Homework
Now, it’s time to practice! The following problem will incorporate the following concepts:
- Classes
- Constructors
- Methods
- Void methods
- Non-void methods
- Math class
Integer
andDouble
wrapper classes- String methods
public class Circle {
private double radius;
public Circle(double radius) {
this.radius = radius;
}
public double circumference() {
return 2 * Math.PI * radius;
}
public double area() {
return Math.PI * Math.pow(radius, 2);
}
public double getRadius() {
return radius;
}
}
public class Student {
private String name;
private Integer grade;
public Student(String name, Integer grade) {
this.name = name;
this.grade = grade;
}
public int nameLength() {
return name.length();
}
public Double getGradeAsDouble() {
return grade.doubleValue();
}
public double getScaledGrade() {
return grade / 2.0;
}
public String getName() {
return name;
}
public Integer getGrade() {
return grade;
}
}
Circle circle1 = new Circle(5.0);
Circle circle2 = new Circle(7.0);
System.out.println("Circle 1:");
System.out.println("Radius: " + circle1.getRadius());
System.out.println("Circumference: " + circle1.circumference());
System.out.println("Area: " + circle1.area());
System.out.println("\nCircle 2:");
System.out.println("Radius: " + circle2.getRadius());
System.out.println("Circumference: " + circle2.circumference());
System.out.println("Area: " + circle2.area());
Student student1 = new Student("Aadit", 75);
Student student2 = new Student("Emily", 45);
System.out.println("\nStudent 1:");
System.out.println("Name: " + student1.getName());
System.out.println("Name Length: " + student1.nameLength());
System.out.println("Grade: " + student1.getGradeAsDouble());
System.out.println("Scaled Grade: " + student1.getScaledGrade());
System.out.println("\nStudent 2:");
System.out.println("Name: " + student2.getName());
System.out.println("Name Length: " + student2.nameLength());
System.out.println("Grade: " + student2.getGradeAsDouble());
System.out.println("Scaled Grade: " + student2.getScaledGrade());
Circle 1:
Radius: 5.0
Circumference: 31.41592653589793
Area: 78.53981633974483
Circle 2:
Radius: 7.0
Circumference: 43.982297150257104
Area: 153.93804002589985
Student 1:
Name: Aadit
Name Length: 5
Grade: 75.0
Scaled Grade: 37.5
Student 2:
Name: Emily
Name Length: 5
Grade: 45.0
Scaled Grade: 22.5