Detailed explanation of the Character class in Java

Character class is used to operate on single characters.

The Character class wraps a basic type char value in the 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 situations where we 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 Character's constructor method to create a Character class object, for example:

Character ch = new Character('a');

In some cases, the Java compiler automatically creates 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

With a backslash (\) in front character represents an escape character, which has special meaning to the compiler.

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:

Test.java file code:

public class Test {
 
   public static void main(String args[]) {
      System.out.println("访问\"菜鸟教程!\"");   }}

The above example compiles and runs the results as follows:

访问"菜鸟教程!"

Character method

The following are the methods of the Character class:

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