It Is a Simple Java Phone Book Application Created Using Eclipse IDE. In this the data are stored in the File System in the form of Objects. Below are the Steps to create and run the Application
Step 1 : Create a New Java Procject Named phoneBookApp in Eclipse. and then Create a new class phoneBook(java file) Click Finish
Step2 : Create a file store.dat in D:/data/workspace/phoneBook/ Path Copy and Paste the below Prog in the “phoneBook. java” File
import java .io .*;
import java .util .*;
public class phoneBook
{
public static void main (String[] args)
{
phoneBook cl=new phoneBook();
BufferedReader br;
String ch=”";
try
{
System.out.println(“Phone Book Application Using JAVA prog”);
do
{
cl.menu();
br=new BufferedReader (new InputStreamReader(System.in));
System.out.print(“Enter your option :”);
ch=br.readLine();
if (ch.equals(“1″))
cl.new_record();
if (ch.equals(“2″))
cl.display_record();
if (ch.equals(“3″))
cl.display_by_name();
if (ch.equals(“4″))
cl.display_by_city();
if (ch.equals(“5″))
cl.display_record_first_letter();
if (ch.equals(“6″))
cl.replace_record();
if (ch.equals(“7″))
cl.delete_record();
if (ch.equals(“8″))
System.out.println(“Thanks”);
} while(!ch.equals(“8″));
}
catch(Exception E){}
}
public void new_record()
{
String id,name,city,add,number,total;
boolean bln=false;
try
{
Properties pr=new Properties();
FileInputStream fin=new FileInputStream(“D:/data/workspace/phoneBook/store.dat”);
if(fin!=null)
{
pr.load(fin);
}
BufferedReader br1=new BufferedReader (new InputStreamReader(System.in));
FileOutputStream fout=new FileOutputStream(“store.dat”);
for(;;)
{
System.out .println(“Enter the ‘ID’, ‘q’ for quit:”);
id=br1.readLine().toUpperCase();
bln=pr.containsKey(id);
if(bln)
{
System.out.println(“ID id already exists, Please Enter another ID:”);
continue;
}
if((id.toUpperCase()).equals(“Q”))
break;
System.out.println(“Enter name:”);
name=br1.readLine().toUpperCase();
System.out.println(“Enter Phone number:”);
number=br1.readLine().toUpperCase();
System.out.println(“Enter address:”);
add=br1.readLine().toUpperCase();
System.out.println(“Enter city:”);
city=br1.readLine().toUpperCase();
total=” Name=”+name+”,”+”Phone no=”+number+”,”+” Address=”+add+”,”+” City=”+city;
total=total.toUpperCase();
pr.put(id,total);
pr.store(fout,”My Telephone Book”);
}
fout.close();
}
catch(Exception e)
{
System.out.println(e);
}
}
public void display_record()
{
String;
String total=”";
int x=1;
try
{
FileInputStream fin=new FileInputStream(“store.dat”);
Properties pr1=new Properties();
pr1.load(fin);
Enumeration enum1=pr1.keys();
while(enum1.hasMoreElements())
{
id=enum1.nextElement().toString();
total=pr1.get(id).toString();
StringTokenizer stk=new StringTokenizer(total,”=,”);
System.out .println(“RECORD ::”+x+”\n”);
x++;
while(stk.hasMoreTokens())
{
String key=stk.nextToken();
String value=stk.nextToken();
System.out.println(“\t”+key+”::\t\t::”+value);
try
{
Thread.sleep(1000);
}
catch(Exception e){}
}
System.out.println(“”);
System.out.println(“”);
}
fin.close();
}
catch(Exception e){}
}
public void display_by_name()
{
String,id,total;
String key[]=new String[4];
String value[]=new String[4];
int i=0;
System.out.println(“Enter Name For Searching Record :-”);
try
{
BufferedReader br=new BufferedReader(new InputStreamReader(System.in));
name=br.readLine().toUpperCase();
FileInputStream fin=new FileInputStream(“store.dat”);
Properties pr1=new Properties();
pr1.load(fin);
Enumeration enum1=pr1.keys();
while(enum1.hasMoreElements())
{
id=enum1.nextElement().toString();
total=pr1.get(id).toString();
StringTokenizer stk=new StringTokenizer(total,”=,”);
while(stk.hasMoreTokens())
{
for(i=0;i<4;i++)
{
key[i]=stk.nextToken();
value[i]=stk.nextToken();
}
if(value[0].equals(name))
{
for(i=0;i<4;i++)
{
System.out.println(“\t”+key[i]+”:”+value[i]);
try
{
Thread.sleep(1500);
}
catch(Exception e){}
}
}
}
System.out.println(“”);
}
fin.close();
}
catch(Exception e){
System.out.println(e);
}
}
public void display_by_city()
{
String city=”",id,total;
String key2[]=new String[4];
String value2[]=new String[4];
int i=0;
System.out.println(“Enter City For Searching Record :-”);
try
{
BufferedReader br=new BufferedReader(new InputStreamReader(System.in));
city=br.readLine().toUpperCase();
FileInputStream fin=new FileInputStream(“store.dat”);
Properties pr1=new Properties();
pr1.load(fin);
Enumeration enum1=pr1.keys();
while(enum1.hasMoreElements())
{
id=enum1.nextElement().toString();
total=pr1.get(id).toString();
StringTokenizer stk=new StringTokenizer(total,”=,”);
while(stk.hasMoreTokens())
{
key2[i]=stk.nextToken();
value2[i]=stk.nextToken();
// System.out.println(“aaaaaaaaaaaaaaa”+value2[i]);
if(i==3)
{
if(value2[i].equals(city))
{
for(int j=0;j<4;j++)
{
System.out.println(“\t”+key2[j]+”:\t”+value2[j]);
try
{
Thread.sleep(1500);
}
catch(Exception e){}
}
}
}
i++;
if(i>3)
i=0;
}
System.out.println(“”);
System.out.println(“”);
}
fin.close();
}
catch(Exception e){
System.out.println(e);
}
}
public void display_record_first_letter()
{
String,id,total,str=”";
String key2[]=new String[4];
String[] value2=new String[4];
int i=0;
try
{
BufferedReader br=new BufferedReader(new InputStreamReader(System.in));
System.out.println(“ Enter The First Letter Of any Name:”);
name=br.readLine();
name=name.substring(0,1).toUpperCase();
FileInputStream fin=new FileInputStream(“store.dat”);
Properties pr1=new Properties();
pr1.load(fin);
Enumeration enum1=pr1.keys();
while(enum1.hasMoreElements())
{
id=enum1.nextElement().toString();
total=pr1.get(id).toString();
StringTokenizer stk=new StringTokenizer(total,”=,”);
while(stk.hasMoreTokens())
{
for(i=0;i<4;i++)
{
key2[i]=stk.nextToken();
value2[i]=stk.nextToken();
}
str=value2[0].substring(0,1);
if(str.equals(name))
{
for(i=0;i<4;i++)
{
System.out.println(“\t”+key2[i]+”:\t”+value2[i]);
try
{
Thread.sleep(1500);
}
catch(Exception e){}
}
}
}
System.out.println(“”);
System.out.println(“”);
}
fin.close();
}
catch(Exception e){
System.out.println(e);
}
}
public void replace_record()
{
String id,name,city,add,number,total,list;
boolean bln=false;
try
{
Properties pr=new Properties();
FileInputStream fin=new FileInputStream(“store.dat”);
if(fin!=null)
{
pr.load(fin);
}
BufferedReader br1=new BufferedReader (new InputStreamReader(System.in));
FileOutputStream fout=new FileOutputStream(“store.dat”);
for(;;)
{
System.out .println(“Enter the ‘ID’, ‘q’ for quit:”);
id=br1.readLine().toUpperCase();
if((id.toUpperCase()).equals(“Q”))
break;
bln=pr.containsKey(id);
if(bln)
{
System.out.println(“ID id already exists, “);
System.out.println(“enter name:”);
name=br1.readLine().toUpperCase();
System.out.println(“enter Phone number:”);
number=br1.readLine().toUpperCase();
System.out.println(“enter address:”);
add=br1.readLine().toUpperCase();
System.out.println(“enter city:”);
city=br1.readLine().toUpperCase();
total=” Name=”+name+”,”+”Phone no=”+number+”,”+” Address=”+add+”,”+” City=”+city;
total=total.toUpperCase();
pr.put(id,total);
pr.store(fout,”My Telephone Book”);
}
else
{
System.out.println(“ID does’nt Exists, Please Enter A Valid ID:”);
continue;
}
}
pr.store(fout,”My Phone Book”);
fout.close();
}
catch(Exception e)
{
System.out.println(e);
}
}
public void delete_record()
{
String;
boolean bln=false;
try
{
Properties pr1=new Properties();
FileInputStream fin=new FileInputStream(“store.dat”);
if(fin!=null)
pr1.load(fin);
BufferedReader br1=new BufferedReader (new InputStreamReader(System.in));
FileOutputStream fout=new FileOutputStream(“store.dat”);
for(;;)
{
System.out .println(“Enter the ‘ID’, ‘q’ for quit:”);
id=br1.readLine().toUpperCase();
if((id.toUpperCase()).equals(“Q”))
break;
bln=pr1.containsKey(id);
if(bln)
{
System.out.println(“ID exists :”);
String str=pr1.remove(id).toString();
pr1.store(fout,”My Phone Book”);
try
{
Thread.sleep(1000);
}
catch(Exception e){}
System.out.println(“Record deleted successfully”);
}
else
{
System.out.println(“Enter Existing ID:”);
pr1.store(fout,”My Phone Book”);
}
}
pr1.store(fout,”My Phone Book”);
fin.close();
fout.close();
}
catch(Exception e)
{
System.out.println(e);
}
}
public void menu()
{
char ch=30;
char ch1=31;
int l;
for(int i=0;i<27;i++)
{
System.out.print(” “);
}
for(l=0;l<2;l++)
{
for(int j=0;j<38;j++)
{
System.out.print(ch);
}
System.out.println(“”);
for(int k=0;k<27;k++)
{
System.out.print(” “);
}
}
System.out.print(ch);
System.out.print(ch1);
for(int i=0;i<34;i++)
System.out.print(” “);
System.out.print(ch);
System.out.print(ch1);
System.out.println(“”);
for(int i=0;i<27;i++)
System.out.print(” “);
System.out.print(ch);
System.out.print(ch1+” “);
System.out.print (” 1. Enter new Record: “);
System.out.print(” “+ch);
System.out.println(ch1+” “);
for(int i=0;i<26;i++)
System.out.print(” “);
System.out.print(” “+ch1);
System.out.print(ch+” “);
System.out.print (” 2. Display All Record: “);
System.out.print(” “+ch);
System.out.println(ch1+” “);
for(int i=0;i<26;i++)
System.out.print(” “);
System.out.print(” “+ch);
System.out.print(ch1+” “);
System.out.print (” 3. Search Record by name: “);
System.out.print(” “+ch);
System.out.println(ch1+” “);
for(int i=0;i<26;i++)
System.out.print(” “);
System.out.print(” “+ch);
System.out.print(ch1+” “);
System.out.print (” 4. Search Record by city: “);
System.out.print(” “+ch);
System.out.println(ch1+” “);
for(int i=0;i<26;i++)
System.out.print(” “);
System.out.print(” “+ch);
System.out.print(ch1+” “);
System.out.print (” 5. Search Record by 1st letter:”);
System.out.print(” “+ch);
System.out.println(ch1+” “);
for(int i=0;i<26;i++)
System.out.print(” “);
System.out.print(” “+ch);
System.out.print(ch1+” “);
System.out .print(” 6. Replace Record: “);
System.out.print(” “+ch);
System.out.println(ch1+” “);
for(int i=0;i<26;i++)
System.out.print(” “);
System.out.print(” “+ch);
System.out.print(ch1+” “);
System.out .print(” 7. Delete Record: “);
System.out.print(” “+ch);
System.out.println(ch1+” “);
for(int i=0;i<26;i++)
System.out.print(” “);
System.out.print(” “+ch);
System.out.print(ch1+” “);
System.out .print(” 8. Exit: ”);
System.out.print(” “+ch);
System.out.println(ch1+” “);
for(int j=0;j<27;j++)
System.out.print(” “);
System.out.print(ch);
System.out.print(ch1);
for(int i=0;i<34;i++)
System.out.print(” “);
System.out.print(ch);
System.out.print(ch1);
System.out.println(“”);
for(int i=0;i<27;i++)
System.out.print(” “);
for(int i=0;i<38;i++)
System.out.print(ch);
System.out.println(“”);
for(int i=0;i<27;i++)
System.out.print(” “);
for(int i=0;i<38;i++)
System.out.print(ch);
}
}
OUTPUT :
Phone Book Application Using JAVA prog
1. Enter new Record:
2. Display All Record:
3. Search Record by name:
4. Search Record by city:
5. Search Record by 1st letter:
6. Replace Record:
7. Delete Record:
8. Exit:
Enter your option :1
Enter the ‘ID’, ‘q’ for quit:
123
enter name:
gopu
enter Phone number:
12345
enter address:
abc
enter city:
chennai
Enter the ‘ID’, ‘q’ for quit:
q
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