Please explain static void and void methods are ?

[shavindra]

I know void means a that a value does not have a return in a method . but according to this site( Java - Methods) example it returns a value of C .Please explain this to me if I'm wrong. and please explain what is static void means with examples .

Below is the void method example from the site


public class TestVoidMethod {

public static void main(String[] args) {
printGrade(78.5);
}

public static void printGrade(double score) {
if (score >= 90.0) {
System.out.println('A');
}
else if (score >= 80.0) {
System.out.println('B');
}
else if (score >= 70.0) {
System.out.println('C');
}
else if (score >= 60.0) {
System.out.println('D');
}
else {
System.out.println('F');
}
}
}

C

[Wnt2bsleepin]

It does not return anything, it just prints it out.

[Russd772]

a returned value is distinct because it will be a method that has the word return in it, then what happens is when that method is called is equals the return value, i hope im saying that right.

public class ReturnExample {

public int x = 10;
public int returnMethod(){
return x;
}
   }

with the returnMethod() when you call this method in your main arg class you would see something like this

public static void main(String[] args){

private int z;

ReturnExample test = new ReturnValue;

z = test.returnMethod();
System.out.println(z);

}

so what will happen is you will have assigned the value of x in your ReturnExample class to z in your main class, then you print it out it will just print out the value of 10.

a static variable just means it is the same for every object you create of that class, so if you have a value you want associated with every object in a class you would call it static, you can change a static value but when you do it changes for all objects of that class. unlike a non-static variable that when you change of one object it effects only that object.

i hope that clears it up a bit for you, and the code was just free typed so it may not be 100% correct but was mostly for the sake of explanation.

Russ

[Sierra]

ReturnExample test = new ReturnValue;
->
ReturnExample test = new ReturnValue();

EDIT: private int z; will throw you an error probably as private is meaningless inside a method...

[Russd772]

yeah sorry, im still pretty new myself and rely alot on the IDE to catch noob mistakes that i make, but i thought i could try and shed a little light on this. noticed i created the class object wrong also, should probably be:

ReturnExample test = new ReturnExample();

not value.

sorry if i caused the OP any more confusion on the topic.

Russ

[Army]

Are you doing a K12 class? I remember doing something similar to this.