[JAVA] I want to convert characters ...

I'm doing a competition pro and I've run out of time due to problem A, so take notes

One character can be operated by char type

Convert one character to the next

char c = 'a';
System.out.println( c ); // b

Case conversion

char c = 'a';
c -= 32;
System.out.println( c ); // A

Convert from lowercase to uppercase -32 Uppercase to lowercase conversion is +32


If you calculate on the argument, the character code will be output, so it may be better to add one line quietly

char c = 'a';
System.out.println( c - 32 ); // 65
System.out.println( (char)( c - 32 ) ); //A: OK if you cast

Stumble problem


A - Next Alphabet

Problem statement

Given a lowercase C that is not z. Output the next letter of C in alphabetical order.


C is a non-z lowercase letter


import java.util.*;

public class Main {

    public static void main(String[] args) {

        Scanner in = new Scanner(System.in);
        char c = in.nextLine().charAt(0);
        System.out.println( ++c );




Actual answer

import java.util.*;
public class Main {
    public static void main(String[] args) {
        Scanner in = new Scanner(System.in);
        String c = in.nextLine();
        String base = "abcdefghijklmnopqrstuvwxyz";
        for( int i = 0 ; i < base.length() ; i++ ){
            if( c.charAt(0) == base.charAt( i ) ){
                System.out.println( base.charAt( i + 1 ) );

????????????????????? Well, well, well, I'm not wrong It's AC

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