problem with a simple java code

[boy22]

I'm doing a simple java program, when I try to compile it, the eclipse says that age isn't initialized
this is my code, please check it out

Code:

public class First
{


public void calculate()
{
int age;

if(age!= 0)
{
System.out.println(age)
}

else
{
System.out.println("you can't enter 0 as age")
}
}

[shanePreater]

yep the line where you have:

Code:

int age;

This is simply showing the compiler that you will using a variable called 'age' and it is of type int but not what the actual age is you need to modify this line to something like:

Code:

int age = 29;

This decalres it (as above) and then the = 29 bit sets age to be 29, obviously you can change this to any integer value you like.

Hope this helps

[yiweiang]

Hi,

Shane Preater's method will solve this problem. But the importance of this issue is... variables declared inside of your methods ALWAYS need to be initialized before use. Otherwise a compiler error will result. However, that cannot be said for class variables. Those do not have to be declared before use.

Yi Wei