動態生成在Java

Question

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

這裏對象的我需要創建新對象TransactionLOgDTO動態insed像below.If環有在HashSet的3個regioncodes我需要regionCode附加到新對象的名稱3個TransactionLOgDTO對象。

TransactionLOgDTO regionCode1DTO=new TransactionLOgDTO(); 

} 

我需要像這樣做...........................

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

Answer 1

我建議使用ArrayList，而不是把指標在變量名：

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

，或者因爲你沒有使用regionCode字符串：

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

然後你可以使用訪問它們：

regionCodeDTOs.get(i); 

[編輯]
如果你想在regionCode連接到TransactionLogDTO我會建議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()); 
} 

檢索哪些

像：

transactionCodeDTOs.get(regionCode);