Check if a character representing a number : 字符 « 数据类型 « Java

En
Java
1. 图形用户界面
2. 三维图形动画
3. 高级图形
4. 蚂蚁编译
5. Apache类库
6. 统计图
7. 类
8. 集合数据结构
9. 数据类型
10. 数据库JDBC
11. 设计模式
12. 开发相关类
13. EJB3
14. 电子邮件
15. 事件
16. 文件输入输出
17. 游戏
18. 泛型
19. GWT
20. Hibernate
21. 本地化
22. J2EE平台
23. 基于J2ME
24. JDK-6
25. JNDI的LDAP
26. JPA
27. JSP技术
28. JSTL
29. 语言基础知识
30. 网络协议
31. PDF格式RTF格式
32. 映射
33. 常规表达式
34. 脚本
35. 安全
36. Servlets
37. Spring
38. Swing组件
39. 图形用户界面
40. SWT-JFace-Eclipse
41. 线程
42. 应用程序
43. Velocity
44. Web服务SOA
45. 可扩展标记语言
Java 教程
Java » 数据类型 » 字符屏幕截图 
Check if a character representing a number
  

public class Main {
  public static void main(String[] args) {
    String numbers = "1234567890";
    for (int i = 0; i < numbers.length(); i++) {
      if (Character.isDigit(numbers.charAt(i))) {
        System.out.println(numbers.charAt(i) + " is a number.");
      } else {
        System.out.println(numbers.charAt(i) + " not a number.");
      }
    }
  }
}

   
    
  
Related examples in the same category
1. Java char: char is 16 bit type and used to represent Unicode characters. Range of char is 0 to 65,536.
2. Character class creates primitives that wrap themselves around data items of the char data type
3. Create Character objects and compare them
4. Use Character.isLowerCase, Character.isUpperCase to check the letter case
5. Use Character.isLetter to check if a char is a letter
6. Count letters in a String
7. Use Character.isDigit to check the if a char is a digit
8. Validate if a String contains only numbers
9. Check if a character representing an alphabet
10. If a character is uppercase
11. if a character is lowercase
12. Is character a digit, letter, white space, lower case or upper case character
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
www.java2java.com | Contact Us
Copyright 2010 - 2030 Java Source and Support. All rights reserved.
All other trademarks are property of their respective owners.