Answer the following questions:

• What task or tasks is the problem asking my code to perform?
• What program logic must I perform?
• What steps am I going to take to solve the programming problem?

Using the answers to the questions above, write the program by following the steps below:

1. define the class
2. write the stub for method main
3. using the println( ) method write the following text to the console window: Welcome to Java!
4. compile the code
5. make any necessary adjustments or corrections
6. save and recompile the code
7. run the program

                        
public class Welcome
{
   public static void main(String [] args)
   {
      System.out.println("Welcome to Java!");
   }
}
  

Welcome to Java!

Write a Java program named DataValues.

The program is to do the following:

1. declare three variables of type int named num1, num2 and intSum each variable is initialized to the value 0
2. declare three variables of type double named dbl1, dbl2 and dblDifference each variable is initialized to 0.0
3. declare a variable of type char named firstChar initialized to ‘a’;
4. declare a variable of type String named str initialized to null.

Next, the program will do the following:

1. assign the value 7 to num1 and the value 12 to num2;
2. add num1 and num2 and store the resulting value in sum;
3. display the value stored in sum using the following message: 7 added to 12 is 19

note: only variables may be used to generate the output statement

Continuing, the program will then do the following with the values of type double:

1. initialize dbl1 to 7.3, dbl2 to 75.45
2. storing the difference in dblDifference.
3. display each value using the following statement: The difference of 7.3 less 75.45 is ………

note: only variables may be used to generate the output statement.

Finally, the program will do the following:

1. display the value stored in firstChar;
2. assign the value Z to firstChar;
3. display the value now in firstChar.
4. display the value stored in str;
5. assign the message Welcome to CS200 to the variable str;
6. display the current value in str.

Answer the following questions:

• What task or tasks is the problem asking my code to perform?
• What variable or variables must I declare?
• What program logic must I perform?
• What steps am I going to take to solve the programming problem?

Using the answers to the questions above, write the program by following the steps below:

1. define the class
2. write the stub for method main
3. declare the variables to be used within the program
4. provide the required program logic
5. compile the code
6. make any necessary adjustments or corrections
7. save and recompile the code
8. run the program

                        
public class DataValues
{
   public static void main(String [] args)
   {
      //variable declaration
      int num1 = 0;
      int num2 = 0;
      int intSum = 0;
      
      double dbl1 = 0.0;
      double dbl2 = 0.0;
      double dblDifference = 0.0;
      
      char firstChar = 'a';
      
      String str = null;
      
      boolean isTrue = false;
      
      //program logic
      num1 = 7;
      num2 = 12;
      intSum = num1 + num2;
      
      System.out.println(num1 + " added to " +
                           num2 + " is " + intSum);  
                                 
      //variable assignment
      dbl1 = 7.3;
      dbl2 = 75.45;
      dblDifference = dbl1 - dbl2;
      
      System.out.println("The difference of " + dbl1 +
                         " less " + dbl2 + 
                         " is " + dblDifference);
      
      System.out.println(firstChar);
      firstChar = 'Z';
      System.out.println(firstChar);
      
      System.out.println(str);
      str = "Welcome to CS200";
      System.out.println(str);
      
      System.out.println(isTrue);
      isTrue = true;
      System.out.println(isTrue);
      
   }

}
  

7 added to 12 is 19
The difference of 7.3 less 75.45 is -68.15
a
Z
null
Welcome to CS200
false

Write a Java program that prompts the user to enter a number of seconds.

The program is to output the total number of seconds entered by the user as days, hours, minutes and remaining seconds.

Please use the following information to arrive at the program output:

• There are 86400 seconds in one 1 day;
• There are 3600 seconds in one hour;
• There are 60 seconds in one minute.

Answer the following questions:

• What task or tasks is the problem asking my code to perform?
• What variable or variables must I declare?
• What program logic must I perform?
• What steps am I going to take to solve the programming problem?

Using the answers to the questions above, write the program by following the steps below:

1. define the class
2. write the stub for method main
3. declare the variables to be used within the program
4. provide required user prompt and data storage
5. provide the required program logic
6. compile the code
7. make any necessary adjustments or corrections
8. save and recompile the code
9. run the program

                        
import java.util.Scanner;

public class TimeCalculator
{
   public static void main(String [] args)
   {
      //variable declaration
      int totalSeconds = 0;
      int days = 0;
      int hours = 0;
      int minutes = 0;
      int remainingSeconds = 0;
      
      final int DAY = 86400;
      final int HOUR = 3600;
      final int MINUTE = 60;
      
      Scanner kbd = new Scanner(System.in);
      
      //user prompt
      System.out.println("Enter the total number of seconds: ");
      totalSeconds = kbd.nextInt();
      
      //program logic
      remainingSeconds = totalSeconds; //temporary storage for current secs
      
      days = remainingSeconds/DAY;
      remainingSeconds = remainingSeconds % DAY;
      
      hours = remainingSeconds/HOUR;
      remainingSeconds = remainingSeconds % HOUR;
      
      minutes = remainingSeconds/MINUTE;
      remainingSeconds = remainingSeconds % MINUTE;
      
      //program output
      System.out.println("In " + totalSeconds + " seconds, there is/are " +
                         "\n" + days + " day(s), " +
                         "\n" + hours + " hour(s), " +
                         "\n" + minutes + " minute(s), and " + 
                         "\n" + remainingSeconds + " seconds(s).");
   
   }
}
  

Enter the total number of seconds: 
86459
In 86459 seconds, there is/are 
1 day(s), 
0 hour(s), 
0 minute(s), and 
59 seconds(s).


Enter the total number of seconds: 
3659
In 3659 seconds, there is/are 
0 day(s), 
1 hour(s), 
0 minute(s), and 
59 seconds(s).


Enter the total number of seconds: 
69
In 69 seconds, there is/are 
0 day(s), 
0 hour(s), 
1 minute(s), and 
9 seconds(s).