Do I have to initialize my local variables?

[MojoMonkey]

Hello,

I'm new to Java so bear with me please . In my main method I'd have something like this:

public class Example
{
public static void main(String[] args)
{
Constructor constructor;
int var1, var2, var3;
 
constructor = new Constructor(var1, var2, var3);
 
}
} 

I'm using Eclipse and it is telling me to initalize my local variables. I want them to have no value or 0 before I use them. I can obviously set the as "= 0" when I declare them but it seems tedious, especially if I have a lot of variables.

Is there a way I can
a) make it so they don't need to be initialized?
or
b) set it so they all initialize as zero?

Thanks for any suggestions, explanations or help!

[John]

When ever you use a variable it needs to be initialized or else it will throw a null pointer exception. However you can initialize multiple variables just as you initialize a single variable:

int var1, var2, var3 = 0; 

Other than that, there is no other way to do it.

[MojoMonkey]

cool, thanks!

[satya5321]

you have to initialize the local variables if you want to use.

You maynot initialize the instance variables.

[screamest]

In the object class you could have a default constructor that initializes the variables to 0. E.g.

public class objectName {

int var1, var2, var3;

public static objectName()
{
var1 = var2 = var3 = 0;
}

public static objectName(int var1, int var2, int var3)
{
var1 = var1;
var2 = var2;
var3 = var3;
}
}