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Error Modding minecraft 1.12.2 please guys [closed]

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Item Creation Error (public class ItemsRegistry ) The nested type ItemsRegistry cannot hide an enclosing type.
package com.thedoffee.sd.registers;
public class ItemsRegistry {
#ObjectHolder("tut")
#Mod.EventBusSubscriber
public class ItemsRegistry {
#ObjectHolder("key")
public static final Item KEY = null;
#SubscribeEvent
public static void onRegistryItem(RegistryEvent.Register<Item> e) {
e.getRegistry().register(new ItemKey());
}
#SubscribeEvent
#SideOnly(Side.CLIENT)
public static void onRegistryModel(ModelRegistryEvent e) {
//
}
}
}

Write a constructor in class Doctor to initialize the private field doctor_name [closed]

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Write a constructor in class Doctor to initialize the private field doctor_name. How can I write this?
class Doctor{
public Doctor(private String doc_name){
}
}

Here is an example class Doctor with a constructor.
class Doctor{
private String doc_name;
Doctor(String doc_name){
this.doc_name = doc_name;
}
}
You can also add a setter and getter to apply encapsulation.
class Doctor{
private String doc_name;
Doctor(String doc_name) {
this.doc_name = doc_name;
}
public void setDoctorName(String doc_name) {
this.doc_name = doc_name;
}
public String getDoctorName() {
return this.doc_name;
}
}
I've made a simple implementation of the class Doctor.
class Main {
public static void main(String[] args) {
Doctor doctor1 = new Doctor("Someone");
System.out.println(doctor1.getDoctorName());
doctor1.setDoctorName("Someone Else");
System.out.println(doctor1.getDoctorName());
}
}
Output:
Someone
Someone Else

how to share a variable inside actionListener (java) [closed]

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I'm trying to make a preference menu and trying to share a variable that is inside action listener. Thanks in advance
public void actionPerformed(ActionEvent e) {
if(e.getSource()==buttonp1) {
player_c=c1.getText();
if(player_c.equalsIgnoreCase("blue")) {
p1_color="blue";
//i want to share a String with another class.
}
if(player_c.equalsIgnoreCase("red")) {
p1_color="red";
}
if(player_c.equalsIgnoreCase("green")) {
p1_color="green";
}
}
}

Move the variable to a different class, and pass an instance to the listener (probably by lexical scope).
class Player {
private String color;
// ...
public void setColor(String color) {
this.color = Objects.requireNonNull(color);
}
}
// ...
Player p1 = ...;
// (Watch the repetition.)
blue.addActionListener(event -> {
p1.setColor("blue");
});
red.addActionListener(event -> {
p1.setColor("red");
});
green.addActionListener(event -> {
p1.setColor("green");
});
// ...

Java return Object [closed]

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I don’t know how to return the value of the string here, in short, I need the output of this string that is stored in the function:
public Object Directory(String directory) {
String directory1 = "directory";
return directory1;
}
public static void main(String... args) throws Exception {
System.out.println(directory1);
}
This is my interface in another file:
public interface Interface extends Remote {
Object FileName(String filename) throws RemoteException;
Object Directory(String directory) throws RemoteException;
}

If I understand you. You can try so.
public static String Directory(String directory) {
String directory1 = "directory";
return directory1;
}
public static void main(String... args) throws Exception {
System.out.println(Directory("directory1"));
}

In Java you must declare the return type of a function. In your case you have defined the return type of Object when you really want a return type of String

print method for Generic Stack in java [closed]

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I have a problem finding a solution for this peculiar problem.
I have this class of a generic Stack.
class Pilita<T> {
private int tam;
private T[] arregloPila;
private int tope;
#SuppressWarnings("unchecked")
public Pilita(int tam) {
this.tam=tam;
arregloPila=(T[])new Object[tam];
tope=-1;
}
public void push(T valor){
if(pilaLlena()){
throw new StackFullException("No se puede meter el: "+"["+valor+"]"+" La pila esta llena");
}
arregloPila[++tope]=valor;
}
public T pop() {
if(pilaVacia()){
throw new StackEmptyException("La pila esta vacia");
}
return arregloPila[tope--];
}
public boolean pilaVacia(){
return (tope == -1);
}
public boolean pilaLlena(){
return (tope==tam-1);
}
public int contar(){
return(tope+1);
}
And I want to know how to implement a method to print the stack, because i have a method for normal stacks, but it doesn't seems to work with Generic Stack.
Any help would be Helpful.

To print the all the stack, you only need to check if the stack is not empty
public static void main(String[] args) {
Pilita pila = new Pilita(3);
pila.push("1");
pila.push("2");
pila.push("3");
while (!pila.pilaVacia()) {
System.out.println("Pil pop " + pila.pop());
}
}