How to convert int to hex in java?

Anonymous User 2809 16 Oct 2014

I have the following code.

int Val = -32768;
String Hex = Integer.toHexString(Val);

This equates to ffff8000.

int FirstAttempt = Integer.parseInt(Hex, 16); // Error "Invalid Int"
int SecondAttempt = Integer.decode("0x" + Hex);  // Error "Invalid Int"

So, initially, it converts the value -32768 into a hex string ffff8000, but then it can't convert the hex string back into an Integer.

In.Net it works as I'd expect, and returns -32768.

I know that I could write my own little method to convert this myself, but I'm just wondering if I'm missing something, or if this is genuinely a bug?

Ask by Anonymous User

Updated 16 Oct 2014

1 Answers

Anonymous User 16 Oct 2014

It overflows, because the number is negative.

Try this and it will work:

int n = (int)Long.parseLong("ffff8000", 16);

Markdown for AI

A clean, structured version of this page for AI assistants and LLMs.

Open .md

forum

How to convert int to hex in java?

Can you answer this question?

1 Answers