백준 2908번 - 상수

 

 

아무것도 모르고 짠 내 코드..

public class Main {
 
    public static void div(int a, int b) throws IOException {
        BufferedWriter bw=new BufferedWriter(new OutputStreamWriter(System.out));
        if(a>b) {
            bw.write(a);
        }else if(a<b) {
            bw.write(b);
        }
        bw.flush();
        bw.close();
    }
    
    public static void main(String[] args) throws IOException {
        BufferedReader bf=new BufferedReader(new InputStreamReader(System.in));
        String a=bf.readLine();
        int first=Character.getNumericValue(a.charAt(2))*100+Character.getNumericValue(a.charAt(1))*10
        +Character.getNumericValue(a.charAt(0))*1;
        String b=bf.readLine();
        int second=Character.getNumericValue(b.charAt(2))*100+Character.getNumericValue(b.charAt(1))*10
                +Character.getNumericValue(b.charAt(0))*1;
        div(first, second);
        
 
    }
}
 

응 런타임 에러

 

수업에서 쪼꼼 배운 라이브러리로는 커버하기가 점점 힘들어지고 있는 것이다..책으로 공부해야 할 때인가?

 

 

- StringTokenizer, StringBuilder 로 간결하게 짜기(참고 : https://st-lab.tistory.com/66)

public class Main {
 
    public static void div(int a, int b) {
        if(a>b) {
            System.out.println(a);
        }else if(a<b) {
            System.out.println(b);
        }
    }
    
    public static void main(String[] args) throws IOException {
        BufferedReader bf=new BufferedReader(new InputStreamReader(System.in));
        String a=bf.readLine();
        StringTokenizer st=new StringTokenizer(a, " ");
        int first=Integer.parseInt(new StringBuilder(st.nextToken()).reverse().toString());
        int second=Integer.parseInt(new StringBuilder(st.nextToken()).reverse().toString());
        div(first, second);
        
    }
}