you can do math with the char primitive, so you can use string.charAt(index) to get the individual character and do +1 to it, i.e. 'a' + 1 is 'b'. You can't put it back into the original string, however as strings are immutable. Either create a new string or use StringBuilder. edit: Also, you will have to handle 'Z' or 'z' differently, obviously. More on reddit.com

Hi,everyone! I want to convert the string "����" to ascii , for example: "����" -> \u4e2d\u56fd The "->" means the "����" will be converted to "\u... More on forums.oracle.com

So there can be characters in a Java string that do not belong to ASCII. Such characters do not have an ASCII numeric value, so asking how to get the ASCII numeric value of a Java character is unanswerable. But why do you want to do this anyway? What are you going to do with the value? If you want the numeric value so you can convert ... More on stackoverflow.com

Get the char value of the first letter from the String. Cast the char to an int. Character Docs Unicode Character Representations The char data type (and therefore the value that a Character object encapsulates) are based on the original Unicode specification, which defined characters as fixed-width 16-bit entities. The Unicode Standard has since been changed to allow for characters whose representation requires more than 16 bits. The range of legal code points is now U+0000 to U+10FFFF, known as Unicode scalar value. (Refer to the definition of the U+n notation in the Unicode Standard.) The set of characters from U+0000 to U+FFFF is sometimes referred to as the Basic Multilingual Plane (BMP). Characters whose code points are greater than U+FFFF are called supplementary characters. The Java platform uses the UTF-16 representation in char arrays and in the String and StringBuffer classes. In this representation, supplementary characters are represented as a pair of char values, the first from the high-surrogates range, (\uD800-\uDBFF), the second from the low-surrogates range (\uDC00-\uDFFF). A char value, therefore, represents Basic Multilingual Plane (BMP) code points, including the surrogate code points, or code units of the UTF-16 encoding. An int value represents all Unicode code points, including supplementary code points. The lower (least significant) 21 bits of int are used to represent Unicode code points and the upper (most significant) 11 bits must be zero. Unless otherwise specified, the behavior with respect to supplementary characters and surrogate char values is as follows: The methods that only accept a char value cannot support supplementary characters. They treat char values from the surrogate ranges as undefined characters. For example, Character.isLetter('\uD840') returns false, even though this specific value if followed by any low-surrogate value in a string would represent a letter. The methods that accept an int value support all Unicode characters, including supplementary characters. For example, Character.isLetter(0x2F81A) returns true because the code point value represents a letter (a CJK ideograph). More on reddit.com