JAVA EXAM3 复习提纲

Posted 2021-01-18 排序和map

【Practice11_Zipcode_ArrayList】 

Zipcode class:

//3 variables: zipcode, city, county, and compare by county

 

County:

//two variables: county and count, and define the getters & setters

 

Main:

//1.read the files, 

//no need to define here since it was passed later on

 

//2.

ZipcodeComparator:

compare the zipcode by the county?

 

//2.

CountyComparator:

compare the county by their count

 

//read file by passing into file‘s name

//define two lists to use

//3 initialize zipcode

//sort the list using the Collections.sort

//4 initialize cities

//append the new county‘s name to the string‘s name

//split up all the country words, 5.count the zipcode

//new up a number list to store the number accounts

//count the numbers one by one

//append the count to the number list

//new up a county object and add it to the state list 6. count the cities

//sort after appended to the list using Collections.sort

//print out the state‘s names

【Zipcode Hashmap】

 zipmap: 

//initialize variables : city/country/zipcode, same constructor

 

main:

//split the words and set up zipmap object

//dirty number? add only if they equal in both city and county

//add to indicate duplication for further query

//just one city/county equal?

//using printf to format output

 

 

【movie】

 

 

Genre class:

//define variables: string and arraylist

//define compare to method and compare via one variable

 

 

//if o comes later, from small to big

 

//override the hashcode method

//override the equals method

 

Movie class:

same

 

MyFlix class：

//loadMovies：

load movie information and the movie genres information

//loadGenres://use iterator to parse all the movies, //get next movie, //get next genre,

//if not contain the genre, add to the new list,

//if contains the genre, add to the list

//rewrite, add to result if it contains

 

//rewrite: print by using iteration

 

【words】

 

 

Word: 

//define toString here : word + ": " + meaning

 

//should notice the lower case situation

Dictionary class:

//re: put into map according to the requirement

 

//get a new word

//add up on

//or add a new list

 

searchWordList:

//re: find in the wordList, use found variable to controll

 

searchMultiMap

//print out the results found in the map