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Exercise 1

1. Create a new Java file named exercise1 and add it to the lab1 project.2. Copy the following program into the file exercise1.

1. Compile the above program (Build Compile ile! and correct the errors if any generated.

2. "f you obtain #Process completed$ in the Build window% then run your program to obtain thefollowing output&

class irst'rogram

public static void main()tring*+ args!

int answer,

)ystem.out.println(-ello reader.-!,

)ystem.out.println(-/elcome to Java.-!,)ystem.out.println(-0ets demonstrate a simple calculation.-!,

answer 2 3 2,

)ystem.out.println(-2 plus 2 is - 3 answer!,

4

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Exercise 2

1. Create a new Java file named exercise2 and add it to the lab1 project.2. Complete the following code to answer the next 5uestions.

a. 6eclare three variables int x% double y% and float 7.

b. "nitiali7e the three variables above (x 8% y 2.9% and 7 :.2!.c. 6isplay the result of each of the following arithmetic expressions using a )ystem.out.println ( !statement. "n the Interpretation column% find out the precedence rules discussed in the lecture.

Arithmetic Expression Result Interpretation

x 3 y ; 7

x < y ; 7

x < 2 3 y < 2

x < 2

x = 2

x = : ; 9 3 1

(y 3 9! ; 2

7 < (1 3 1!

9. 6eclare an int variable i initiali7e it to >% and then test the following increment and decrementstatements. Comment on the obtained output.

? University of Hail Department of ComputerScience and Software Engineering Statement

Output Comments

)ystem.out.println (33 i!,

)ystem.out.println (i!,

)ystem.out.println (i33!,

)ystem.out.println (i!,

)ystem.out.println (@@i!,

)ystem.out.println (i@@!,

)ystem.out.println (i!,

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Ahis is a geometry calculator

Choose what you would lie to calculate1. ind the area of a circle2. ind the area of a rectangle9. ind the area of a triangle>. ind the circumference of a circle:. ind the perimeter of a rectangleN. ind the perimeter of a triangleMnter the number of your choice&

N

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import java.util.)canner,

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width eyboard.next6ouble(!,

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)ystem.out.println(-Gou did not enter a valid choice.-!,4

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import java.util.Scanner;

public class temp{

public static void main(String[] args){

Scanner keyboard = new Scanner(System.in);

double celsius;

System.out.println("Input Celsius ");celsius = keyboard.nextDouble();

double c= fahrenheit(celsius);System.out.println("The equivalent Fahrenheit is "+c);

}

public static double fahrenheit(double num1){double c = ((num1*9)/5) + 32;return c;

}}

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