北邮国际学院大二Java实验-lab1

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Therefore, calling the program as follows:

java WeekDayConverter 4

will output:

The 4th day of the week is Thursday.

3. Write a program to calculate your BMI and give weight status. Body Mass Index (BMI) is an internationally used measurement to check if you have a healthy weight for your height. The metric BMI formula accepts weight in kilograms and height in metres, as follows:

BMI = weight(kg)/height 2(m 2)

BMI Weight Status categories’ table: BMI range – kg/m 2 Category

< 18.5

Underweight 18.5 – 24.9

Normal 25 – 29.9

Overweight ≥ 30 Obese

Use the command line arguments to give weight in kilograms and height in centimetres. For example:

java BMICalculator 80 175

should output:

Your weight: 80 kg

Your height: 1.75 m

Your BMI: 26.12

You are in the Overweight range.

Hint : The data you read from the command line argument is of type String , and to convert a String to an int , you must use the Integer.parseInt()

method; e.g. int anInt = Integer.parseInt(aString);

4. Below is a Java program that uses a while loop:

i) Write a new version of the program above using a do-while loop and name its file

DoublingNumbers1.java .

ii) Write a new version of the program above using a for loop and name its file

DoublingNumbers2.java .

Note : The three programs must have the same output.