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douglasjd1douglasjd1
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task helper silver
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‎SimpleQueue/src/com/company/TaskHelper.java‎

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package com.company;
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import java.util.LinkedList;
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import java.util.Queue;
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import java.util.Scanner;
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public class TaskHelper
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{
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Queue<String> tasks = new LinkedList<>();
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public static void main(String[] args)
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{
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TaskHelper taskHelper = new TaskHelper();
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taskHelper.run();
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}
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public void run()
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{
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String command = "";
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System.out.println("Welcome to the task manager. Here are a list of commands. At any time, enter PrintCommmands to view the commands.");
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printCommands();
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try
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{
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do
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{
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Scanner scanner = new Scanner(System.in);
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String commandLine = scanner.nextLine();
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String[] commands = commandLine.split(" ");
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command = commands[0].toUpperCase();
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if (command.equals("ADD"))
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{
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if(commands.length >= 2)
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{
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addTask(commands);
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}
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else
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{
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System.out.println("I have to know what task to add. Enter some tasks this time.");
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}
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}
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else if (command.equals("PEEK"))
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{
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int numTasks = 0;
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if (commands.length == 2)
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{
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numTasks = Integer.valueOf(commands[1]);
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peek(numTasks, tasks);
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}
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else if(commands.length == 1)
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{
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peek(numTasks, tasks);
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}
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else
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{
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System.out.println("Invalid input. Enter Peek, then one number.");
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}
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}
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else if (command.equals("REMOVE"))
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{
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int numTasks = 0;
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if (commands.length == 2)
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{
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numTasks = Integer.valueOf(commands[1]);
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remove(numTasks);
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}
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else if(commands.length == 1)
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{
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remove(numTasks);
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}
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else
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{
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System.out.println("Invalid input. Enter Remove, then one number.");
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}
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}
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else if (command.equals("HOWMANY"))
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{
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howMany();
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}
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else if(command.equals("PRINTCOMMANDS"))
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{
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printCommands();
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}
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else if (command.equals("FLEE"))
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{
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flee();
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}
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else if (command.equals("EXIT"))
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{
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exit();
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}
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else
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{
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System.out.println("Invalid command.");
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}
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if(!command.equals("EXIT"))
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System.out.print("Enter another command:");
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} while (!command.equals("EXIT"));
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}
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catch(Exception e)
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{
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System.out.println("Invalid input. Try another command.");
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}
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}
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public void printCommands()
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{
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System.out.println("Add <TaskName> <TaskName> ...");
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System.out.println("Peek");
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System.out.println("Remove");
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System.out.println("HowMany");
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System.out.println("Flee");
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}
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public void addTask(String[] taskNames)
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{
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for(int i = 1;i < taskNames.length;i++)
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{
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tasks.add(taskNames[i]);
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System.out.println("Added " + taskNames[i] + " to the list of tasks.");
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}
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}
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public void peek(int numTasks, Queue<String> holder)
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{
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if(tasks.size() == 1 && numTasks == 0)
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System.out.println("The next task is " + tasks.peek());
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else if(tasks.size() == 0)
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{
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System.out.println("There are no tasks in the list.");
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}
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else if(tasks.size() > 1 && numTasks <= tasks.size())
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{
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holder = new LinkedList<>();
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for(String task : tasks)
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{
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holder.add(task);
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}
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System.out.println("The next " + numTasks + " tasks are: ");
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for(int i = 0;i < numTasks;i++)
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{
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System.out.println(holder.poll());
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}
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}
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else if(numTasks > tasks.size())
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{
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System.out.println("There aren't that many tasks in the list.");
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}
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else
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System.out.println("There are no tasks left in the list.");
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}
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public void remove(int numTasks)
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{
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if(tasks.size() == 1)
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{
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System.out.println("Removed " + tasks.peek() + " from the list.");
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tasks.remove();
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}
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else if(tasks.size() > 1 && numTasks <= tasks.size())
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{
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System.out.println("Removed the following tasks: ");
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for(int i = 0;i < numTasks;i++)
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{
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System.out.println(tasks.remove());
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}
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}
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else if(numTasks > tasks.size())
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{
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System.out.println("There aren't that many tasks in the list.");
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}
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else
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System.out.println("There are no tasks left in the list.");
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}
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public void howMany()
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{
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System.out.println("Tasks left to be completed: " + tasks.size());
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}
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public void flee()
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{
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tasks.clear();
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System.out.println("All tasks have been cleared from the list.");
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}
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public void exit()
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{
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System.out.println("Thank you for using this task manager. Goodbye.");
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}
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}

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