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finish 组合 #233

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finish 组合 #233

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25 changes: 19 additions & 6 deletions src/main/java/com/github/hcsp/inheritance/CountingSet.java
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Original file line number Diff line number Diff line change
Expand Up @@ -4,20 +4,33 @@
import java.util.Collection;
import java.util.HashSet;

public class CountingSet extends HashSet<Object> {
/** 统计"有史以来"向该集合中添加过的元素个数 */
public class CountingSet {
/**
* 统计"有史以来"向该集合中添加过的元素个数
*/
HashSet<Object> set = new HashSet<>();
private int count = 0;

@Override
public boolean remove(Object obj) {
return set.remove(obj);
}

public boolean add(Object obj) {
count++;
return super.add(obj);
return set.add(obj);
}

@Override
public boolean addAll(Collection c) {
count += c.size();
return super.addAll(c);
return set.addAll(c);
}

public int size() {
return set.size();
}

public Boolean removeAll(Collection c) {
return set.removeAll(c);
}

public int getCount() {
Expand Down