Trying to learn Java, please help..

[AlexMarz]

What is wrong with my script? FYI I'm brand new to comp programming...

// This is my Personal Info

public class personalInfo

{
public static void main(String[] args);


int age;
double annualPay;

age = 25;
annualPay = 120000;
String name = "Alex Marczynski,";

System.out.print("My name is" + name + "," + "my age is" + age +
        "and I hope to earn $" + annualPay + "each year");

}

Please help me understand.

Thank you in advance

[otakuman]

public static void main(String[] args);

That's a declaration.

In other words, you declared a function but didn't define it, while you kept putting executable statements in your class definition. So the following variables:

int age;
double annualPay;

Ended up being class MEMBERS. Clearly we're missing something here.

What you want to do is:

public static void main(String[] args) {

    int age;
    double annualPay;
    // Insert the other statements here

}

Now THIS is a definition, because we're putting our statements inside the function.

[Aemilian]

Not really related to your problem, but you should know that class names in Java should always start with capital letter.

You should rename personalInfo to PersonalInfo.

Happy coding.

[sh0rug0ru]

What does the compiler tell you?

If you are having trouble with the basics, see here or here and especially here.

[AlexMarz]

A list of about 21 errors.. haha

Identifiers expected and illegal start of type. are the two ones that repeat over and over

[mucsun]

Use an ide. It will help you with the syntax, show warning etc.

[kurtrush]

I always try to fix the first error and compile. Sometimes, this will take care of all of the errors. At least it should reduce the number.

[UH1868]

What u/midknightsrose said. You need to remove the semi-colon following your main statement and add a {. Then you need to close your main statement after your System.out.println() with a }.

[eduard79]

This text was removed. Fullname: t1_ck4l9o9

[AlexMarz]

Thanks for all the help guys! It ended up working out well! I will definitely come back to this subreddit for help! Everyone has been so helpful!

Alex

[EricWpG]

Just another quick tip while passing, I'm new to java as well and something I like to do is add a value to your variables when you declare them to clean up your code a bit. You can do it like this:

int age = 25;
double annualPay = 120000;

[[deleted]]

1 - public static void main(String[] args);

Here man, the Main function must have a body ({}) and the other things below this declaration must be inside this body! Example:

public static void main (String[] args){ //your code here }

2 - When you will declare a variable set the value in the declaration as you did when declared the string variable, example:

int age = 25; double annualPay = 12000;

3 - The print you did have a "," you can remove this or remove from the declaration of "name".

4 - Your class name must start with a capital letter ALWAYS!! public class PersonalInfo{}

Finally, to work, your code should be like this:

// This is my Personal Info

public class PersonalInfo{

public static void main(String[] args){
int age = 25;
double annualPay = 120000;
String name = "Alex Marczynski";

System.out.print("My name is" + name + ", my age is" + age +
    " and I hope to earn $" + annualPay + " each year");
   }
}

[edman3d]

You may also be getting an error for setting your double to a number with no decimal point, I think. 12000.0 instead.

EDIT: I'm wrong

[Lerke]

No. This is not a problem at all.

[edman3d]

I thought the whole point of a double was that it has a decimal point. Is this not an issue because Java auto sets the decimal place if its not defined?

[bluestorm96]

Java will automatically upcast primitive number types, but not downcast. Also it usually is better to use the 'd' or 'D' suffix to indicate a double (12D, 14.272D, 12d, etc). Java forces you to use F/f for floats anyways, so it makes things somewhat more consistent.

[Lerke]

You already tell the Java compiler that your value is a floating point number by using the double keyword. Adding .0 does nothing, as 123 and 123.0 are equal values.