Phils Path to Learning Java

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Good luck. The best way to learn is by practice.

 

Thanks for the support man!

Currently still editing in Modules since I posted this when I am currently on Mod 7, trying to get the thread up-to-date

 

Hey, glad to see someone else is taking an interest in Java
If you ever get stuck, feel free to ask me for help. (I'm a fairly experienced Java programmer.)

Also, ewwwwwwww. BlueJ.

 

Thanks man, if I ever get stuck I'll shoot you a PM.

 

Good luck. Although i'm not so sure about the blue jay IDE :S Unless your course requires it you should look into an IDE like Eclipse.

 

I plan on switching over soon, just wanted it at the start because most of the examples and explanations were in BlueJ so having it made it a lot easier to understand.

 

Got thread up-to-date.

Started Static methods last night, hoping to finish 7.01 assigemt tonight

 

luck dood, looks good

 

Thanks man

 

Finished 7.01

7.01 - Java's Math Class - Assignment: Write a program to calculate the (x, y) coordinates of points on a circle of radius 1.0. -

Spoiler: Source Code + Output

Code:

public class PointsOnACircleV1
{
   public static void main(String[ ] args)
   {
       double radius = 1.0;
       double x1 = 1.00;
       double y1 = 0.00;
       double y2 = 0.00;
       
       System.out.println("  Points on a Circle of Radius 1.0");
       System.out.printf("%5s %7s %11s %7s \n", "x1", "y1","x1","y2");
       System.out.println(" ----------------------------------");
       
       for (int i = 0; i < 21; i++)
       {
          System.out.printf("%6.2f %7.2f %11.2f %6.2f \n", x1, y1, x1, y2);
          x1 -= .1;
          
          y1 = radius - Math.pow(x1,2);
          y1 = Math.sqrt(y1);
          
          y2 = radius - Math.pow(x1,2);
          y2 = -(Math.sqrt(y2));
        }
    } 
}

Output:

 

I've tried learning Java to make my own RSPS, failed a few times.

Anyways, I'm looking forward to your progress. Good luck.

 

Thanks man

 

Finished 7.02

7.02 - Defining New Static Methods Part one - Assignment: A program to convert to and from English and metric units of measurement. -

Spoiler: Source Code + Output

Code:

public class MeasurementConverterV2
{
    //Purpose of program
    public static void printPurpose( )  //notice that this method is void, nothing is returned
    {
        System.out.println("This program converts to and from");
        System.out.println("English and metric units of measure.");
        System.out.println("=====================================");
    }
        
    //convert feet to miles
    //the ft parameter receives the value of the feet argument passed from main method. 
    public static double convertFeetToMiles(double ft)
    {
        return ft / 5280;      
    } 
    
    //convert miles to feet
    public static double convertMilesToFeet(double mi)
    {
        return mi * 5280;      
    } 
    
    //convert miles to kilometers
    public static double convertMilesToKilometers(double mi)
    {
       return mi * 1.60934; //return statement calculate kilometers goes here      
    } 
    
    //convert kilometers to miles
    public static double convertKilometersToMiles(double km)
    {
        return km * 0.621371; //return statement to calculate miles goes here     
    } 
    
    //convert pounds to kilograms
    public static double convertPoundsToKilograms(double lb) //method header to convert pounds to kilograms goes here
    {
        return lb * 0.453592;//return statement to calculate kilograms goes here    
    } 
    
    //convert kilograms to pounds
    public static double convertKilogramsToPounds(double kg)// method header to convert kilograms to pounds goes here
    {
        return kg * 2.20462; //return statement to calculate pounds goes here     
    } 
    
    //convert gallons to liters
    public static double convertGallonsToLiters(double gl) //method header to convert pounds to kilograms goes here
    {
        return gl * 3.78541;    
    } 
    
    //convert liters to gallons
    public static double convertLitersToGallons(double li)// method header to convert kilograms to pounds goes here
    {
        return li * 0.264172;     
    } 
    
    
        
    public static void main(String[ ] args)
    {
        //local variables
        //double miles, feet, inches, pounds, gallons;
        //double kilometers, kilograms, liters;
        
        //variable declaration and initialization
    
        printPurpose();                                    //invoke the printPurpose() method
        double feet = 6230;
        double miles = convertFeetToMiles(feet);            //invoke the convertFeetToMiles() static method and pass the feet variable as an argument
        System.out.printf("%8.1f ft. = %7.1f mi. %n", feet, miles);
        
        miles = 1.9;
        feet = convertMilesToFeet(miles);
        System.out.printf("%8.1f mi. = %7.1f ft. %n", miles, feet);
        
        miles = 22.3;
        double kilometers = convertMilesToKilometers(miles);
        System.out.printf("%8.1f mi. = %7.1f km. %n", miles, kilometers);
        
        kilometers = 1000.0;
        double kmToMiles = convertKilometersToMiles(kilometers);//call method to convert kilometers to miles goes here
        System.out.printf("%8.1f km. = %7.1f mi. %n", kilometers, kmToMiles);
        //print results goes here
        
        double pounds = 204;
        double lbToKg = convertPoundsToKilograms(pounds);//call method to convert pounds to kilograms goes here
        System.out.printf("%8.1f lb. = %7.1f kg. %n", pounds, lbToKg);
        //print results goes here
       
        double kilograms = 98.0; //declare and initialize the kilograms variable goes here
        double kgToLb = convertKilogramsToPounds(kilograms); //call method to convert kilograms to pounds goes here
        System.out.printf("%8.1f kg. = %7.1f lb. %n", kilograms, kgToLb);
        //print results goes here
        
        double gallons = 55.0;
        double gallonsToLiters = convertGallonsToLiters(gallons);
        System.out.printf("%8.1f gl. = %7.1f li. %n", gallons, gallonsToLiters);
        
        double liters = 2.0;
        double litersToGallons = convertLitersToGallons(liters);
        System.out.printf("%8.1f li. = %7.1f gl. %n", liters, litersToGallons);
           
    }//end of main method
    
}//end of class

Output:

 

You're making some nice progress , good luck.

 

Thanks for the support man

 

No problem man, im always here to support anyone who needs it.:'(

 

Trying to get 7.03 done tonight or early tomorrow

 

Its supported by Oracle and used by many Universities. Its actually a really handy tool for creating documentations.

You should take a look at the Java documentation provided by Oracle, its really good for in-depth learning!

 

Just finished up challenge program for Module 7, starting Module 8 soon.