关于java：嵌套的If / Else语句

Nested If/Else Statements

很抱歉再次编辑此内容，但我不想再发表任何文章了，我想我会在这里提出。

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public static void main(String[] args)
{
// TODO code application logic here

char response = 0;
double grossAnnualIncome = 0.0;
double annualTuition = 0.0;
double annualCharity = 0.0;
double homeMortgage = 0.0;
double healthCredit = 0.0;
double annualAfterTaxes = 0.0;
double monthlyAfterTaxes = 0.0;
double taxAt17 = 0.0;
double taxableIncome = 0.0;
double ans1 = 0.0;

Scanner input = new Scanner(System.in);

System.out.printf("Please enter your gross annual income or 0 for none:" );
grossAnnualIncome = input.nextDouble();

if( grossAnnualIncome > 0 )
{
System.out.printf("Please enter your annual tuition and expenses for higher education or 0 for none:");
annualTuition = input.nextDouble();

System.out.printf("Please enter your annual charitable contributions or 0 for none:");
annualCharity = input.nextDouble();

System.out.printf("Please enter the annual interest paid for your home mortgage or 0 for none:");
homeMortgage = input.nextDouble();
input.nextLine();

System.out.printf("Did you purchase health insurance through your employer or outside the workplace?"
+" Enter 'Y' or 'N':");
response = input.nextLine().charAt(0);

if( Character.toUpperCase(response) == 'Y' )
{
System.out.printf("Are you filing as a family? Enter 'Y' or 'N':");
response = input.nextLine().charAt(0);

if ( Character.toUpperCase(response) == 'Y' )
{
healthCredit = 3500;
}
else
{

if( Character.toUpperCase(response) == 'N' )
{
System.out.printf("Are you filing as single? Enter 'Y' or 'N':");
response = input.nextLine().charAt(0);
}
if( Character.toUpperCase(response) == 'Y')
{
healthCredit = 2000;
}

}

}
else
{
healthCredit = 0;
}

taxableIncome = grossAnnualIncome - homeMortgage - annualTuition - annualCharity - healthCredit;
taxAt17 = taxableIncome * .17;
annualAfterTaxes = grossAnnualIncome - taxAt17;
monthlyAfterTaxes = annualAfterTaxes / 12;
ans1 = homeMortgage + annualTuition + annualCharity + healthCredit;

System.out.printf("\
YOUR TAXES\
\
"
+"Gross Annual Income: %,.0f\
\
"
+"Deductions: \
"
+"\\tHigher Education: %,.0f\
"
+"\\tCharitable Contributions: %,.0f\
"
+"\\tHome Mortgage Interest: %,.0f\
"
+"\\tHealth Insurance Tax Credit: %,.0f\
\
"
+"Tax at 17%%: %,.0f\
"
+"Annual Income After Taxes: %,.0f\
"
+"Monthly Income After Taxes: %,.0f", grossAnnualIncome, annualTuition, annualCharity,
homeMortgage, healthCredit, taxAt17, annualAfterTaxes, monthlyAfterTaxes);

}

if( grossAnnualIncome <= 0 )
{
System.out.printf("You earned no income so you owe no taxes!" );
}

System.exit(0);
}

}

我的两个输出都是正确的，但是我在最后一个输出上遇到了麻烦。

我的最后一个输出需要读为"您欠税$ 0.00！"

当我编写代码时：

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if (grossAnnualIncome <= ans1)
{
System.out.printf("YOU OWE $0.00 IN TAXES!" );
}

它显示了GrossAnnualIncome> 0输出中的所有内容。