Но валидатор не принимает
package com.javarush.task.task17.task1717;
/*
Лишняя синхронизация
*/
public class Solution {
char[] value;
int count;
public Solution append(CharSequence s) {
// synchronized (Solution.class) {
if (s == null) {
// synchronized (this) {
s = "null";
//}
}
if (s instanceof String) {
// synchronized (this) {
return this.append((String) s);
// }
}
if (s instanceof Solution) {
// synchronized (this) {
return this.appendThis((Solution) s);
// }
}
// }
return this.append(s);
}
public synchronized Solution appendThis(Solution s) {
//do something here....
return this;
}
private static final java.io.ObjectStreamField[] serialPersistentFields =
{
new java.io.ObjectStreamField("value", char[].class),
new java.io.ObjectStreamField("count", Integer.TYPE),
new java.io.ObjectStreamField("shared", Boolean.TYPE),
};
private synchronized void writeObject(java.io.ObjectOutputStream s) throws java.io.IOException {
java.io.ObjectOutputStream.PutField fields = s.putFields();
// synchronized (fields) {
fields.put("value", value);
fields.put("count", count);
fields.put("shared", false);
// }
// synchronized (s) {
s.writeFields();
// }
}
private void readObject(java.io.ObjectInputStream s) throws java.io.IOException, ClassNotFoundException {
synchronized (new java.io.IOException()) {
java.io.ObjectInputStream.GetField fields = s.readFields();
value = (char[]) fields.get("value", null);
count = fields.get("count", 0);
}
}
public static void main(String[] args) {
}
}