Homework - JOption input validation

import javax.swing.*;

public class Week04_InternetServiceProvider_michaelBrooks {

	
	public static void main(String[] args) {
		String input;
		String internetType;
		double hours = 0;
		double overages = 0;
		double internetPlanA = 9.95;
		//double internetPlanB = 13.95;
		//double internetPlanC = 19.95;
		
		
		input = JOptionPane.showInputDialog("What type of internet package do you you have? Enter A, B or C").toUpperCase();
		internetType = input;
		
		input = JOptionPane.showInputDialog("How many hours did you use?");
		hours = Double.parseDouble(input);
		
		if (internetType == "A"){
			if (hours >10) {
				overages = hours - 10;
				overages *= 2;
				internetPlanA += overages;
			}
		
			JOptionPane.showMessageDialog(null, "Your total monthly bill is: $" + internetPlanA);
		}
				
		System.exit(0);
	
		
	}
		
}

		if (internetType == "A"){

		if (internetType.equals("A")){