Computer Science 2

1. What is a Javadoc tag
2. When and how to use the @author tag
3. When and how to use the @version tag
4. When and how to use the @param tag
5. When and how to use the @return tag
6. When and how to use the @see tag

public class TaxCalculator{
    private double tax;  // the amount of tax due

    // annual income in dollars
    private final double LEVEL_1_INCOME = 10_000.00;
    private final double LEVEL_2_INCOME = 50_000.00;
    private final double LEVEL_3_INCOME = 100_000.00;

    private final double TAX_RATE_1 = 0.10; // % of income
    private final double TAX_RATE_2 = 0.15; // % of income
    private final double TAX_RATE_3 = 0.20; // % of income
    private final double TAX_RATE_4 = 0.30; // % of income

    public TaxCalculator( ){
	tax = 0.0;
    }

    /*
     * Returns the amount of tax due:
     * if income is less than $10,000, 10% of income
     * if income is less than $50,000, 15% of income
     * if income is less than $100,000, 20% of income
     * otherwise, 30% of income
     */
    public double getTax( double income ){
	if( income < LEVEL_1_INCOME ){
	    tax = income * TAX_RATE_1;
	}else if( income < LEVEL_2_INCOME ){
	    tax = income * TAX_RATE_2;
	}else if( income < LEVEL_2_INCOME ){
	    tax = income * TAX_RATE_3;
	}else{
	    tax = income * TAX_RATE_4;
	}
	tax = Math.round(tax * 100.0) / 100.0; // round to 2 decimal places
	return tax;
    }
}