2. 코드

public class StrToInt {
    public int getStrToInt(String str) {
        try {
            return Integer.parseInt(str);
        } catch(Exception e) {
            return 0;
        }
    }

    public static void main(String args[]) {
        StrToInt strToInt = new StrToInt();
        System.out.println(strToInt.getStrToInt("-1234"));
    }
}