String转换成int型

private boolean judge(String str){
        int year = 0;
        try{
            year = Integer.valueOf(str).intValue();
        }catch(NumberFormatException e){
            e.printStackTrace();
        }

        if(year%4==0 && year%100!=0){
            return true;
        }
        else{
            return false;
        }
    }