Adding and removing elements efficiently from Collection object
- by user569125
Hi,
Below coding is the working sample,but still i am not happy with this code with related to performancewise.Please have a look and let me know if any better approach is there.Thanks in advance.
Adding items to the arraylist object
String resultItems[] = paging.getMoveLeftArray().split(",");
String fields[]={"id","name","name1"};
leftObj=new ArrayList();
for(int i=0;i<resultItems.length;i++){
//below line mea
TestVO bean=new TestVO();
String resultItem = resultItems[i];
String idANDname[] = resultItem.split("@");
String id = idANDname[0];
// name or id should not contain "-"
String name[] = idANDname[1].split("-");
//values and fileds are always having same length
for(int j=0;j<name.length;j++) {
PropertyUtils.setProperty(bean, fields[j], name[j]);
}
leftObj.add(bean);
}
Removing items from the arraylist object:availableList contains all the TestVO objects:
String []removeArray=paging.getMoveRightArray().split(",");
tempList=new CopyOnWriteArrayList();
newTempList=new CopyOnWriteArrayList();
for(int i=0;i<availableList.size();i++){
boolean flag = false;
TestVO tempObj = (TestVO )availableList.get(i);
int id =(Integer)tempObj.getId();
// System.out.println("id value"+id);
// availableList.get(i).getClass().getField(name);
for(int j=0;j<removeArray.length;j++){
String resultItem = removeArray[j];
String idandname[] = resultItem.split("@");
for(int k=0;k<idandname.length;k++){
String ids[]=idandname[0].split("-");
if(id==Integer.parseInt(ids[0])){
flag = true;
break;
}
}
}
if(flag){
tempList.add(tempObj);
}
else{
newTempList.add(tempObj);
}
