用Java动态生成对象

Question

HashSet<String> outScopeActiveRegionCodeSet=new HashSet<String>();
for (String regionCode : outScopeActiveRegionCodeSet) {
    //code required
}   

Here i need to create new TransactionLOgDTO objects dynamically insed the loop like below.If there are 3 regioncodes in hashset i need 3 TransactionLOgDTO objects with regionCode appended to name of new object.

TransactionLOgDTO regionCode1DTO=new TransactionLOgDTO(); 

}

I need something like this to be done...........................

for (String regionCode : outScopeActiveRegionCodeSet) { TransactionLOgDTO "regionCode"+DTO=new TransactionLOgDTO(); } 

Answer 1

I would recommend using an ArrayList instead of putting the index in the variable name:

List<TransactionLOgDTO> regionCodeDTOs = new ArrayList<TransactionLOgDTO>();
HashSet<String> outScopeActiveRegionCodeSet=new HashSet<String>();
for (String regionCode : outScopeActiveRegionCodeSet) {
    regionCodeDTOs.add(new TransactionLOgDTO());
}   

or, since you aren't using the regionCode String:

List<TransactionLOgDTO> regionCodeDTOs = new ArrayList<TransactionLOgDTO>();
HashSet<String> outScopeActiveRegionCodeSet=new HashSet<String>();
for (int i = 0; i < outScopeActiveRegionCodeSet.size(); i++) {
    regionCodeDTOs.add(new TransactionLOgDTO());
}

Then you can access them using:

regionCodeDTOs.get(i);

[EDIT]
If you want to connect the regionCode to the TransactionLogDTO I would recommend a Map instead :

Map<String, TransactionLOgDTO> transactionCodeDTOs = new HashMap<String, TransactionLOgDTO>();
HashSet<String> outScopeActiveRegionCodeSet=new HashSet<String>();
for (String regionCode : outScopeActiveRegionCodeSet) {
    transactionCodeDTOs.put(regionCode, new TransactionLOgDTO());
}

which are retrieved like:

transactionCodeDTOs.get(regionCode);