TreeMap question

[javaHopeful]

I have perused this site frequently for advice. I am currently trying to learn java data structures. I hope someone can look at this and tell me what I'm doing wrong. When I try to compile the code I receive substantial errors, when I fix 6 I get 10 more. Currently I am receiving some of the following errors.
When I try to pass my treemap to my methods I get incompatible type, then why I try to cast it as an object it tells me explicit cast needed. How can I pass my treemap to my methods?

I'm trying to figure this problem.

public class Employee 
{
    // Fields
    private String Name;
    private String ID;
    private double balance;


   // Three-parameter constructor
    public Employee(String n, String id, double bal)
    {		Name=n;
		ID=id;
		balance=bal;
	}
    
    public void setCustomerName(String s)
    {
		Name = s;
	}


	public void setID(String t)
	{
		ID = t;
	}


	public void setBalance(double bal)
	{
		balance = bal;
    	 }

   	 public String getName()
   	 {
      	  return Name;
    	}

   	 public String getID()
  	{
        return ID;
   	 }



    public double getBalance()
    {
        return balance;
    }

	

    public void printBalance()
    { System.out.println("\nBalance: " + balance );  }

    public String toString()
    {
		return "\nEmployee: " + Name + "  ID: " + ID + "  Balance: " + balance;
    }
	

}// end class


   import java.util.*;

public class EmployeeMap 
{	
	String getAcct;
	String remAcct;
	
	public static void main(String[]args)
{
	Object[] accts=new Object [6];//Create array of emp objects
	accts[0]=new Employee("Smith","1",1000);
	accts[1]=new Employee("Walters","2",3000);
	accts[2]=new Employee("Martin","3",6000);
	accts[3]=new Employee("Mann","4",8000);
	accts[4]=new Employee("Jenkins","5",7000);
	accts[5]=new Employee("Williams","6",9000);
	
	Map account=new TreeMap();//create treemap

	
		for(int i=0; i<accts.length; i++)//add  objects to treemap
		account.put(((Employee)accts[i]).getID(),accts[i]);


	Set acctSize=account.entrySet();

	System.out.println(&quot;Object \t\t\tkey\t\tvalue&quot;);

	for(Iterator j=acctSize.iterator(); j.hasNext();)//print objects from treemap
	{
	Map.Entry me=(Map.Entry)j.next();
	Object objKey=me.getKey();
	Object objValue=me.getValue();
	System.out.print(me +&quot;\t&quot;);
	System.out.print(objKey+&quot;\t&quot;);
	System.out.println(objValue);
	}
		findObj((Object)accts);
		removeObj((Object)accts);


}	

	

	public void printMap(String acct,Map m) //demonstrate  printMap method
	{
	Set entries=m.entrySet();
	Iterator itr=entries.iterator();
	
	System.out.println(&quot;Object \t\t\tkey\t\tvalue&quot;);

		while(itr.hasNext())
		{
		Map.Entry thisPair=(Map.Entry) itr.next();
		System.out.print(thisPair.getKey() + &quot;:&quot;);
		System.out.println(thisPair.getValue());
		}
	}
	
 	public void findObj (Map m)//Accept user input for map key and return values associated with the key
	{
		getAcct=Console.readString(&quot;Enter id to find values for:&quot;);
		Object o=accts.get((Object)getAcct);
			if(o==null)
		  	{	System.out.println(&quot;Id not found enter new number&quot;);		
				findObj();
			}
			else
				System.out.println(&quot;Values for &quot;+getAcct+&quot;are \n&quot;+o.getValue());
			
	
	}
	


	public void removeObj (Map m)//Accept user input for map key and remove values associated with the key
	{
		remAcct=Console.readString(&quot;Enter id to find values for:&quot;);
		Object o=accts.remove((Object)remAcct);
			if(o==null)
		  	{	System.out.println(&quot;Id not found enter new number&quot;);		
				removeObj();
			}
			else
				System.out.println(&quot;Values &quot;+remAcct+&quot;are \n&quot;+o.getValue()+&quot; will be removed.&quot;);
			
	
	}
	
	



}

 

[Stijn147]

There are still a lot of errors in your code!!

The main problem is that printMap, findObj and removeObj are non-static functions, those functions can only be applied on objects of the class EmployeeMap, while there arent any EmployeeMaps constructed.
I recommend a structure like this:
(there's also no need to make String getAcct and String remAcct members of EmployeeMap)

class EmployeeMap
{
Map account;

EmployeeMap()
{
account=new TreeMap();
}

public static void main(String[]args)
{
EmployeeMap mymap=new EmployeeMap();
mymap.findObj();
//....
}

public void printMap() {
//....
}

public void findObj () {
// ....
Object o=account.get((Object)getAcct);
// ....
}



public void removeObj ()
{
// ....
Object o=account.remove((Object)remAcct);
// ....
}
}