button1.setBounds (34, 5, 100, 20);
          textField1.setBounds (35, 39, 102, 25);
          textField2.setBounds (36, 75, 100, 25);
          component4.setBounds (171, 39, 100, 25);
          component5.setBounds (170, 75, 100, 25);
          textField3.setBounds (37, 110, 100, 25);
          lable3.setBounds (171, 110, 100, 25);
          textField4.setBounds (37, 140, 100, 25);
          lable4.setBounds (169, 140, 100, 25);
     //<--- create a method that will activate the components
     public void initComponents() {
        //<---change text/mouse listener to action listener
        //<--- TextListener is not supported in JTextField (see my examples)
        //<--- MouseListener is cumbersome
        //<--- you can also use other listeners supported in Swing (see Java Tutorials)
          textField1.addActionListener(new ActionListener() {
            public void actionPerformed(ActionEvent e) {
         button1.addActionListener(new ActionListener() {
                 public void actionPerformed(ActionEvent e) {
         textField2.addActionListener(new ActionListener() {
                 public void actionPerformed(ActionEvent e) {
         textField3.addActionListener(new ActionListener() {
                 public void actionPerformed(ActionEvent e) {
    public static void main (String[] args)
         //<---do this sequence
         ScurryMortcalc1 panel = new ScurryMortcalc1();
         panel.initComponents();
          JFrame frame = new JFrame ("JPanel Preview");
          frame.setDefaultCloseOperation (JFrame.EXIT_ON_CLOSE);
          frame.getContentPane().add (new ScurryMortcalc1());
          frame.setSize(600,400);  //<--- added
          frame.setVisible (true);
public void button1MouseClicked(java.awt.event.mouseEvent )
          String Principal_str = textField1.getText();
               double Principal = double.ValueOf(Principle_str).doubleCalue();
              String interestRate_str = textField2.getText();
              double interestRate = (double.valueOf(interestRate_str).doubleValue()) / 100+1;
              string Term_in_yrs_str = textField3.getText();
              double Term_in_yrs_str = double valueOf(Term_in_yrs_str).doubleValue();
              double Calc = (double) Math.pow(interestRate, Term_in_yrs);
              java.text.DecimalFormat dfm = new java.text.DecimalFormat("#,###.00"); // formats numbers to two places after the decimal
              double Monthy_Payment = (Principal * Calc * interestRate - 1)) / (12 * Calc -1));
              String Monthy_Payment_str = dfm.format((Monthy_Payment)));
                  textField4.setText(Monthly_Payment_str);
          try {
               initComponents();
          catch (Exception e) { //<---add bracket
               e.printStackTrace();
}

Answer 1

A bunch of syntax errors: double is not the same as Double. string is not the same as String. You have too many )'s. mouseEvent is not the same as MouseEvent. And you need to use a variable name in the button1MouseClicked method declaration - for example public void button1MouseClicked(java.awt.event.mouseEvent event)