Usage analysis of Character class

This article mainly introduces the Character class methods in JAVA in detail. Friends who need it can refer to

When using characters, we usually use the built-in data type char.

Example

char ch = 'a';
// Unicode for uppercase Greek omega character
char uniChar = '\u039A'; 
// 字符数组
char[] charArray ={ 'a', 'b', 'c', 'd', 'e' };

However, in the actual development process, we often encounter the need to use objects instead of built-in data type of situation. 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 = <a href="//m.sbmmt.com/wiki/165.html" target="_blank">new</a> 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

// Here following primitive char 'a'
// is boxed into the Character object ch
Character ch = 'a';

// Here primitive 'x' is boxed for method test,
// return is unboxed to char 'c'
char c = test('x');

Escape sequence

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

The following list shows Java's escape sequences:

Example

public class Test {
  public static void main(String args[]) {
   System.out.println("She said \"Hello!\" to me.");
  }
}

She said "Hello!" to me.

Character method

2. Detailed explanation of instances of the Character class

3. Detailed explanation of the differences between Character and char methods

4. Explain in detail the Character class in Java

5. Instance analysis of the packaging class Character

The above is the detailed content of Usage analysis of Character class. For more information, please follow other related articles on the PHP Chinese website!