In Java, how can I get the example code to implement commands based on user input?

Here's the example code so far along with screenshots of the commands needed:

package com.app;

import java.util.Scanner;

import org.json.simple.$*$;

public class EgyptianPyramidsAppExample $\{$

protected Pharaoh$[]$ pharaohArray;

protected Pyramid$[]$ pyramidArray;

public static void main$($String$[]$ args$)\{$

$//$ create and start the app

EgyptianPyramidsAppExample app $=$ new EgyptianPyramidsAppExample$()$;

app.start$()$;

$\}$

$//$ main loop for app

public void start$()\{$

Scanner scan $=$ new Scanner$($System$.$in$)$;

Character command $=\text{'}\_\text{'}$;

$//$ loop until user quits

while $($command $!=\text{'}$q$\text{'})\{$

printMenu$()$;

System.out.print$("$Enter a command: $")$;

command $=$ menuGetCommand$($scan$)$;

executeCommand$($scan$,$ command$)$;

$\}$

$\}$

$//$ constructor to initialize the app and read commands

public EgyptianPyramidsAppExample$()\{$

$//$ read egyptian pharaohs

String pharaohFile $="/$Users$/$envyi$/$Documents$/$GitHub$/$Pyramid$\_$App$/$pyramid$\_$app$/$src$/$main$/$java$/$com$/$app$/$pharaoh$.$json";

JSONArray pharaohJSONArray $=$ JSONFile.readArray$($pharaohFile$)$;

$//$ create and intialize the pharaoh array initializePharaoh$($pharaohJSONArray$)$;

$//$ read pyramids String pyramidFile $="/$Users$/$envyi$/$Documents$/$GitHub$/$Pyramid$\_$App$/$pyramid$\_$app$/$src$/$main$/$java$/$com$/$app$/$pyramid$.$json";

JSONArray pyramidJSONArray $=$ JSONFile.readArray$($pyramidFile$)$;

$//$ create and initialize the pyramid array initializePyramid$($pyramidJSONArray$)$;

$\}$

$//$ initialize the pharaoh array

private void initializePharaoh$($JSONArray pharaohJSONArray$)\{$

$//$ create array and hash map

pharaohArray $=$ new Pharaoh$[$pharaohJSONArray$.$size$()]$;

$//$ initalize the array

for $($int i $=0$; i $$ pharaohJSONArray.size$()$; i$++)\{$

$//$ get the object JSONObject o $=($JSONObject$)$ pharaohJSONArray.get$($i$)$;

$//$ parse the json object

Integer id $=$ toInteger$($o$,"$id$")$;

String name $=$ o$.$get$("$name$").$toString$()$;

Integer begin $=$ toInteger$($o$,$ "begin"$)$;

Integer end $=$ toInteger$($o$,$ "end"$)$;

Integer contribution $=$ toInteger$($o$,$ "contribution"$)$;

String hieroglyphic $=$ o$.$get$("$hieroglyphic$").$toString$()$;

$//$ add a new pharoah to array Pharaoh p $=$ new Pharaoh$($id$,$ name, begin, end, contribution, hieroglyphic$)$; pharaohArray$[$i$]=$ p; $\}\}//$ initialize the pyramid array private void initializePyramid$($JSONArray pyramidJSONArray$)\{$

$//$ create array and hash map

pyramidArray $=$ new Pyramid$[$pyramidJSONArray$.$size$()]$;

$//$ initalize the array for $($int i $=0$; i $$ pyramidJSONArray.size$()$; i$++)\{$

$//$ get the object JSONObject o $=($JSONObject$)$ pyramidJSONArray.get$($i$)$;

$//$ parse the json object Integer id $=$ toInteger$($o$,"$id$")$;

String name $=$ o$.$get$("$name$").$toString$()$;

JSONArray contributorsJSONArray $=($JSONArray$)$ o$.$get$("$contributors$")$; String$[]$ contributors $=$ new String$[$contributorsJSONArray$.$size$()]$;

for $($int j $=0$; j $$ contributorsJSONArray.size$()$; j$++)\{$

String c $=$ contributorsJSONArray.get$($j$).$toString$()$; contributors$[$j$]=$ c; $\}$

$//$ add a new pyramid to array Pyramid p $=$ new Pyramid$($id$,$ name, contributors$)$; pyramidArray$[$i$]=$ p; $\}\}//$ get a integer from a json object, and parse it private Integer toInteger$($JSONObject o$,$ String key$)\{$ String s $=$ o$.$get$($key$).$toString$()$; Integer result $=$ Integer.parseInt$($s$)$; return result; $\}$

$//$ get first character from input private static Character menuGetCommand$($Scanner scan$)\{$ Character command $=\text{'}\_\text{'}$; String rawInput $=$ scan.nextLine$()$; if $($rawInput$.$length$()>0)\{$ rawInput $=$ rawInput.toLowerCase$()$; command $=$ rawInput.charAt$(0)$; $\}$ return command; $\}//$ print all pharaohs private void printAllPharaoh$()\{$ for $($int i $=0$; i $$ pharaohArray.length; i$++)\{$ printMenuLine$()$; pharaohArray$[$i$].$print$()$; printMenuLine$()$; $\}\}$ private Boolean executeCommand$($Scanner scan, Character command$)\{$ Boolean success $=$ true; switch $($command$)\{$ case $\text{'}1\text{'}$: printAllPharaoh$()$; break; case $\text{'}$q$\text{'}$: System.out.println$("$Thank you for using Nassef's Egyptian Pyramid App!"$)$; break; default: System.out.println$("$ERROR: Unknown commmand"$)$; success $=$ false; $\}$ return success; $\}$ private static void printMenuCommand$($Character command, String desc$)\{$ System.out.printf$("\%$s$\backslash$t$\backslash$t$\%$s

$",$ command, desc$)$; $\}$ private static void printMenuLine$()\{$ System.out.println$("--------------------------------------------------------------------------")$;

$\}$

The app has the following commands and functionality:

The menu once implemented