I wrote this program a few months back when I wan learning JAVA.I haven't learned java yet though because its to vast.
The program is console based. It uses the util package of java in a great way. It keeps record in a flat file. You should create a Data file called phone.dat in same folder where phone.java is kept.
So here is the code:-(phone.java)
CODE
import java .io .*;
import java .util .*;
import java.awt.event.*;
public class phone
{
public void new_record()
{
String id,name,city,add,number,total,list;
boolean bln=false;
try
{
Properties pr=new Properties();
FileInputStream fin=new FileInputStream("phone.dat");
if(fin!=null)
{
pr.load(fin);
}
BufferedReader br1=new BufferedReader (new InputStreamReader(System.in));
FileOutputStream fout=new FileOutputStream("phone.dat");
for(;;)
{
System.out .println("Enter the 'ID', 'q' for quit:");
id=br1.readLine().toUpperCase();
bln=pr.containsKey(id);
System.out .println("FLag"+bln);
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 id="";
String total="";
int x=1;
try
{
FileInputStream fin=new FileInputStream("phone.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(1500);
}
catch(Exception e){}
}
System.out.println("");
System.out.println("");
}
fin.close();
}
catch(Exception e){}
}
public void display_by_name()
{
String name="",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("phone.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("phone.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 name="",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("phone.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("phone.dat");
if(fin!=null)
{
pr.load(fin);
}
BufferedReader br1=new BufferedReader (new InputStreamReader(System.in));
FileOutputStream fout=new FileOutputStream("phone.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 id="";
boolean bln=false;
try
{
Properties pr1=new Properties();
FileInputStream fin=new FileInputStream("phone.dat");
if(fin!=null)
pr1.load(fin);
BufferedReader br1=new BufferedReader (new InputStreamReader(System.in));
FileOutputStream fout=new FileOutputStream("phone.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(1500);
}
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);
}
public static void main (String[] args)
{
phone cl=new phone();
BufferedReader br;
for(;;)
{
try
{
cl.menu();
br=new BufferedReader (new InputStreamReader(System.in));
System.out.print(" &
