Java - 백준 코딩테스트 10951번 [while문 - A + B - 4]

import java.io.BufferedReader;
import java.io.BufferedWriter;
import java.io.IOException;
import java.io.InputStreamReader;
import java.io.OutputStreamWriter;
import java.util.StringTokenizer;
 
public class AplusB4 {
 
    public static void main(String[] args) throws IOException {
        // 20210618 - 10951번
        //============================================================다시 풀기
        BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
        BufferedWriter bw = new BufferedWriter(new OutputStreamWriter(System.out));
 
        String str = "";
        StringTokenizer st;
        int num1 = 0;
        int num2 = 0;
        while ((str = br.readLine()) != null) {
            try {
                st = new StringTokenizer(str);
                num1 = Integer.parseInt(st.nextToken());
                num2 = Integer.parseInt(st.nextToken());
 
            } catch (Exception o) {
                break;
            }
 
            bw.write(String.valueOf(num1 + num2));
            bw.newLine();
        }
 
        bw.flush();
        br.close();
        bw.close();
    }
}