Answer:
To create the `WeatherData` class with the required methods and functionality, follow these steps:
1. Define the `WeatherData` class with the necessary instance variables to store the daily temperature and wind speed:
```java
public class WeatherData {
private float dailyTemp;
private int windSpeed;
// Rest of the class implementation
}
```
2. Create the default constructor, `WeatherData()`, which initializes the instance variables to default values:
```java
public WeatherData() {
dailyTemp = 0.0f;
windSpeed = 0;
}
```
3. Implement the overloaded constructor, `WeatherData(float dailyTemp, int windSpeed)`, to allow setting the initial values of the instance variables:
```java
public WeatherData(float dailyTemp, int windSpeed) {
this.dailyTemp = dailyTemp;
this.windSpeed = windSpeed;
}
```
4. Implement the mutator methods, also known as set methods, to modify the values of the instance variables:
```java
public void setDailyTemp(float newTemp) {
dailyTemp = newTemp;
}
public void setWindSpeed(int newWindSpeed) {
windSpeed = newWindSpeed;
}
```
5. Implement the accessor methods, also known as get methods, to retrieve the values of the instance variables:
```java
public float getDailyTemp() {
return dailyTemp;
}
public int getWindSpeed() {
return windSpeed;
}
```
6. Create the `toString()` method to return a string representation of the `WeatherData` object's data:
```java
public String toString() {
return "Daily Temperature: " + dailyTemp + "°C, Wind Speed: " + windSpeed + " mph";
}
```
7. Implement the `equals()` method to compare `WeatherData` objects for equality based on their instance variables:
```java
public boolean equals(Object obj) {
if (this == obj) {
return true;
}
if (obj == null || getClass() != obj.getClass()) {
return false;
}
WeatherData other = (WeatherData) obj;
return dailyTemp == other.dailyTemp && windSpeed == other.windSpeed;
}
```
With the `WeatherData` class implemented as described above, you have created a class that can store information about daily weather conditions for NASA. The class includes a default constructor, overloaded constructor, mutator methods, accessor methods, a `toString()` method, and an `equals()` method to provide the required functionality.