Incompatibe type error can some please help stuck in rut

Question

found : double
required: javax.swing.JTextField
TotalIncomeField = (num1 + num2 + num3);
try {
double num1 = Double.parseDouble(LoansField.getText());
double num2 = Double.parseDouble(WagesField.getText());
double num3 = Double.parseDouble(OtherField.getText());
double num4 = Double.parseDouble(RentField.getText());
double num5 = Double.parseDouble(FoodField.getText());
double num6 = Double.parseDouble(OtherField2.getText());
String op1 = (String)LoanComboBox.getSelectedItem();
String op2 = (String)WagesComboBox.getSelectedItem();
String op3 = (String)OtherComboBox.getSelectedItem();
String op4 = (String)RentComboBox.getSelectedItem();
String op5 = (String)FoodComboBox.getSelectedItem();
String op6 = (String)Other2ComboBox.getSelectedItem();
//Below I am adding the loans, wages & other field so that it total correctly incompatible type error found below (1).
(1) TotalIncomeField = (num1 + num2 + num3);
(2) TotalSpendingField = (num4 + num5 + num6);
//Here above I am adding the rent, food & other field so that it total correctly incompatible type error found above (2)
double result = 0;
if (op1.equals("Weekly"))
result = num1 * 4.3333333;
else if (op1.equals("Monthly"))
result = num1;
else if (op1.equals("Yearly"))
result = num1 / 12;
else if
(op2.equals("Weekly"))
result = num2 * 4.3333333;
else if (op2.equals("Monthly"))
result = num2;
else if (op2.equals("Yearly"))
result = num2 / 12;
else if
(op3.equals("Weekly"))
result = num3 * 4.3333333;
else if (op3.equals("Monthly"))
result = num3;
else if (op3.equals("Yearly"))
result = num3 / 12;
TotalIncomeField.setText(String.format("%.2f",result));
if
(op4.equals("Weekly"))
result = num4 * 4.3333333;
else if (op4.equals("Monthly"))
result = num4;
else if (op4.equals("Yearly"))
result = num4 / 12;
else if
(op5.equals("Weekly"))
result = num5 * 4.3333333;
else if (op5.equals("Monthly"))
result = num5;
else if (op5.equals("Yearly"))
result = num5 / 12;
else if
(op6.equals("Weekly"))
result = num6 * 4.3333333;
else if (op6.equals("Monthly"))
result = num6;
else if (op6.equals("Yearly"))
result = num6 / 12;
TotalSpendingField.setText(String.format("%.2f",result));
} catch (NumberFormatException ex) {
}

Answer 1

TotalIncomeField is a JTextField object reference, not a numeric value holder. What you may want is to put the string representation of the calculation into the CONTENTS of the JTextField. There is a setText method for that.
TotalIncomeField.setText(theText);
I'll assume you can work out how to turn the calculation into a string representing that calculation.
SIGH SIGH SIGH
Thanks for CROSSPOSTING this, you dolt.
http://forum.java.sun.com/thread.jspa?threadID=780703