2020年9月27日
The utility class Collections Rotating table
摘要： You have a table of integer numbers. You should rotate rows of the table by the specified distance. Try to use collections and standard methods for th 阅读全文
posted @ 2020-09-27 17:46 longlong6296 阅读(154) 评论(0) 推荐(0)
List Filtering the list
摘要： Write a program that reads the list of integer numbers separated by spaces from the standard input and then remove all numbers with even indexes (0, 2 阅读全文
posted @ 2020-09-27 14:08 longlong6296 阅读(102) 评论(0) 推荐(0)
The Collections Framework overview Blacklist
摘要： Has it ever bothered you when unknown people call you and try to impose their services? That can be annoying. Let's try to solve the problem by using 阅读全文
posted @ 2020-09-27 12:23 longlong6296 阅读(107) 评论(0) 推荐(0)
2020年9月21日
Encapsulating object creation Static factory methods for Time
摘要： The normal way to create an instance of a class is to use a public constructor of the class. But there is another technique. A class can provide a pub 阅读全文
posted @ 2020-09-21 14:33 longlong6296 阅读(228) 评论(0) 推荐(0)
2020年9月17日
Callable and Future How many Callable objects are there?
摘要： You are given a Callable object. Some say that it returns another Callable object. And that Callable returns another Callable object! And so on. You s 阅读全文
posted @ 2020-09-17 18:57 longlong6296 阅读(108) 评论(0) 推荐(0)
2020年9月16日
Thread management Ordering the execution of threads
摘要： Implement a method that takes three objects (instances of Thread or its subclasses). The method must start passed objects as threads in a way that the 阅读全文
posted @ 2020-09-16 11:04 longlong6296 阅读(115) 评论(0) 推荐(0)
2020年9月14日
Creating instances Constructor Checker
摘要： Implement checkPublicParameterlessConstructor that returns true if the provided class declares public parameterless constructor and false otherwise. / 阅读全文
posted @ 2020-09-14 14:23 longlong6296 阅读(126) 评论(0) 推荐(0)
Dealing with modifiers List public fields
摘要： Implement the getPublicFields method that returns String array with names of public fields declared in the class object belongs to. Fields inherited f 阅读全文
posted @ 2020-09-14 09:35 longlong6296 阅读(119) 评论(0) 推荐(0)
2020年9月9日
Multiple constructors Employee
摘要： Here's a class named Employee with three fields: name, salary, address. Add three constructors to the class: the first one is the no-argument construc 阅读全文
posted @ 2020-09-09 17:39 longlong6296 阅读(116) 评论(0) 推荐(0)
Enum Balance management
摘要： You are given the enum Operation and the class Account. Their implementations are shown below. The Operation enum: enum Operation { /** * deposit (add 阅读全文
posted @ 2020-09-09 13:46 longlong6296 阅读(233) 评论(0) 推荐(0)