What is the mistake of Java programmer's habitual thinking?

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The structure of the table is as follows:

T_SOME_TABLE {crowid varchar (36); zrmb float (7Magne3); zjdw float (7Phone3);}

Ask the following two pieces of code, which part will make an error and why?

Code snippet 1:

/ / the background code is as follows: String hqlStr= "select SUM (t.zrmb) AS SUM_1,SUM (t.zjdw) AS SUM_2 from T_SOME_TABLE t where 1x1"; List sumList=baseDao.find (hqlStr); / / hibernate implements the query HQL summary statement to return the result List request.setAttribute ("sumList", sumList); / / the foreground code is as follows: String sum1= "; String sum2=" ArrayList sumList=request.getAttribute ("sumList") = = null?null: (ArrayList) request.getAttribute ("sumList"); if (nullroomroomsumList) {for (int iTuno)