Revision: 61876
Updated Code
at January 21, 2013 23:55 by eiger824
Updated Code
package com.santi;
import java.io.BufferedReader;
import java.io.InputStreamReader;
import java.util.ArrayList;
import java.util.Date;
public class Main {
public static void main(String[] args) {
//declaration of arraylist-type variables
ArrayList<String> names=new ArrayList<String>();
ArrayList<String> last_names=new ArrayList<String>();
ArrayList<String> phones=new ArrayList<String>();
ArrayList<String> emails=new ArrayList<String>();
//declaration of a Date-type variable
Date date1 = new Date();
//rest of auxiliary variables
int cont=0;
boolean a =true;
//end of variable declarations
System.out.println("Program started on " + date1);
//main while loop
while (a==true){
if(names.size()==0 && last_names.size()==0 && phones.size()==0 && emails.size()==0) System.out.flush();
System.out.println("Please select an option: ");
String option2 = getInput("1. Add contact." +
"2. Show contacts." +
"3. Remove contact. 0. Exit program. : ");
int opt=Integer.parseInt(option2);
switch (opt) {
case 1:
names.add(getInput("Name: "));
last_names.add(getInput("Last name: "));
phones.add(getInput("Phone number: "));
emails.add(getInput("Email: "));
break;
case 2:
if (names.isEmpty() && last_names.isEmpty() && phones.isEmpty() && emails.isEmpty()) {
System.out.println("There are no contacts yet!");
}
else {
for (int i = 0; i < names.size(); i++) {
System.out.println(i+1 + "- ");
String aux_name = names.get(i);
System.out.println(aux_name);
String aux_last_name = last_names.get(i);
System.out.println(aux_last_name);
String aux_phone = phones.get(i);
System.out.println(aux_phone);
String aux_email = emails.get(i);
System.out.println(aux_email);
}
}
break;
case 3:
if (names.isEmpty() && last_names.isEmpty() && phones.isEmpty() && emails.isEmpty()) {
System.out.println("There are no contacts yet!");
}
else if(names.size()==1){
names.clear();
last_names.clear();
phones.clear();
emails.clear();
System.out.println("All contacts succesfully erased! No contacts in database anymore.");
break;
}
else {
cont=0;
String option=getInput("1.REMOVE BY NAME. 2.REMOVE ALL. : ");
int option3 = Integer.parseInt(option);
switch (option3){
case 1:
String chc = getInput("Please enter the name of the contact you wish to erase: ");
for (String name : names) {
if (chc.equals(name)) {
//remove all fields of data in that position
names.remove(chc);
last_names.remove(chc);
phones.remove(chc);
emails.remove(chc);
System.out.println("Contact succesfully erased!");
break;
}cont++;
}
if (cont==names.size()) {
System.out.println("WARNING: No matches between provided name and stored names. Remember: this program is case-sensitive!");
}
break;
case 2:
names.clear();
last_names.clear();
phones.clear();
emails.clear();
System.out.println("All contacts succesfully erased! No contacts in database anymore.");
break;
}
break;
}
break;
case 0:
Date date2 = new Date();
System.out.println("Program ended on " + date2);
System.out.println("Developed by Santi Pagola.");
a=false;
break;
}
}
}
private static String getInput(String prompt) {
BufferedReader stdin = new BufferedReader(
new InputStreamReader(System.in));
System.out.print(prompt);
System.out.flush();
try {
return stdin.readLine();
} catch (Exception e) {
return "Error: " + e.getMessage();
}
}
}
Revision: 61875
Updated Code
at January 21, 2013 23:14 by eiger824
Updated Code
package com.santi;
import java.io.BufferedReader;
import java.io.InputStreamReader;
import java.util.ArrayList;
import java.util.Date;
public class Main {
public static void main(String[] args) {
//declaration of arraylist-type variables
ArrayList<String> names=new ArrayList<String>();
ArrayList<String> last_names=new ArrayList<String>();
ArrayList<String> phones=new ArrayList<String>();
ArrayList<String> emails=new ArrayList<String>();
//declaration of a Date-type variable
Date date1 = new Date();
//rest of auxiliary variables
int cont=1;
boolean a =true;
//end of variable declarations
System.out.println("Program started on " + date1);
//main while loop
while (a==true){
if(names.size()==0 && last_names.size()==0 && phones.size()==0 && emails.size()==0) System.out.flush();
System.out.println("Please select an option: ");
String option2 = getInput("1. Add contact." +
"2. Show contacts." +
"3. Remove contact. 0. Exit program. : ");
int opt=Integer.parseInt(option2);
switch (opt) {
case 1:
names.add(getInput("Name: "));
last_names.add(getInput("Last name: "));
phones.add(getInput("Phone number: "));
emails.add(getInput("Email: "));
break;
case 2:
if (names.isEmpty() && last_names.isEmpty() && phones.isEmpty() && emails.isEmpty()) {
System.out.println("There are no contacts yet!");
}
else {
for (int i = 0; i < names.size(); i++) {
System.out.println(i+1 + "- ");
String aux_name = names.get(i);
System.out.println(aux_name);
String aux_last_name = last_names.get(i);
System.out.println(aux_last_name);
String aux_phone = phones.get(i);
System.out.println(aux_phone);
String aux_email = emails.get(i);
System.out.println(aux_email);
}
}
break;
case 3:
if (names.isEmpty() && last_names.isEmpty() && phones.isEmpty() && emails.isEmpty()) {
System.out.println("There are no contacts yet!");
}
else {
String option=getInput("1.REMOVE BY NAME. 2.REMOVE ALL. : ");
int option3 = Integer.parseInt(option);
switch (option3){
case 1:
String chc = getInput("Please enter the name of the contact you wish to erase: ");
for (String name : names) {
if (chc.equals(name)) {
//remove all fields of data in that position
names.remove(chc);
last_names.remove(chc);
phones.remove(chc);
emails.remove(chc);
System.out.println("Contact succesfully erased!");
break;
}cont++;
}
if (cont==names.size()+1) {
System.out.println("WARNING: No matches between provided name and stored names. Remember: this program is case-sensitive!");
}
break;
case 2:
names.clear();
last_names.clear();
phones.clear();
emails.clear();
System.out.println("All contacts succesfully erased! No contacts in database anymore.");
break;
}
}
break;
case 0:
Date date2 = new Date();
System.out.println("Program ended on " + date2);
System.out.println("Developed by Santi Pagola.");
a=false;
break;
}
}
}
private static String getInput(String prompt) {
BufferedReader stdin = new BufferedReader(
new InputStreamReader(System.in));
System.out.print(prompt);
System.out.flush();
try {
return stdin.readLine();
} catch (Exception e) {
return "Error: " + e.getMessage();
}
}
}
Revision: 61874
Initial Code
Initial URL
Initial Description
Initial Title
Initial Tags
Initial Language
at January 21, 2013 21:23 by eiger824
Initial Code
package com.santi;
import java.io.BufferedReader;
import java.io.InputStreamReader;
import java.util.ArrayList;
import java.util.Date;
public class Main {
public static void main(String[] args) {
//declaration of arraylist-type variables
ArrayList<String> names=new ArrayList<String>();
ArrayList<String> last_names=new ArrayList<String>();
ArrayList<String> phones=new ArrayList<String>();
ArrayList<String> emails=new ArrayList<String>();
//declaration of a Date-type variable
Date date1 = new Date();
//rest of auxiliary variables
int num = 0;
boolean a =true;
System.out.println("Program started on " + date1);
//main while loop
while (a==true){
System.out.println("Please select an option: ");
String option2 = getInput("1. Add contact." +
"2. Show contacts." +
"3. Remove contact. 0. Exit program. : ");
int opt=Integer.parseInt(option2);
switch (opt) {
case 1:
names.add(getInput("Name: "));
last_names.add(getInput("Last name: "));
phones.add(getInput("Phone number: "));
emails.add(getInput("Email: "));
break;
case 2:
if (names.isEmpty() && last_names.isEmpty() && phones.isEmpty() && emails.isEmpty()) {
System.out.println("There are no contacts yet!");
}
else {
for (int i = 0; i < names.size(); i++) {
System.out.println(i+1 + "- ");
String aux_name = names.get(i);
System.out.println(aux_name);
String aux_last_name = last_names.get(i);
System.out.println(aux_last_name);
String aux_phone = phones.get(i);
System.out.println(aux_phone);
String aux_email = emails.get(i);
System.out.println(aux_email);
}
}
break;
case 3:
if (names.isEmpty() && last_names.isEmpty() && phones.isEmpty() && emails.isEmpty()) {
System.out.println("There are no contacts yet!");
}
else {
String chc = getInput("Please enter the name of the contact you wish to erase: ");
for (String name : names) {
if (chc.equals(name)) {
int pos = names.indexOf(chc);
//remove all fields of data in that position
names.remove(pos);
last_names.remove(pos);
phones.remove(pos);
emails.remove(pos);
break;
}
else{ System.out.println("No matches between provided name and stored names. This program is case-sensitive!");break;}
}
}
break;
case 0:
Date date2 = new Date();
System.out.println("Program ended on " + date2);
System.out.println("Developed by Santi Pagola.");
a=false;
break;
// return;
}
}
}
private static String getInput(String prompt) {
BufferedReader stdin = new BufferedReader(
new InputStreamReader(System.in));
System.out.print(prompt);
System.out.flush();
try {
return stdin.readLine();
} catch (Exception e) {
return "Error: " + e.getMessage();
}
}
}
Initial URL
http://programmingeiger824.blogspot.com
Initial Description
A basic database made in Java. It resembles a mobile phone contacts activity in which user is prompted to introduce some data of new contacts.
Initial Title
Basic Database in Java. Updated Version
Initial Tags
database, java
Initial Language
Java