Character类的测试

最新推荐文章于 2023-03-28 23:34:49 发布

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本文通过一个Java示例程序，详细展示了如何使用Character类的各种方法来操作字符，包括获取Unicode码、比较字符、数字转换及字符属性判断等。适用于Java初学者理解和掌握字符的基本操作。

/**
* @author huangtao
*
*/
public class CharacterTest
{
public static void main(String[] args)
{
  //获取unicode码
  for(int i = 0 ; i<100 ; i++)
  {
   char[] ch = new char[100];
   ch[i] = (char) i;
      System.out.println(Character.codePointAt(ch , i));
   System.out.println(Character.codePointAt(ch , i , 50));
   if (i==49)
   {
    break;
   }
  }

  //声明Character对象
  Character ch1=new Character('1');
  Character ch2=new Character('2');
  System.out.println(ch1.compareTo(ch2));
  System.out.println(ch2.compareTo(ch1));

  //返回基于相应基数的数
  System.out.println("changeone");
  System.out.println(Character.digit('1' , 2));
  System.out.println(Character.digit('1' , 8));
  System.out.println(Character.digit('1' , 10));
  System.out.println(Character.digit('1' , 16));

  //把数转换成基于相应的字符
  System.out.println("changetwo");
  System.out.println(Character.forDigit(1 , 2));
  System.out.println(Character.forDigit(7 , 8));
  System.out.println(Character.forDigit(9 , 10));
  System.out.println(Character.forDigit(10 , 16));

  //各种判断
  System.out.println(Character.isDigit('1'));
  System.out.println(Character.isDigit('a'));
  System.out.println(Character.isJavaIdentifierPart('i'));
  System.out.println(Character.isJavaIdentifierStart('j'));
  System.out.println(Character.isLetter('1'));
  System.out.println(Character.isLetterOrDigit('1'));
  System.out.println(Character.isMirrored('a'));
  System.out.println(Character.isSpaceChar('_'));
  System.out.println(Character.isUpperCase('a'));
  System.out.println(Character.isLowerCase('a'));
  System.out.println(Character.isValidCodePoint(' '));
  System.out.println(Character.isTitleCase('a'));
  System.out.println(Character.isTitleCase('A'));

}
}