How can I parse String to int with the default value?

java string integer default-value parseint
Krunal picture Krunal · Aug 3, 2017 · Viewed 14.4k times · Source

I need to parse a string user id into integer for that I used Integer.parseInt(String s) but it returns null/nil, if there string has/holds non-decimal/integer value and in that case, I need to assign default integer value as 0.

I tried this but it (? 0) seems not working and I don't know whether it is correct syntax or not.

String userid = "user001";
int int_userid = Integer.parseInt(userid) ? 0;

How can assign default value to integer if there is null assignment?

String userid is a parameter argument as part of web service function call, so I cannot update it's data type to integer.

Answer

msfoster picture msfoster · Aug 3, 2017

You're most likely using apache.commons.lang3 already:

NumberUtils.toInt(str, 0);

Related questions

Converting a string to an integer on Android

How do I convert a string into an integer? I have a textbox I have the user enter a number into: EditText et = (EditText) findViewById(R.id.entry1); String hello = et.getText().toString(); And the value is assigned to the …

Read More
Converting List<Integer> to List<String>

I have a list of integers, List<Integer> and I'd like to convert all the integer objects into Strings, thus finishing up with a new List<String>. Naturally, I could create a new List<String&…

Read More
Integer.valueOf() vs. Integer.parseInt()

Aside from Integer.parseInt() handling the minus sign (as documented), are there any other differences between Integer.valueOf() and Integer.parseInt()? And since neither can parse , as a decimal thousands separator (produces NumberFormatException), is there an already available Java method …

Read More