01. 문자 찾기
import java.util.*;
public class Main {
public int solution(String str, char t) {
int answer = 0;
str = str.toUpperCase();
t = Character.toUpperCase(t);
for(int i = 0; i < str.length(); i++) {
if(str.charAt(i) == t) answer++;
}
return answer;
}
public static void main(String[] args){
Main T = new Main();
Scanner kb = new Scanner(System.in);
String str=kb.next();
char c = kb.next().charAt(0);
System.out.print(T.solution(str, c));
}
}
import java.util.*;
public class Main {
public int solution(String str, char t) {
int answer = 0;
str = str.toUpperCase();
t = Character.toUpperCase(t);
for(char x : str.toCharArray()) {
if(x == t) answer++;
}
return answer;
}
public static void main(String[] args){
Main T = new Main();
Scanner kb = new Scanner(System.in);
String str=kb.next();
char c = kb.next().charAt(0);
System.out.print(T.solution(str, c));
}
}
02. 대소문자 변환
import java.util.*;
public class Main {
public String solution(String str) {
String answer = "";
for(char x : str.toCharArray()) {
if(Character.isLowerCase(x)) answer += Character.toUpperCase(x);
else answer += Character.toLowerCase(x);
}
return answer;
}
public static void main(String[] args){
Main T = new Main();
Scanner kb = new Scanner(System.in);
String str = kb.next();
System.out.print(T.solution(str));
}
}
import java.util.*;
public class Main {
public String solution(String str) {
String answer = "";
for(char x : str.toCharArray()) {
if(x >= 97 && x <= 122) answer += (char)(x - 32);
else answer += (char)(x + 32);
}
return answer;
}
public static void main(String[] args){
Main T = new Main();
Scanner kb = new Scanner(System.in);
String str = kb.next();
System.out.print(T.solution(str));
}
}