Use Character.isDigit to check the if a char is a digit : 字符 « 数据类型 « Java

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Java 教程
Java » 数据类型 » 字符屏幕截图 
Use Character.isDigit to check the if a char is a digit
   
class MainCLass {
  public static void main(String[] args) {
    System.out.println("Is the Latin symbol 6 a digit? " + Character.isDigit('6'));

    System.out.println("Is the Tamil symbol corresponding to "
        + "Unicode value '\\u0beb' a digit? " + Character.isDigit('\u0beb'));

    System.out.println("Is the Greek symbol Omega a digit? " + Character.isDigit('\u03a9'));

    System.out.println("Is the Latin symbol A a digit? " + Character.isDigit('A'));

  }
}

   
    
  
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2. Character class creates primitives that wrap themselves around data items of the char data type
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5. Use Character.isLetter to check if a char is a letter
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10. If a character is uppercase
11. if a character is lowercase
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13. switch with char value
14. Escape Sequence Characters
15. Char is IntChar is Int
16. Convert from integer to ASCII code (byte)
17. Plus one to char variable
18. Store unicode in a char variable
19. All static information about a character
20. Compare Two Java char Arrays
21. Convert from ASCII code to String
22. Copy char array to string
23. Convert to hex
24. Determining a Character's Unicode Block
25. Determining If a String Is a Legal Java Identifier
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