Get ASCII value at input word

Question

I have a character      char ch  A    Give me method which converts char to ASCII or way which returns a ASCII NUMBER   Output    65

User · Answer

There is a major gotcha associated with getting an ASCII code of a char value.

In the proper sense, it can't be done.

It's because char has a range of 65535 whereas ASCII is restricted to 128. There is a huge amount of characters that have no ASCII representation at all.

The proper way would be to use a Unicode code point which is the standard numerical equivalent of a character in the Java universe.

Thankfully, Unicode is a complete superset of ASCII. That means Unicode numbers for Latin characters are equal to their ASCII counterparts. For example, A in Unicode is U+0041 or 65 in decimal. In contrast, ASCII has no mapping for 99% of char-s. Long story short:

char ch = 'A';
int cp = String.valueOf(ch).codePointAt(0);

Furthermore, a 16-bit primitive char actually represents a code unit, not a character and is thus restricted to Basic Multilingual Plane, for historical reasons. Entities beyond it require Character objects which deal away with the fixed bit-length limitation.

User · Answer

char a  a   char A  A   System out println  int a       int A    Output  97 65

User · Answer

A char is actually a numeric datatype - you can add one to an int  for example   It s an unsigned short  16 bits    In that regard you can just cast the output to  say  an int to get the numeric value   However you need to think a little more about what it is you re asking - not all characters are ASCII values   What output do you expect for     for example  or     Moreover  why do you want this   In this day and age you ought to be thinking about Unicode  not ASCII   If you let people know what your goal is  and how you intend to use this returned value  we can almost certainly let you know of a better way to achieve it

User · Answer

char ch  A    System out println  int ch

User · Answer

simply do  int a   ch    also this has nothing to do with android

User · Answer

char  with a lower-case c  is a numeric type  It already holds the ascii value of the char  Just cast it to an integer to display it as a numeric value rather than a textual value   System out println  char     ch     has the following value        int  ch

[java] Get ASCII value at input word

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