?? concretedatamanager.java
字號:
package model;
import java.util.ArrayList;
public class ConcreteDataManager extends DataManager {
private ConcreteDataManager() {// SINGLETON
super();
this.datastorage = new ArrayList<Double>();
}
@Override
public void addData(double data) {
datastorage.add(data);
renewData();
}
@Override
public void deleteData(double data) {
datastorage.remove(data);
renewData();
}
@Override
public double[] getAllData() {
double[] result;
Object[] temp = datastorage.toArray();
result = new double[temp.length];
for (int i = 0; i < result.length; i++) {
result[i] = ((Double) temp[i]).doubleValue();
}
return result;
}
public static DataManager getInstance() {
if (instance == null)
instance = new ConcreteDataManager();
return instance;
}
private void renewData() {
displayer.renewData(this.getAllData());
}
private static ConcreteDataManager instance;
private ArrayList<Double> datastorage;
@Override
public void deleteAll() {
datastorage = new ArrayList<Double>();
renewData();
}
}
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