import java.util.
Scanner;
import java.util.Vector;
public class Main {
Vector<String> nameVector = new Vector();
Vector<String> emailVector = new Vector();
Vector<Integer> ageVector = new Vector();
Scanner scan;
String name;
String email;
int age;
int menu;
public void delete() {
int delete = true;
System.out.print("Choose number you want to delete : ");
int delete = this.scan.nextInt();
this.scan.nextLine();
this.nameVector.remove(delete - 1);
this.emailVector.remove(delete - 1);
this.ageVector.remove(delete - 1);
}
public void update() {
int update = true;
System.out.print("Choose number you want to update : ");
int update = this.scan.nextInt();
this.scan.nextLine();
System.out.println("Student you want to update : ");
System.out.println("Name : " + (String)this.nameVector.get(update - 1));
System.out.println("Email : " + (String)this.emailVector.get(update - 1));
System.out.println("Age : " + this.ageVector.get(update - 1));
System.out.println("Please update the data : ");
do {
do {
System.out.print("Input student's name [5-10 Characters]: ");
this.name = this.scan.nextLine();
} while(this.name.length() < 5);
} while(this.name.length() > 10);
do {
System.out.print("Input student's email [Must be ended with
'@gmail.com']: ");
this.email = this.scan.nextLine();
} while(!this.email.endsWith("@gmail.com"));
do {
System.out.print("Input student's age [Must be greater than 15]: ");
try {
this.age = this.scan.nextInt();
this.scan.nextLine();
} catch (Exception var3) {
System.out.println("System Error ! Must be number !");
}
} while(this.age <= 14);
this.nameVector.set(update - 1, this.name);
this.emailVector.set(update - 1, this.email);
this.ageVector.set(update - 1, this.age);
}
public void mainMenu() {
System.out.println("!Mahasiswa!");
System.out.println("1. Insert data");
System.out.println("2. View data");
System.out.println("3. Delete data");
System.out.println("4. Update data");
System.out.println("5. Exit");
System.out.print("Choose >> ");
}
public void viewData() {
for(int i = 0; i < this.nameVector.size(); ++i) {
System.out.printf("%d. %s - %s - %d \n", i + 1, this.nameVector.get(i),
this.emailVector.get(i), this.ageVector.get(i));
}
public Main() {
this.scan = new Scanner(System.in);
this.name = "";
this.email = "";
this.age = 0;
this.menu = 0;
do {
this.mainMenu();
this.menu = this.scan.nextInt();
this.scan.nextLine();
switch(this.menu) {
case 1:
do {
do {
System.out.print("Input student's name [5-10 Characters]: ");
this.name = this.scan.nextLine();
} while(this.name.length() < 5);
} while(this.name.length() > 10);
do {
System.out.print("Input student's email [Must be ended with
'@gmail.com']: ");
this.email = this.scan.nextLine();
} while(!this.email.endsWith("@gmail.com"));
do {
System.out.print("Input student's age [Must be greater than 15]:
");
try {
this.age = this.scan.nextInt();
this.scan.nextLine();
} catch (Exception var2) {
System.out.println("System Error ! Must be number !");
}
} while(this.age <= 14);
this.nameVector.add(this.name);
this.emailVector.add(this.email);
this.ageVector.add(this.age);
break;
case 2:
this.viewData();
break;
case 3:
this.delete();
break;
case 4:
this.update();
}
} while(this.menu != 5);
public static void main(String[] args) {
new Main();
}
}
