chartest.java

还不错的java基本实例

import javax.swing.JOptionPane;
public class CharTest {
         public static void main( String args[] )
       {
             char ch1,ch2;
                int i ;
               String str  = "你输入的是字母，数字之外的字符";
              String s =  JOptionPane.showInputDialog( "输入字符" );
               ch1=s.charAt(0);
                if (Character.isLetter(ch1))
                {
                    i = ch1;
                    str = "你输入的是字母" + ch1+ "其整数值为"+ i  ;
                }
                if (Character.isDigit(ch1) )
                {
                    ch2 = (char) (Integer.parseInt(new Character(ch1).toString())+65);
                    str = "你输入的是数字" + ch1+ "该数字加65后对应的字符为"+ ch2;
                }
             JOptionPane.showMessageDialog(null,str);
             System.exit(0);
         }
}