StockList Class • This class will contain the methods necessary to display various information about the stock data. • This class shall be a subclass of ArrayList. • This class shall not contain any data fields. (You don't need them for this class if done correctly). . This class shall have a default constructor with no parameters. o No other constructors are allowed. • This class shall have the following public, non-static, methods: • printAllStocks: This method shall take no parameters and return nothing. ▪ This method should print each stock in the StockList to an output file. ▪ NOTE: This method shall NOT print the data to the console. ▪ The output file shall be called all_stock_data.txt. The data should be printed in a nice and easy to read format. o displayFirstTenStocks: ▪ This method shall take no parameters and return nothing. . This method should display only the first 10 stocks in the StockList in a nice and easy to read ▪ This method should display the data in the console. o displayLastTenStocks: This method shall take no parameters and return nothing. ▪ This method should display only the last 10 stocks in the StockList in a nice and easy to read . This method should display the data in the console. computeAverageOpeningPrice: ▪ This method shall take no parameters and return a double value. This method should compute and return the average opening price of all stock data in the Sto o computeAverageClosing Price: ▪ This method shall take no parameters and return a double value. This method should compute and return the average opening price of all stock data in the Sto o findMaxHighPrice: ▪ This method shall take no parameters and return a single TeslaStock object. . This method should compute and return the maximum high price of all the stock data.
StockList Class • This class will contain the methods necessary to display various information about the stock data. • This class shall be a subclass of ArrayList. • This class shall not contain any data fields. (You don't need them for this class if done correctly). . This class shall have a default constructor with no parameters. o No other constructors are allowed. • This class shall have the following public, non-static, methods: • printAllStocks: This method shall take no parameters and return nothing. ▪ This method should print each stock in the StockList to an output file. ▪ NOTE: This method shall NOT print the data to the console. ▪ The output file shall be called all_stock_data.txt. The data should be printed in a nice and easy to read format. o displayFirstTenStocks: ▪ This method shall take no parameters and return nothing. . This method should display only the first 10 stocks in the StockList in a nice and easy to read ▪ This method should display the data in the console. o displayLastTenStocks: This method shall take no parameters and return nothing. ▪ This method should display only the last 10 stocks in the StockList in a nice and easy to read . This method should display the data in the console. computeAverageOpeningPrice: ▪ This method shall take no parameters and return a double value. This method should compute and return the average opening price of all stock data in the Sto o computeAverageClosing Price: ▪ This method shall take no parameters and return a double value. This method should compute and return the average opening price of all stock data in the Sto o findMaxHighPrice: ▪ This method shall take no parameters and return a single TeslaStock object. . This method should compute and return the maximum high price of all the stock data.
Database System Concepts
7th Edition
ISBN:9780078022159
Author:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan
Publisher:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan
Chapter1: Introduction
Section: Chapter Questions
Problem 1PE
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Transcribed Image Text:StockList Class
• This class will contain the methods necessary to display various information about the stock data.
• This class shall be a subclass of ArrayList<TeslaStock>.
• This class shall not contain any data fields. (You don't need them for this class if done correctly).
• This class shall have a default constructor with no parameters.
o No other constructors are allowed.
• This class shall have the following public, non-static, methods:
• printAllStocks:
This method shall take no parameters and return nothing.
▪ This method should print each stock in the StockList to an output file.
▪ NOTE: This method shall NOT print the data to the console.
The output file shall be called all_stock_data.txt.
The data should be printed in a nice and easy to read format.
o displayFirstTenStocks:
This method shall take no parameters and return nothing.
▪ This method should display only the first 10 stocks in the StockList in a nice and easy to read format.
▪ This method should display the data in the console.
o displayLastTenStocks:
I
I
This method shall take no parameters and return nothing.
▪ This method should display only the last 10 stocks in the StockList in a nice and easy to read format.
This method should display the data in the console.
■
• computeAverageOpeningPrice:
This method shall take no parameters and return a double value.
. This method should compute and return the average opening price of all stock data in the StockList.
• computeAverageClosingPrice:
This method shall take no parameters and return a double value.
This method should compute and return the average opening price of all stock data in the StockList.
o findMaxHigh Price:
This method shall take no parameters and return a single TeslaStock object.
▪ This method should compute and return the maximum high price of all the stock data.
■
■
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