Convert hexadecimal byte array to int [closed]

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I read 4 hexadecimal bytes from input stream into an array on server side from client, f.e. x00x00x02x24 which is 224 in hex. I need to convert it into an int. How could this be done?

asked Nov 10 at 21:26

David Bulko

closed as unclear what you're asking by ruakh, sleske, GBlodgett, Matthew L Daniel, Devon_C_Miller Nov 11 at 5:43

Please clarify your specific problem or add additional details to highlight exactly what you need. As it's currently written, it’s hard to tell exactly what you're asking. See the How to Ask page for help clarifying this question. If this question can be reworded to fit the rules in the help center, please edit the question.

I'm missing something. It sounds like your input is just new byte { 0, 0, 2, 36 }; but there's nothing "hexadecimal" about that (other than that you've chosen to write it as x00x00x02x24 for some reason in the text of the question itself). Can you clarify?
– ruakh
Nov 10 at 21:31

I'm sorry that's as much as I know. I'm not sure how to check it, the program I'm writing does also other tasks with multiple threads at once.
– David Bulko
Nov 10 at 22:09

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0
down vote

favorite

I read 4 hexadecimal bytes from input stream into an array on server side from client, f.e. x00x00x02x24 which is 224 in hex. I need to convert it into an int. How could this be done?

asked Nov 10 at 21:26

David Bulko

closed as unclear what you're asking by ruakh, sleske, GBlodgett, Matthew L Daniel, Devon_C_Miller Nov 11 at 5:43

I'm missing something. It sounds like your input is just new byte { 0, 0, 2, 36 }; but there's nothing "hexadecimal" about that (other than that you've chosen to write it as x00x00x02x24 for some reason in the text of the question itself). Can you clarify?
– ruakh
Nov 10 at 21:31

I'm sorry that's as much as I know. I'm not sure how to check it, the program I'm writing does also other tasks with multiple threads at once.
– David Bulko
Nov 10 at 22:09

add a comment |

up vote
0
down vote

favorite

I read 4 hexadecimal bytes from input stream into an array on server side from client, f.e. x00x00x02x24 which is 224 in hex. I need to convert it into an int. How could this be done?

asked Nov 10 at 21:26

David Bulko

I read 4 hexadecimal bytes from input stream into an array on server side from client, f.e. x00x00x02x24 which is 224 in hex. I need to convert it into an int. How could this be done?

java

asked Nov 10 at 21:26

David Bulko

asked Nov 10 at 21:26

David Bulko

asked Nov 10 at 21:26

David Bulko

asked Nov 10 at 21:26

David Bulko

asked Nov 10 at 21:26

David Bulko

closed as unclear what you're asking by ruakh, sleske, GBlodgett, Matthew L Daniel, Devon_C_Miller Nov 11 at 5:43

I'm missing something. It sounds like your input is just new byte { 0, 0, 2, 36 }; but there's nothing "hexadecimal" about that (other than that you've chosen to write it as x00x00x02x24 for some reason in the text of the question itself). Can you clarify?
– ruakh
Nov 10 at 21:31

I'm sorry that's as much as I know. I'm not sure how to check it, the program I'm writing does also other tasks with multiple threads at once.
– David Bulko
Nov 10 at 22:09

add a comment |

I'm missing something. It sounds like your input is just new byte { 0, 0, 2, 36 }; but there's nothing "hexadecimal" about that (other than that you've chosen to write it as x00x00x02x24 for some reason in the text of the question itself). Can you clarify?
– ruakh
Nov 10 at 21:31

I'm sorry that's as much as I know. I'm not sure how to check it, the program I'm writing does also other tasks with multiple threads at once.
– David Bulko
Nov 10 at 22:09

I'm missing something. It sounds like your input is just new byte { 0, 0, 2, 36 }; but there's nothing "hexadecimal" about that (other than that you've chosen to write it as x00x00x02x24 for some reason in the text of the question itself). Can you clarify?
– ruakh
Nov 10 at 21:31

I'm sorry that's as much as I know. I'm not sure how to check it, the program I'm writing does also other tasks with multiple threads at once.
– David Bulko
Nov 10 at 22:09

add a comment |

1 Answer
1

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up vote
1
down vote

Shift and sum them (as it done in DataInputStream#readInt())

byte bytes = {0, 0, 0x2, 0x24};

int i = ((bytes[0] << 24) + (bytes[1]<< 16) + (bytes[2]<< 8) + (bytes[3] << 0));

System.out.println(i);

Output:

548

Maybe you're looking for DataInputStream?

byte bytes = {0, 0, 0x2, 0x24};

DataInputStream inputStream = new DataInputStream(new ByteArrayInputStream(bytes));

System.out.println(inputStream.readInt());

Output:

548

edited Nov 10 at 21:47

answered Nov 10 at 21:41

caco3

7211415

I'm lookimg for something like this, only shouldn't 224 hex be 548 decimal?
– David Bulko
Nov 10 at 21:55

@DavidBulko yes, 0x224 = 548
– caco3
Nov 10 at 22:00

add a comment |

1 Answer
1

active

oldest

votes

1 Answer
1

active

oldest

votes

up vote
1
down vote

Shift and sum them (as it done in DataInputStream#readInt())

byte bytes = {0, 0, 0x2, 0x24};

int i = ((bytes[0] << 24) + (bytes[1]<< 16) + (bytes[2]<< 8) + (bytes[3] << 0));

System.out.println(i);

Output:

548

Maybe you're looking for DataInputStream?

byte bytes = {0, 0, 0x2, 0x24};

DataInputStream inputStream = new DataInputStream(new ByteArrayInputStream(bytes));

System.out.println(inputStream.readInt());

Output:

548

edited Nov 10 at 21:47

answered Nov 10 at 21:41

caco3

7211415

I'm lookimg for something like this, only shouldn't 224 hex be 548 decimal?
– David Bulko
Nov 10 at 21:55

@DavidBulko yes, 0x224 = 548
– caco3
Nov 10 at 22:00

add a comment |

up vote
1
down vote

Shift and sum them (as it done in DataInputStream#readInt())

byte bytes = {0, 0, 0x2, 0x24};

int i = ((bytes[0] << 24) + (bytes[1]<< 16) + (bytes[2]<< 8) + (bytes[3] << 0));

System.out.println(i);

Output:

548

Maybe you're looking for DataInputStream?

byte bytes = {0, 0, 0x2, 0x24};

DataInputStream inputStream = new DataInputStream(new ByteArrayInputStream(bytes));

System.out.println(inputStream.readInt());

Output:

548

edited Nov 10 at 21:47

answered Nov 10 at 21:41

caco3

7211415

I'm lookimg for something like this, only shouldn't 224 hex be 548 decimal?
– David Bulko
Nov 10 at 21:55

@DavidBulko yes, 0x224 = 548
– caco3
Nov 10 at 22:00

add a comment |

up vote
1
down vote

Shift and sum them (as it done in DataInputStream#readInt())

byte bytes = {0, 0, 0x2, 0x24};

int i = ((bytes[0] << 24) + (bytes[1]<< 16) + (bytes[2]<< 8) + (bytes[3] << 0));

System.out.println(i);

Output:

548

Maybe you're looking for DataInputStream?

byte bytes = {0, 0, 0x2, 0x24};

DataInputStream inputStream = new DataInputStream(new ByteArrayInputStream(bytes));

System.out.println(inputStream.readInt());

Output:

548

edited Nov 10 at 21:47

answered Nov 10 at 21:41

caco3

7211415

Shift and sum them (as it done in DataInputStream#readInt())

byte bytes = {0, 0, 0x2, 0x24};

int i = ((bytes[0] << 24) + (bytes[1]<< 16) + (bytes[2]<< 8) + (bytes[3] << 0));

System.out.println(i);

Output:

548

Maybe you're looking for DataInputStream?

byte bytes = {0, 0, 0x2, 0x24};

DataInputStream inputStream = new DataInputStream(new ByteArrayInputStream(bytes));

System.out.println(inputStream.readInt());

Output:

548

edited Nov 10 at 21:47

answered Nov 10 at 21:41

caco3

7211415

edited Nov 10 at 21:47

answered Nov 10 at 21:41

caco3

7211415

answered Nov 10 at 21:41

caco3

7211415

answered Nov 10 at 21:41

caco3

7211415

I'm lookimg for something like this, only shouldn't 224 hex be 548 decimal?
– David Bulko
Nov 10 at 21:55

@DavidBulko yes, 0x224 = 548
– caco3
Nov 10 at 22:00

add a comment |

I'm lookimg for something like this, only shouldn't 224 hex be 548 decimal?
– David Bulko
Nov 10 at 21:55

@DavidBulko yes, 0x224 = 548
– caco3
Nov 10 at 22:00

I'm lookimg for something like this, only shouldn't 224 hex be 548 decimal?
– David Bulko
Nov 10 at 21:55

@DavidBulko yes, 0x224 = 548
– caco3
Nov 10 at 22:00

add a comment |

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