常见对象_Character的常见方法讲解

package cn.itcast_08;

/*
 * public static boolean isUpperCase(char ch):判断给定的字符是否是大写字符
 * public static boolean isLowerCase(char ch):判断给定的字符是否是小写字符
 * public static boolean isDigit(char ch):判断给定的字符是否是数字字符
 * public static char toUpperCase(char ch):把给定的字符转换为大写字符
 * public static char toLowerCase(char ch):把给定的字符转换为小写字符
 */
public class CharacterDemo {
  public static void main(String[] args) {
    //public static boolean isUpperCase(char ch):判断给定的字符是否是大写字符
    System.out.println("isUpperCase:"+Character.isUpperCase('A'));
    System.out.println("isUpperCase:"+Character.isUpperCase('a'));
    System.out.println("------------------------");
    
    //public static boolean isLowerCase(char ch):判断给定的字符是否是小写字符
    System.out.println("isLowerCase:"+Character.isLowerCase('A'));
    System.out.println("isLowerCase:"+Character.isLowerCase('a'));
    System.out.println("------------------------");
    
    //public static boolean isDigit(char ch):判断给定的字符是否是数字字符
    System.out.println("isDigit:"+Character.isDigit('1'));
    System.out.println("isDigit:"+Character.isDigit('a'));
    System.out.println("------------------------");
    
    //public static char toUpperCase(char ch):把给定的字符转换为大写字符
    System.out.println("toUpperCase:"+Character.toUpperCase('a'));
    System.out.println("------------------------");
    
    //public static char toLowerCase(char ch):把给定的字符转换为小写字符
    System.out.println("toLowerCase:"+Character.toLowerCase('A'));
  }
}