This article shares the specific code of the Java address book system for your reference. The specific content is as follows
import java.util.Scanner;class Person { String name; String number; }class connect{ Person a[]; int number; public connect() { a=new Person[100]; number=0; } public String add(String name,String number) { if(number == "0") System.out.println("Please add the contact first!"); if(this.number>99) return "Add failed"; a[this.number]=new Person(); a[this.number].name=name; a[this.number].number=number; this.number++; return "Add successfully"; } public Person seek(String name) { if(number == 0) System.out.println("Please add contact first!"); for(int i=0;i<number;i++) { if((a[i].name).equals(name)) { System.out.println("Contact: "+a[i].name+" Phone: "+a[i].number); return a[i]; } } return null; } public void look() { if(number == 0) System.out.println("Please add contact first!"); for(int i=0;i<number;i++) { System.out.println("Contact"+a[i].name+" Phone"+a[i].number); } } public String delete(String name) { if(number == 0) System.out.println("Please add contact first:"); for(int i=0;i<number;i++) { if((a[i].name).equals(name)) { a[i]=a[this.number-1]; number=number-1; return "Delete successfully"; } } return "Delete failed"; }}public class text1{ public static void main(String[]args) { Scanner sc=new Scanner(System.in); Scanner input = new Scanner(System.in); System.out.println("/t/t/t welcome to use address book system/n"); System.out.println("/t/t/t1.Create user/n/n/t/t/t2.Exit/n"); System.out.println("______________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________ System.out.println("/t/t/t3.Add/n");System.out.println("/t/t/t4.Delete/n");System.out.println("/t/t/t5.Exit/n");System.out.println("Please select the corresponding option: "); System.out.println("Input instruction: "); int num1 = input.nextInt(); switch (num1) { case 1:c.look();break; case 2: { System.out.println("Input the name of the search: "); String n1 = sc.next();c.seek(n1); }break; case 3: { System.out.println("Input the number of people to add: "); System.out.println("enter:"); int s=sc.nextInt(); for(int i=0;i<s;i++) { System.out.println("Please enter the name of the individual "+(i+1)+": "); String name=sc.next(); String number=sc.next(); c.add(name,number); } }break; case 4: { System.out.println("Input the deleted name: "); String n3 = sc.next();c.delete(n3); }break; default: { System.out.println("/t/t/t Thank you for your use/n"); System.exit(0); } } } break; case 2:System.out.println("/t/t/t Thank you for your use/n"); break; default:System.out.println("Input is incorrect!");num2=2; } } }} The above is all the content of this article. I hope it will be helpful to everyone's learning and I hope everyone will support Wulin.com more.