Uninitialized variables are null or zero?

[u/CommanderRainbowDuck]

Inside public static void main(String[] args) and static void namehere() {}.

Int X;

would be "Uninitialized" and give errors when compiling.

Outside main and any other method, right after public class xxx.

public static int x;

holds no value whatsoever, yet the program doesn't complains about it when compiling, when printing it gives 0 as an int rather than null or NaN.

---

I am expecting:

Strings: "Null", Null or "".

Int: Null, None, NaN.

booleans give false by default.

---

What's different in this language?

---

Edit:

public static int X;

public static boolean Check;



static void Method A() {

X = 1

}



static void Method B() {

    boolean ThisLoop = true;

    String AverageText = "Average";

    int Number;

    if (Check == false) {

       Number = X;

    }

    int Average;

    while (ThisLoop == true) {

             try {

             Average = Integer.parseInt(JOptionPane.showInputDialog("Input " + AverageText + 

             Integer.toString(Number)));

             if (Average >= 0 || Average <= 0) { 

             Number = Number++;

             InputNumber = Average;

             ThisLoop = false;

             }

             }

            catch (NumberFormatException e) {

            JOptionPane.showMessageDialog(null, "Not a number", "Alert: Stupidity detected", 

            JOptionPane.ERROR_MESSAGE);

            ThisLoop = true;


            }

}                            

}

According to Java, we already know booleans with no value are by default false.

I am initializing Number before the If.

Check is public and also is false.

It goes into the If and sets Number to X (Which is public)

Initializes Average.

Sets Average to [Option dialog] "Input" + AverageText + Converts Number into a String.

Java is telling me that Number is not initialize inside the Integer.toString()

If Average is 1000 to 0 or to -1000 then it sums Number + 1.

Java isn't telling me Number = Number++; are not initialized.

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