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请帮忙！无法在 java 的电话簿中添加删除联系人方法。这样当输入人名时，文本文件中的联系人就会被删除。代码中没有错误，但删除方法不起作用。文本文件也在那里，其中包含人员的姓名和号码。代码如下。请帮我添加这个方法。

这是 Phone_book.java 类：

import java.io.*;
import java.util.*;
class Entry {
public String name, number, notes;
}
public class Phone_Book {
    public static Entry[] contactList = new Entry[200];
    public static int num_entries;
    public static Scanner stdin = new Scanner(System.in);
    public static Object entryList;
    public static void readPhone_Book(String Phonebook) throws Exception {
    File phonebook;
    phonebook = new File(Phonebook);
    Scanner S = new Scanner(phonebook);
    while (S.hasNext()) {
        contactList[num_entries] = new Entry();
        contactList[num_entries].name = S.nextLine();
        contactList[num_entries].number = S.nextLine();
        contactList[num_entries].notes = S.nextLine();
        num_entries++;
    }
    S.close();
}
public static void addContact() {
    String name = GUIphonebook.txtName.getText();
    String number = GUIphonebook.txtNumber.getText();
    String notes = GUIphonebook.txtNotes.getText();
    contactList[num_entries] = new Entry();
    contactList[num_entries].name = name;
    contactList[num_entries].number = number;
    contactList[num_entries].notes = notes;
    num_entries++;
}

public static void deleteContact()
{
   
        for (int i = 0; i < num_entries; i++)
        {
            contactList[i] = contactList[i+1];         
        }

        num_entries--;

    }

public static int find(String Name) {
    for (int i = 0; i < num_entries; i++) {
        if (contactList[i].name.equalsIgnoreCase(Name))
            return i;
    }
    return -1;
}
public static void displayContact() {
    String name = GUIphonebook.txtName.getText();
    int x = find(name);
    String name1 = contactList[x].name;
    String number = contactList[x].number;
    String notes = contactList[x].notes;
    GUIphonebook.txtName.setText(name1);
    GUIphonebook.txtNumber.setText(number);
    GUIphonebook.txtNotes.setText(notes);
}
public static void listAllContacts() {
    String all = "";
    int i = 0;
    while (i < num_entries) {
        all = all
                + (contactList[i].name + "\n" + contactList[i].number
                + "\n" + contactList[i].notes + "\n" + "\n");
        i++;
    }
    GUIphonebook.txtAll.setText(all);
}
public static void sortList() {
    int i;
    Entry temp;
    temp = new Entry();
    for (int j = 0; j < num_entries; j++) {
        for (i = j + 1; i < num_entries; i++) {
            if (contactList[j].name.compareToIgnoreCase(contactList[i].name) > 0) {
                temp = contactList[j];
                contactList[j] = contactList[i];
                contactList[i] = temp;
            }
        }
    }
}
public static void CopyPhoneBookToFile(String FileName) throws Exception {
    FileOutputStream out = new FileOutputStream(FileName);
    PrintStream P = new PrintStream(out);
    for (int i = 0; i < num_entries; i++) {
        P.println(contactList[i].name);
        P.println(contactList[i].number);
        P.println(contactList[i].notes);
    }
}
}
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