Lorsque le type Java est forcé d'être converti en type générique V, aucune erreur n'est signalée ?
public class StrictMap<V> extends HashMap<String, V> {
private static final long serialVersionUID = -3455861209780003757L;
private String name;
public StrictMap(int initialCapacity, float loadFactor, String name) {
super(initialCapacity, loadFactor);
this.name = name;
}
public StrictMap(int initialCapacity, String name) {
super(initialCapacity);
this.name = name;
}
public StrictMap(String name) {
this.name = name;
}
public String getName() {
return name;
}
public void setName(String name) {
this.name = name;
}
@Override
public V put(String key, V value) {
if (containsKey(key)) {
throw new RuntimeException("已经存在的key, keyName = " + key);
}
if (key.contains(".")) {
final String shortName = getShortName(key);
if (containsKey(shortName)) {
// question 这边有个问题， 为什么没有抛出ClassCastException。
V ambiguity = (V) new Ambiguity("存在的shortName");
super.put(shortName, ambiguity);
} else {
super.put(shortName, value);
}
}
return super.put(key, value);
}
@Override
public V get(Object key) {
V value = super.get(key);
if (value == null) {
throw new RuntimeException("keyName = " + key + ", 没有获取到value.");
}
if (value instanceof Ambiguity) {
throw new RuntimeException("重复的shortName");
}
return value;
}
static class Ambiguity {
private String name;
public Ambiguity(String name) {
this.name = name;
}
public String getName() {
return name;
}
}
}
ps : Aucune erreur n'a été signalée lors de l'exécution.
