Person.java

class Person {
public static void printData(String name, int age, double height, double weight) {
System.out.println("私の名前は" + name + "です");
System.out.println("年齢は" + age + "歳です");
System.out.println("身長は" + height + "mです");
System.out.println("体重は" + weight + "kgです");
double bmi = bmi(height, weight);
System.out.println("BMIは" + Math.round(bmi) + "です");

if (isHealthy(bmi)) {
  System.out.println("標準値です");
} else {
  System.out.println("標準値の範囲外です");
}

}

public static String fullName(String firstName, String lastName) {
return firstName + " " + lastName;
}

public static String fullName(String firstName, String middleName, String lastName) {
return firstName + " " + middleName + " " + lastName;
}

public static double bmi(double height, double weight) {
return weight / height / height;
}

public static boolean isHealthy(double bmi) {
return bmi >= 18.5 && bmi < 25.0;
}
}