Java Character class

The Character class is used to operate on a single character.

Character class wraps a value of basic type char in an object

Instance

char ch = 'a';

// Unicode 字符表示形式
char uniChar = '\u039A'; 

// 字符数组
char[] charArray ={ 'a', 'b', 'c', 'd', 'e' };

However, in the actual development process, we often encounter To situations where you need to use objects instead of built-in data types. In order to solve this problem, the Java language provides a wrapper class Character class for the built-in data type char.

The Character class provides a series of methods to manipulate characters. You can use the Character constructor to create a Character class object, for example:

Character ch = new Character('a');

In some cases, the Java compiler will automatically create a Character object.

For example, when a char type parameter is passed to a method that requires a Character type parameter, the compiler will automatically convert the char type parameter into a Character object. This feature is called boxing, and the converse is called unboxing.

Example

// 原始字符 'a' 装箱到 Character 对象 ch 中
Character ch = 'a';

// 原始字符 'x' 用 test 方法装箱
// 返回拆箱的值到 'c'
char c = test('x');

Escape sequence

The character preceded by a backslash (\) represents an escape character, which is special to the compiler meaning.

The following list shows Java escape sequences:

Example

When a print statement encounters an escape sequence, the compiler can interpret it correctly.

The following example escapes double quotes and outputs:

public class Test {

   public static void main(String args[]) {
      System.out.println("访问\"php中文网!\"");
   }
}

The compilation and running results of the above example are as follows:

访问"php中文网!"

Character method

The following is Character Class method:

For a complete list of methods, please refer to the java.lang.Character API specification.