在java中将英特尔十六进制字符串转换为普通十六进制

Question

I have a string that is in intel hex format and it needs to be converted to hex format and then from there to decimal. The data is sent from a gps device.

This is the result I should get

Intel hex  : 85630800 (input)

device hex : 00086385 

decimal    : 549765 

How can I get this ?

I have tried to convert intel hex to binary(as intel hex is ascii rep of binary) and binary to hex but it does not give me the value 00086385(hex) for input 85630800(intelhex)

I am now looking at this library Java Intel hex parser https://github.com/j123b567/java-intelhex-parser

But this talks about converting a file in intel hex to binary format not strings. I am trying to see if I can use the code(part or full) but it seems really overkill.

Also looking at Convert Intel HEX file to binary file but it is for python .

Once I get it converted to normal hex, I can use Integer.ParseInt() or Long.ParseInt() for decimal.

But I am not able to convert the intel hex string to normal hex format. In there a way to convert intel hex string to normal hex string or value in java ?

Update

After reading the answers , I realize the correct question to ask was how to convert Little endian hex strings to Big endian . The documentation for a GPS device I had, specified the format as intel hex (maybe because Intel based processors are little endians) which threw me off from understanding the format of data I had.

Answer 1

A capability ofInteger can help, a class one should read the javadoc of.

int input = (int) Long.parseLong("85630800", 16); // 0x85630800
int result = Integer.reverseBytes(input);

As the hex string can be larger than the signed int value, better use long.

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Addendum

Since java 8: parseUnsignedInt .

int input = Integer.parseUnsignedInt("85630000", 16);

Answer 2

If you need to convert a little-endian hex string into a big-endian hex string, you might start with following snippet. Depending on what you need to solve in the big picture some tuning might be needed.

String s = "85630800";
StringBuilder sb = new StringBuilder(s.length());
for (int i = s.length() - 2; i >= 0; i -= 2) {
    sb.append(s.charAt(i)).append(s.charAt(i+1));
}
System.out.println(sb);

output

00086385