Why I can't convert a String to int?

Question

I'm very new in Java. I've a problem. I have the String currentTime with a value of the current time like this: "2204201810". I want to convert this String to an Integer. The Error is:

Caused by: java.lang.NumberFormatException: For input string: "2204201804"

But I don't know why Java can't convert it. I mean the String contains just Numbers not more.

Here is my code:

GregorianCalendar now = new GregorianCalendar();
DateFormat df = DateFormat.getDateInstance(DateFormat.SHORT);

df = DateFormat.getDateTimeInstance(DateFormat.SHORT, DateFormat.SHORT);
String currentTime = df.format(now.getTime());

currentTime = currentTime.replace(".", "");
currentTime = currentTime.replace(" ", "");
currentTime = currentTime.replace(":", "");
try {
    int currentTimeInt = Integer.valueOf(currentTime);
} catch (NumberFormatException ex) {
    //Error
}

Answer 1

The value you are trying to convert to int (2204201804) exceeds the maximum integer capacity, which is 2147483647 in Java. Try using long instead. Or maybe even BigInteger , depending on your needs.