The document discusses the creation of an abstract class in Java for representing a department structure, including attributes for the number of members and projects, as well as methods for displaying details and adding projects. It provides examples of a 'mobile' department extending the abstract class and outlines the attributes and members of the 'ace company' with detailed department information. Additionally, it shows issues in the code, highlighting the need for correct method overrides and project management within the department classes.

1. I'm writing an abstract class in java right now for this json file and I'm not too sure why my code
is wrong.
7 usages int numMember; // number of members in Department 9 usages int numProject; //
number of currently working projects 2 usages private Project[] projects; // currently working
projects 1 usage private Employee[] members; // employees working in the department 7 usages
Employee leader; // leader of department 6 usages public Department(int numMember, int
numProject, Project[] projects, Employee[] members, Employee leader) { this. numMember =
numMember; this.numProject = numProject; this.projects = projects; this.members = members;
this. .eader = leader; } 6 implementations public abstract void displayDetails(); 4
implementations abstract void addProjects(Project newProject); // more attributes if necessary
class Mobile extends Department { public Mobile(int numMember, int numProject, Project[]
projects, Employee[] members, Employee leader) { super(numMember, numProject,projects,
members, leader); // more attributes if necessary class Mobile extends Department { public
Mobile(int numMember, int numProject, Project[] projects, Employee[] members, Employee
leader) { super (numMember, numProject, projects, members, leader);
} @override public void displayDetails() { System.out.println("Members: " + numMember);
System.out.println("Number of Projects: " + numProject); System.out.println("Leader: " +
leader); } Qoverride void addProjects(Project newProject) { projects [numProject ]=
newProject; numProject++; System.out.println("Project added to Mobile Department: " +
newProject.getProjectName()); } }
"Name": "ACE Company", "Year": "2001", "CEO": "Ontaria Laker", "Number of Departments":
6, "Number of Employees": 7, "Departments": [ { "Name": "Mobile", "Leader": "David
Collins", "Number of Current Working Projects": 1, "Projects": ["ACE App"] },{ "Name":
"Test", "Leader": "Alice Wonderland", "Number of Current Working Projects": 0 , "Projects": []
},{ "Name": "Game", "Leader": "Hulk Hogan", "Number of Current Working Projects": 1,
"Projects": ["Ace Ventura"] },{ "Name": "Web", "Leader": "Bruce Duster", "Number of
Current Working Projects": 3, "Projects": ["ACE Platform", "ACE App", "ACE Support"] },{
"Name": "Maintenance",
},{ "Name": "Maintenance", "Leader": "Donald Kennedy", "Number of Current Working
Projects": 2, "Projects": ["ACE Platform", "ACE Support"] },{ "Name": "Service", "Leader":
"Lauren Liu", "Number of Current Working Projects": 1, "Projects": ["ACE Support"] } },{
"Name": "Maintenance", "Leader": "Donald Kennedy", "Number of Current Working Projects":

2. 2, "Projects": ["ACE Platform", "ACE Support"] },{ "Name": "Service", "Leader": "Lauren
Liu", "Number of Current Working Projects": 1, "Projects": ["ACE Support"] }