【Java】－阿雅的部落格

import java.util.Scanner;

public class test {
   public static void main(String[] args) {
       Scanner scanner = new Scanner(System.in);
       /*String s261="ABCDEFGHIJKLMNOPQRSTUVWXYZ";
       String s262="abcdefghijklmnopqrstuvwxyz";
       while(scanner.hasNext()){
           String str=scanner.nextLine();
           for(int i=0;i<26;i++){
               if(str.equals(s261.substring(i, i+1))){
                   System.out.println(s262.substring(i, i+1));
               }else if(str.equals(s262.substring(i, i+1))){
                   System.out.println(s261.substring(i, i+1));
               }
           }
       }
       String[] s261={"A","B","C"};
       String[] s262={"a","b","c"};
       while(scanner.hasNext()){
           String str=scanner.nextLine();
           for(int i=0;i<3;i++){
               if(str.equals(s261[i])){
                   System.out.println(s262[i]);
               }else if(str.equals(s262[i])){
                   System.out.println(s261[i]);
               }
           }
       }*/
       //String 字串 Char 字元
       /*char c='d';
       int Ic=(int)c;
       if(Ic>=65 && Ic<=90){
           Ic=Ic+32;
       }
       if(Ic>=97 && Ic<=122){
           Ic=Ic-32;
       }
       System.out.println((char)Ic);*/

       /*while(scanner.hasNext()){
           String str=scanner.nextLine();
           char c=str.charAt(0);
           int Ic=(int)c;
           if(Ic>=65 && Ic<=90){
               Ic=Ic+32;
           }else if(Ic>=97 && Ic<=122){
               Ic=Ic-32;
           }
           System.out.println((char)Ic);
       }*/

       while(scanner.hasNext()){
           String str=scanner.nextLine();
           for(int i=0;i<str.length();i++){
               char c=str.charAt(i);
               int Ic=(int)c;
               if(Ic>=65 && Ic<=90){
                   Ic=Ic+32;
               }else if(Ic>=97 && Ic<=122){
                   Ic=Ic-32;
               }
               System.out.print((char)Ic);
           }
       }
       scanner.close();
   }
}