java小程序數組版電話本1.0版本（有問題尚未解決）

主函數：

package www.telephone.java;

import java.util.Scanner;

/*
 * 電話簿主要實現功能：
 * 1.添加 2.刪除 3.修改 4.查詢所有 5.根據姓名查詢 6.退出
 * */
public class TelephoneNumberMain {

	public static void main(String[] args) {
		TelephoneBook telephoneBook = new TelephoneBook();
		telephoneBook.choose();
	}
}

方法主體，電話本增刪改查：

package www.telephone.java;


import java.util.Scanner;


import com.sun.org.apache.bcel.internal.generic.INEG;


public class TelephoneBook {
	Contacts[] c = new Contacts[50];


	TelephoneNumberMain telephoneNumberMain = new TelephoneNumberMain();
	int num; // 聯繫人個數
	// 添加聯繫人


	public void choose() {
		Scanner sc = new Scanner(System.in);
		System.out.println("----------------電話本管理系統----------------");
		System.out.println("1.添加 2.刪除 3.修改 4.查詢所有 5.根據姓名查詢 0.退出");
		System.out.println("----------------電話本管理系統----------------\n 請選擇操作：");
		String a = sc.next();
		switch (a) {
		case "1":
			pAdd();
			break;
		case "2":
			pDelete();
			break;
		case "3":
			pChange();
			break;
		case "4":
			selectAll();
			break;
		case "5":
			selectByName();
			break;
		case "0":
			System.out.println("感謝你的使用。");
			System.exit(0);
			break;
		default:
			System.out.println("輸入指令錯誤！請重新輸入！");
			break;
		}
	}


	public void pAdd() {
		System.out.println("------添加聯繫人------");
		System.out.println("請輸入相關信息：");
		Contacts con = new Contacts();
		Scanner sc = new Scanner(System.in);
		System.out.print("姓名：");
		String name = sc.nextLine();
		con.setName(name);
		System.out.print("性別：");
		String sex = sc.nextLine();
		con.setSex(sex.charAt(0));
		System.out.print("年齡：");
		int age = sc.nextInt();
		con.setAge(age);
		sc = new Scanner(System.in);
		System.out.print("電話：");
		String phone = sc.nextLine();
		con.setPhoneNumber(phone);
		System.out.print("QQ：");
		int qqNumber = sc.nextInt();
		con.setQqNumber(qqNumber);
		sc = new Scanner(System.in);
		System.out.print("地址：");
		String address = sc.nextLine();
		con.setAddress(address);
		System.out.println(con);


		for (int num = 0; num < c.length; num++) {
			if (c[num] == null) {
				c[num] = con;
				break;
			} else {
				continue;
			}
		}
		// c[num++] = contacts;
		System.out.println("插入成功");
		System.out.println(con.toString());
		choose();
	}


	// 刪除聯繫人
	public void pDelete() {
		System.out.println("------刪除聯繫人------");
		System.out.println("請輸入你要刪除的聯繫人姓名：");
		Scanner sc = new Scanner(System.in);
		String s = sc.next();
		for (int num = 0; num < c.length; num++) {
			if (c[num] != null) {
				if (c[num].getName().equals(s)) {
					System.out.println("你要刪除的是：" + c[num].toString());
					System.out.println("你確定要刪除嗎？\n [1]確定，[0]取消");
					int s2 = sc.nextInt();
					if (s2 == 1) {
						c[num] = null;
						System.out.println("刪除成功！");
						try {
							Thread.sleep(2000);
						} catch (InterruptedException e) {
							// TODO Auto-generated catch block
							e.printStackTrace();
						}
						choose();
					} else if (sc.next().equals("n")) {
						choose();
					} else {
						System.out.println("輸入指令不正確，請重新輸入！");
						pDelete();
					}
				} else {
					if (num != c.length - 1) {
						continue;
					} else {
						System.out.println("你輸入的姓名不存在！請重新輸入！");
						pDelete();
					}
				}
			} else {
				if (num != c.length - 1) {
					continue;
				} else {
					System.out.println("你輸入的姓名不存在！請重新輸入！");
					pDelete();
				}
			}
		}
	}


	public void pChange() {
		Scanner sc = new Scanner(System.in);
		System.out.println("--------------修改電話本-------------");
		System.out.println("請輸入你要修改的姓名：");
		String s = sc.next();
		out: for (int num = 0; num < c.length; num++) {
			if (c[num] != null) {
				if (c[num].getName().equals(s)) {
					System.out.println("你要修改的是：" + c[num].toString());
					System.out.println("請重新輸入相關信息：");
					System.out.print("姓名：");
					String name = sc.next();
					c[num].setName(name);
					System.out.print("性別:");
					String sex = sc.next();
					c[num].setSex(sex.charAt(0));
					System.out.print("年齡:");
					int age = sc.nextInt();
					c[num].setAge(age);
					System.out.print("電話:");
					String dianhua = sc.next();
					c[num].setPhoneNumber(dianhua);
					System.out.print("QQ:");
					int qqNumber = sc.nextInt();
					c[num].setQqNumber(qqNumber);
					System.out.print("地址：");
					String address = sc.next();
					c[num].setAddress(address);
					;
					System.out.print("修改成功！");
					System.out.println("修改後爲：" + c[num].toString());
					try {
						Thread.sleep(2000);
					} catch (InterruptedException e) {
						// TODO Auto-generated catch block
						e.printStackTrace();
					}
					choose();
				} else {
					if (num != c.length - 1) {
						continue out;
					} else {
						System.out.println("你輸入的姓名不存在！請重新輸入！");
						pChange();
					}
				}
			} else {
				if (num != c.length - 1) {
					continue out;
				} else {
					System.out.println("你輸入的姓名不存在！請重新輸入！");
					pChange();
				}
			}
		}
	}


	// 查詢所有方法
	public void selectAll() {
		System.out.println(c[1]);
		System.out.println("--------------所有電話信息---------------");
		for (int num = 0; num < c.length; num++) {
			if (c[num] != null) {
				System.out.println(c[num].toString());
			}


		}
		try {
			Thread.sleep(2000);
		} catch (InterruptedException e) {
			// TODO Auto-generated catch block
			e.printStackTrace();
		}
		choose();
	}


	public void selectByName() {
		Scanner sc = new Scanner(System.in);
		System.out.println("------------------根據名字查詢----------------");
		System.out.println("請輸入你要查找的名字：");
		String s = sc.next();
		for (int num = 0; num < c.length; num++) {
			if (c[num] != null) {
				if (c[num].getName().equals(s)) {
					System.out.println("查詢結果爲：" + c[num].toString());
					try {
						Thread.sleep(2000);
					} catch (InterruptedException e) {
						// TODO Auto-generated catch block
						e.printStackTrace();
					}
					choose();
					break;
				} else {
					if (num != c.length - 1) {
						continue;
					} else {
						System.out.println("你輸入的姓名不存在！請重新輸入！");
						selectByName();
					}
				}
			} else {
				if (num != c.length - 1) {
					continue;
				} else {
					System.out.println("你輸入的姓名不存在！請重新輸入！");
					selectByName();
				}
			}
		}
	}
}

構建內部類實現getset方法以及toString方法：

package www.telephone.java;

public class Contacts {
	TelephoneBook telephoneBook = new TelephoneBook();
	private String name;// 聯繫人姓名
	private char sex;// 聯繫人性別
	private int age; // 聯繫人年齡
	private String phoneNumber; // 聯繫人電話
	private int qqNumber;// 聯繫人QQ號
	private String address;// 聯繫人地址

	public String getName() {
		return name;
	}

	public void setName(String name) {
		this.name = name;
	}

	public char getSex() {
		return sex;
	}

	public void setSex(char sex) {
		if (sex != '男' && sex != '女') {
			System.out.println("請輸入‘男’或‘女’。");
			telephoneBook.pAdd();
		} else {
			this.sex = sex;
		}
	}

	public int getAge() {
		return age;
	}

	public void setAge(int age) {
		if (age >= 0 && age <= 150) {
			this.age = age;
		} else {
			System.out.println("請輸入正確的年齡");
			telephoneBook.pAdd();
		}

	}

	public String getPhoneNumber() {
		return phoneNumber;
	}

	public void setPhoneNumber(String phoneNumber) {
		this.phoneNumber = phoneNumber;
	}

	public int getQqNumber() {
		return qqNumber;
	}

	public void setQqNumber(int qqNumber) {
		this.qqNumber = qqNumber;
	}

	public String getAddress() {
		return address;
	}

	public void setAddress(String address) {
		this.address = address;
	}

	@Override
	public String toString() {
		return "電話簿 [姓名=" + name + ", 性別=" + sex + ", 年齡=" + age + ", 電話號碼=" + phoneNumber + ", QQ號=" + qqNumber
				+ ", 地址=" + address + "]";
	}

}