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importjava.awt.*;importjava.awt.event.*;importjavax.swing.*;importjavax.swing.JButton;importjavax.swing.JTextField;importjava.text.DecimalFormat;publicclassMorgageCalculatorextendsJPanel{//globalvariableprivateJComboBoxIntRates;

privateJLabelprinlb,rateLb,termLb,paymtLb;

privateJButtoncalBtn,resetBtn;privateJTextFieldprinTxFld,rateTxFld,termTxFld,monthlyPayment;privateTextAreapayAmortTA;StringcurrentInt;

publicMorgageCalculator(){String[]comboItems={"5.35","5.50","5.75"};//currentInt=comboItems[0];//removelaterIntRates=newJComboBox(comboItems);

//createslabelsprinlb=newJLabel("PrincipalAmount:");rateLb=newJLabel("InterestRate:");termLb=newJLabel("Term:");paymtLb=newJLabel("MonthlyPayment:");

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//createstextfieldsprinTxFld=newJTextField("",10);rateTxFld=newJTextField("",5);rateTxFld.setEditable(false);termTxFld=newJTextField("",5);monthlyPayment=newJTextField("",10);monthlyPayment.setEditable(false);//comboboxpulldownIntRates=newJComboBox(comboItems);IntRates.setEditable(false);

/*ComboBoxdoesn'tneeditIntRates.addActionListener(this);*/payAmortTA=newTextArea(20,50);//createbuttonscalBtn=newJButton("Calculate");

calBtn.addActionListener(newActionListener(){publicvoidactionPerformed(ActionEventae){calculateMortgage();}});

resetBtn=newJButton("Reset");resetBtn.addActionListener(newActionListener(){publicvoidactionPerformed(ActionEventae){prinTxFld.setText("");

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rateTxFld.setText("");termTxFld.setText("");monthlyPayment.setText("");payAmortTA.setText("");}});

//addlabelsandfieldsadd(prinlb);add(prinTxFld);add(rateLb);add(IntRates);

add(rateTxFld);

add(termLb);add(termTxFld);add(paymtLb);add(monthlyPayment);add(payAmortTA);

add(calBtn);add(resetBtn);}publicvoidcalculateMortgage(){

//stringarraytoacceptwhichtermstouse

rateTxFld.setText(IntRates.getSelectedItem().toString());

doubleprinciple=Double.parseDouble(prinTxFld.getText());

doubledblrateTxFld=Double.parseDouble(rateTxFld.getText());

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if(dblrateTxFld==5.35)termTxFld.setText("7");elseif(dblrateTxFld==5.50)termTxFld.setText("15");

elseif(dblrateTxFld==5.75)termTxFld.setText("30");intinttermTxFld=Integer.parseInt(termTxFld.getText());

//Formatstheoutputofdollarfigures

DecimalFormattwo_decimal=newDecimalFormat("$0,000.00");

doublePayment;

doubleInterestPaid;doubleprinTxFldBal;

doubletemp;

intMonths;

doubleintMonthlyRate=dblrateTxFld/100;

intMonthTerm=inttermTxFld*12;Months=MonthTerm;//formulasPayment=(principle*(intMonthlyRate/12))/(1-1/Math.pow((1+intMonthlyRate/12),MonthTerm));

//convertsmonthlypaymenttodecimalformat

monthlyPayment.setText(""+(two_decimal.format(Payment)));

payAmortTA.append("MonthNo.\tMonthlyPayment\t\tLoanBalance\t\tInterest

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Payment\n");for(intcounter=0;counter

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publicstaticvoidmain(String[]args){javax.swing.SwingUtilities.invo

eLater(newRunnable()

{publicvoidrun()

{createAndShowGui();}}

);

}

}