CHAPTER 1 ASSIGNMENT - LEARN JAVA BY EXAMPLE

Exercise 1 :
Write an application that accepts a string as name of someone from command line arguments then print out “Hello ”+name.

Hint : String name = args[0];

Exercise 2 :
Write an application that accepts two numbers from command line arguments then calculate the total of these numbers and print out.

Hint : int a,b;
a = Integer.parseInt(args[0]);
b = Integer.parseInt(args[1]);

Exercise 3 :
Write an application that accepts a number as radius of a circle. Calculate the perimeter and area of this circle and print out the result.

Hint :
r = Double.parseDouble(args[0]);

Perimeter : P = 2 * Math.PI *r ;
Area: S = Math.PI * r * r;

Exercise 4 :
Write an application that accepts three numbers. Then check them are edge of a triangle or not.
Hint:

Perimeter: P = a + b + c
Area: S = Math.sqrt(p*(p-a)*(p-b)*(p-c)) where: p = (a+b+c)/2

Exercise 5 :
Write an application that accepts three numbers as three edge of a triangle. Then calculate the perimeter and area of this circle and print out the result.

Hint : r = Math.sqrt(x); Math.PI

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