Question

The citizens of Javaland require a program that calculates the personal income tax owed by

each taxpayer.

Write the code for a class method

calculateTaxableIncome

that accepts the following 5

inputs:



General Income



Investment Income



Other Income



Regular Deductions



Other Deductions

The method calculates the amount of a citizen’s taxable income. Taxable income is obtained

by summing all income and subtracting all deductions. Note that only 50% of Other

Deductions are tax deductible.

The signature for this method is:

public static double calculateTaxableIncome(double generalIncome, double

investmentIncome, double otherIncome, double regularDeductions,

double otherDeductions)

Note that all calculated monetary values should be rounded to 2 decimal places.

Write the code for a class method

calculateIncomeTax

that accepts the following input:

Taxable Income. The method calculates the amount of income tax due to the Government of

Javaland based on a citizen’s calculated taxable income. Income tax is calculated as a

percentage of taxable income based on the following rules:

10% on the first $20,000 of taxable income

12% on the next $20,000 of taxable income

15% on the next $20,000 of taxable income

20% on all remaining taxable income

The signature for this method is:

public static double calculateIncomeTax(double taxableIncome)

Comp 122 Assignment 03 page

2

Note that all calculated monetary values should be rounded to 2 decimal places.

Save these methods’ source code in your methods class

Answer 1

SOLUTION-
I have solve the problem in Java code with comments for easy understanding :)

CODE-

//java code

//class

public class incomeTax {

//declaration
double generalIncome;
double InvestmentIncome;
double otherIncome;
double regularDeductions;
double otherDeductions;

   public double getGeneralIncome() {
   return generalIncome;
}

public void setGeneralIncome(double generalIncome) {
   this.generalIncome = generalIncome;
}

public double getInvetmentIncome() {
   return InvestmentIncome;
}

public void setInvestmentIncome(double investmentIncome) {
   InvestmentIncome = investmentIncome;
}

public double getOtherIncome() {
   return otherIncome;
}

public void setOtherIncome(double otherIncome) {
   this.otherIncome = otherIncome;
}

public double getRegularDeductions() {
   return regularDeductions;
}

public void setRegularDeductions(double regularDeductions) {
   this.regularDeductions = regularDeductions;
}

public double getOtherDeductions() {
   return otherDeductions;
}

public void setOtherDeductions(double otherDeductions) {
   this.otherDeductions = otherDeductions;
}

   public incomeTax(double generalIncome, double investmentIncome, double otherIncome, double regularDeductions,
       double otherDeductions) {
   super();
   this.generalIncome = generalIncome;
   InvestmentIncome = investmentIncome;
   this.otherIncome = otherIncome;
   this.regularDeductions = regularDeductions;
   this.otherDeductions = otherDeductions;
}

public static double calculateTaxableIncome(double generalIncome, double investmentIncome, double otherIncome, double regularDeductions,
       double otherDeductions)
       {
   return generalIncome+investmentIncome+otherIncome-regularDeductions-(0.5*otherDeductions);
       }

   @Override
public String toString() {
   return "incomeTax [generalIncome=" + generalIncome + ", InvestmentIncome=" + InvestmentIncome + ", otherIncome="
           + otherIncome + ", regularDeductions=" + regularDeductions + ", otherDeductions=" + otherDeductions
           + ", getGeneralIncome()=" + getGeneralIncome() + ", getInvetmentIncome()=" + getInvetmentIncome()
           + ", getOtherIncome()=" + getOtherIncome() + ", getRegularDeductions()=" + getRegularDeductions()
           + ", getOtherDeductions()=" + getOtherDeductions() + "]";
}

   public static void main(String[] args) {
       // TODO Auto-generated method stub

       incomeTax I =new incomeTax(5400,7800,8000,4500,5300);
       double taxableIncome=I.calculateTaxableIncome(5400,7800,8000,4500,5300);
       double incometax;
       if (taxableIncome<=20000)
           incometax=10*taxableIncome/100;
       else if(taxableIncome>=20000 && taxableIncome<=40000)
           incometax=20*taxableIncome/100;
       else if(taxableIncome>=40000 && taxableIncome<=60000)
           incometax=15*taxableIncome/100;
       else
           incometax=20*taxableIncome/100;
       System.out.println(I.toString());
       System.out.println("Income taax to be paaid to the government is "+incometax);
   }

}

OUTPUT:
incomeTax [generalIncome=5400.0, InvestmentIncome=7800.0, otherIncome=8000.0, regularDeductions=4500.0, otherDeductions=5300.0, getGeneralIncome()=5400.0, getInvetmentIncome()=7800.0, getOtherIncome()=8000.0, getRegularDeductions()=4500.0, getOtherDeductions()=5300.0]
Income taax to be paaid to the government is 1405.0

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