Java

import javax.swing.JFrame;

public class CarCareTest {

    public static void main(String[] args) {

        CarCare myCarCare = new CarCare();
        myCarCare.setSize(500, 500);
        myCarCare.setVisible(true);
        myCarCare.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);

    }

}

import javax.swing.JFrame;
import javax.swing.JMenu;
import javax.swing.JMenuItem;
import javax.swing.JMenuBar;
import javax.swing.JOptionPane;
import java.awt.Color;
import java.awt.FlowLayout;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.awt.event.WindowEvent;

public class CarCare extends JFrame {

    //Declare Class Variables
    private JMenuItem bronzeOil, silverOil, goldOil;
    private JMenuItem basicWash, betterWash, bestWash;
    private JMenuItem total, clear, exit;
    private int priceOilChange, priceCarWash;

    //Create Constructor
    public CarCare(){
        super("Quick Fast Car Care");

        //Instantiate Top Level Menu Items
        JMenu oilchangeMenu = new JMenu ("Oil Change");
        JMenu carwashMenu = new JMenu ("Car Wash");
        JMenu totalclearexitMenu = new  JMenu ("Total/Clear/Exit");

        //Instantiate Sub Menu Items
        bronzeOil = new JMenuItem("Bronze");
        silverOil = new JMenuItem("Silver");
        goldOil = new JMenuItem("Gold");
        basicWash = new JMenuItem("Basic");
        betterWash = new JMenuItem("Better");
        bestWash = new JMenuItem("Best");
        total = new JMenuItem("Total");
        clear = new JMenuItem("Clear");
        exit = new JMenuItem("Exit");

        //Set Layout Manager
        setLayout(new FlowLayout());

        //Add Sub Menu Items To Top Level Menu
        oilchangeMenu.add(bronzeOil);
        oilchangeMenu.add(silverOil);
        oilchangeMenu.add(goldOil);
        carwashMenu.add(basicWash);
        carwashMenu.add(betterWash);
        carwashMenu.add(bestWash);
        totalclearexitMenu.add(total);
        totalclearexitMenu.add(clear);
        totalclearexitMenu.add(exit);

        //Create Menu Bar
        JMenuBar bar = new JMenuBar();

        //Add Top Level(s) To Menu Bar
        bar.add(oilchangeMenu);
        bar.add(carwashMenu);
        bar.add(totalclearexitMenu);

        //Add Menu Bar To JFrame 
        setJMenuBar(bar);

        //Create MenuHandlerObject
        MenuHandler handler = new MenuHandler();

        //Add Event Handling Listeners
        bronzeOil.addActionListener(handler);
        silverOil.addActionListener(handler);
        goldOil.addActionListener(handler);
        basicWash.addActionListener(handler);
        betterWash.addActionListener(handler);
        bestWash.addActionListener(handler);
        total.addActionListener(handler);
        clear.addActionListener(handler);
        exit.addActionListener(handler);
    }//End Constructor

        //Display Output

    //Create Inner Class
    private class MenuHandler implements ActionListener{
        public void actionPerformed(ActionEvent event) {
            System.out.println("MenuHandler Called.");

            //Determine Oil Change & Set Price 
            if (event.getSource() == bronzeOil){
                priceOilChange = 20;}
            else if (event.getSource() == silverOil);{
                priceOilChange = 25;}
            if (event.getSource() == goldOil){
                priceOilChange = 30;}

            //Determine Car Wash & Set Price
            if (event.getSource() == basicWash) {
                priceCarWash = 5;}
            else if (event.getSource() == betterWash);{
                priceCarWash = 10;}
            if (event.getSource() == bestWash){
                priceCarWash = 15;}

            //Determine Total
            if (event.getSource() == total){
            }

            //Clear Application
            if (event.getSource() == clear){
            }

            //Exit Application
            if (event.getSource() == exit){
            System.exit(0);}

        }//End ActionPerformed Method
    }//End MenuHandler Class
}//End CarCare Class

import java.applet.Applet;
import java.awt.Button;
import java.awt.Color;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import javax.swing.JLabel;
import javax.swing.JTextField;

public class Greeting extends Applet implements ActionListener {

    JLabel labelName = new JLabel("Please enter your name.");
    JTextField textField = new JTextField(20);
    Button button = new Button("GREET");
    JLabel labelResult = new JLabel("Result goes here.");

    String userResult = "";

    public void init() {
        setSize(500, 500);
        setBackground(Color.yellow);
        add(labelName);
        add(textField);
        add(button);
        add(labelResult);

        button.addActionListener(this);
    }

    public String getText() {
        return userResult;
    }

    public void setName(String result){
        userResult = result;
    }

    public void actionPerformed(ActionEvent event) {
        if (event.getSource() == button) {
            labelResult.setText("Hello, " + userResult);
        }

    }
}

import java.util.Scanner;

public class StudentInfoTest 
{
    public static void main(String[] args) 
    {
        //Initiate scanner.
        Scanner input = new Scanner(System.in);

        //Declare Variables.
        String answer = "";
        double GPA = 0.0;

        //Create Object<br />
        StudentInfo info = new StudentInfo(null, 0, 0);

        //Prompt for and store student name.
        System.out.print("Enter student name: ");
        String name = input.nextLine();
        info.setName(name); 

        //Prompt for class credits and letter grade.
        //Loop until answer is "N".
        do 
        {
        System.out.print("Enter class credits: ");
        String credits = input.nextLine();

        System.out.print("Enter letter grade: ");
        String grade = input.nextLine();

        System.out.print("Add another class? (Y or N): ");

        answer = input.nextLine();
        }
        while (answer.equals("Y"));

        System.out.printf(name + ", Your GPA is %.2f/n.", GPA);

    }//Ends Main
}//Ends Class

public class StudentInfo {

        //Variables
        private String studentName;
        private double totalPoints;
        private double totalCredits;

        //Constructor
        public StudentInfo(String name, double points, double credits)
        {
            //Initialize Variables
            studentName = name;
            totalPoints = points;
            totalCredits = credits;
        }

        //Create "Set" Functions
        public void setName(String name)
        {
            studentName = name;
        }

        //Create "Get" Functions
        public String getName()
        {
            return studentName;
        }

            public void addClass(double credits, String grade)
            {
                double points = 0.0;

                if(grade == "A" | grade == "a")
                    points = 4.0;
                if(grade == "B" | grade == "b")
                    points = 3.0;
                if(grade == "C" | grade == "c")
                    points = 2.0;
                if(grade == "D" | grade == "d")
                    points = 1.0;
                if(grade == "F" | grade == "f")
                    points = 0.0;

                totalCredits += credits;
                totalPoints += (points * credits);

            }

            public double getGPA(double totalPoints, double totalCredits)
            {
                double GPA = 0.0;
                GPA = totalPoints / totalCredits;
                return GPA;
            }

            public static void displayStudent(String name, double GPA)
            {
            }
}//Ends Class