Java for Fucking Idiots: Learn the Basics of Java Programming Without any experience!

"Alpha"
;
if
(StringHelpers.
startsWithA
(myString)) {
System.
out
.println(
"It starts with A."
);
}
In general, you don’t want to make a method static unless it’s some simple
helper methods like these. You’re in an object-oriented language, it’s a good
idea to use objects and their methods, not static methods on classes.
Note: some people would call these static methods “functions .” The
difference between methods and functions is mostly a pissing match
between programmers. Typically, I’m pretty sure methods are just functions
that are attached to objects. And since Java is highly object-oriented, we
typically call them methods.
Parameters and Arguments

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Methods can have data passed to them when they’re called. We’ve already
seen this a few times, but I should probably cover this explicitly, too. Call it
a moral obligation…
class
Airplane {
void
fly() {
}
}
That method 
fly
has 0 parameters . There’s nothing inside the parentheses ()
of this method definition. You could simply call it like this:
Airplane airplane =
new
Airplane();
airplane.fly();
Let’s add a parameter so we can specify what altitude we fly at.
void
fly(
int
altitude) {
}
Now the method has 1 parameter: 
altitude
. When you call this method, you
can “pass” the altitude to the method, and the method can use it to fly to the
desired altitude.
airplane.fly(
15000
);
Make sense?? Remember when we could pass things to a constructor?
Same thing with methods!
Okay…so that’s a parameter. Something we can put in our method
definition so that we get data passed to it when it’s called.
But what’s an argument ?
Well, it’s the other side of the coin.
When you’re typing out your method and specify what can be passed to it,
you are specifying a method’s parameters . 

---

When you actually call the method and pass something to it, you pass an