Here is a simple Java program that uses an array to store Names and Addresses:
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class NamesAndAddresses{
public static void main(String args[])
{
// a 2-D string array with four rows and four colomns.
String[][] Names = new String[][]
{{"suchita"," 1234 Austin TX", "suchita@yahoo.com","512 567 8904"},
{ "Maria","345 Houston TX", "maria@gmail.com", "456 890 2345"},
{"Ben","789 Boston MA", "ben@tt.com","345 456 7890"},
{"John","890 San Francisco CA","john@pinterest.com", "234 789 2415"}};
// A for loop for printing the elements in order
System.out.println("\nPHONE BOOK: \n");
for (int i=0;i <(Names.length);i++)
System.out.println(" Name: " + Names[i][0] + " Address: " + Names[i][1]+
" email: " + Names[i][2] + " phone: " + Names[i][3]);
}
}
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Let's look at this one statement at a time:
The String array "Names" has 4 rows and 4 colomns.
Each row corresponds to one entry.
---------------------------------------------------------------------------------------------
String[][] Names = new String[][]
{{"suchita"," 1234 Austin TX", "suchita@yahoo.com","512 567 8904"},
{ "Maria","345 Houston TX", "maria@gmail.com", "456 890 2345"},
{"Ben","789 Boston MA", "ben@tt.com","345 456 7890"},
{"John","890 San Francisco CA","john@pinterest.com", "234 789 2415"}};
----------------------------------------------------------------------------------------------------
Here is a "for loop" that I use for printing the array.
--------------------------------------------------------------------------------------------------
System.out.println("\nPHONE BOOK: \n");
for (int i=0;i <(Names.length);i++)
System.out.println(" Name: " + Names[i][0] + " Address: " + Names[i][1]+
" email: " + Names[i][2] + " phone: " + Names[i][3]);
--------------------------------------------------------------------------------------------------
When I compile and run the program, the resulting output on my console is:
---------------------------------------------------------------------------------------------------
PHONE BOOK:
Name: suchita Address: 1234 Dallas TX email: suchita@yahoo.com phone: 512 567 8904
Name: Maria Address: 345 Houston TX email: maria@gmail.com phone: 456 890 2345
Name: Ben Address: 789 Boston MA email: ben@tt.com phone: 345 456 7890
Name: John Address: 890 San Francisco CA email: john@pinterest.com phone: 234 789 2415
--------------------------------------------------------------------------------------------------
Here is a "for loop" for printing the array in reverse:
---------------------------------------------------------------------------------------------------
System.out.println("\nPHONE BOOK IN REVERSE: \n");
for (int i=Names.length-1 ;i >=0 ;i--)
System.out.println(" Name: " + Names[i][0] + " Address: " + Names[i][1]+
" email: " + Names[i][2] + " phone: " + Names[i][3]);
----------------------------------------------------------------------------------------------------
When I compile and run the program, the resulting output on my console is:
-----------------------------------------------------------------------------------------------------
PHONE BOOK IN REVERSE:
Name: John Address: 890 San Francisco CA email: john@pinterest.com phone: 234 789 2415
Name: Ben Address: 789 Boston MA email: ben@tt.com phone: 345 456 7890
Name: Maria Address: 345 Houston TX email: maria@gmail.com phone: 456 890 2345
Name: suchita Address: 1234 Dallas TX email: suchita@yahoo.com phone: 512 567 8904
------------------------------------------------------------------------------------------------------
Here is the program with a nested for loop for printing out the array:
------------------------------------------------------------------------------------------------------
class MultiDArray{
public static void main(String args[])
{
// a 2-D string array with four rows and four colomns.
String myArray[][] = new String[][]
{{"suchita"," 1234 Austin TX", "suchita@yahoo.com","512 567 8904"},
{ "Maria","345 Houston TX", "maria@gmail.com", "456 890 2345"},
{"Ben","789 Boston MA", "ben@tt.com","345 456 7890"},
{"John","890 San Francisco CA","john@pinterest.com", "234 789 2415"}};
String display[] = new String[]{" Name: ", " Address: ", " Email:", " Phone :"};
// A for loop for printing out the elements in order
System.out.println("\nPHONE BOOK: \n");
for (int i=0;i < (myArray.length);i++)
{
for (int j=0; j< myArray[i].length; j++){
System.out.println(display[j] + myArray[i][j]);
}
System.out.println();
}
}
}
------------------------------------------------------------------------------------------------------
Here is a phone book array that is created and then the entries filled in at
the console by the user.
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import java.util.Scanner;
class NamesAndAddresses{
public static void main(String args[])
{
Scanner scan = new Scanner( System.in );
String[][] UserInput = new String[4][4];
for (int i=0;i < (UserInput.length);i++)
{
System.out.println(" Enter Name: ");
UserInput[i][0]=scan.nextLine();
System.out.println(" Enter Street Address: ");
UserInput[i][1]=scan.nextLine();
System.out.println(" Enter email address: ");
UserInput[i][2]=scan.nextLine();
System.out.println(" Enter phone number: ");
UserInput[i][3]=scan.nextLine();
}
// A for loop for printing the elements in order
System.out.println("\nPHONE BOOK: \n");
for (int i=0;i < (UserInput.length);i++)
System.out.println(" Name: " + UserInput[i][0] +
" Address: " + UserInput[i][1]+
" email: " + UserInput[i][2] +
" phone: " + UserInput[i][3]);
// A for loop for printing the elements in reverse order
System.out.println("\nPHONE BOOK IN REVERSE: \n");
for (int i=UserInput.length-1 ;i >=0 ;i--)
System.out.println(" Name: " + UserInput[i][0] +
" Address: " + UserInput[i][1]+
" email: " + UserInput[i][2] +
" phone: " + UserInput[i][3]);
}
}
---------------------------------------------------------------------------------------------
----------------------------------------------------------------------------------------------------
class NamesAndAddresses{
public static void main(String args[])
{
// a 2-D string array with four rows and four colomns.
String[][] Names = new String[][]
{{"suchita"," 1234 Austin TX", "suchita@yahoo.com","512 567 8904"},
{ "Maria","345 Houston TX", "maria@gmail.com", "456 890 2345"},
{"Ben","789 Boston MA", "ben@tt.com","345 456 7890"},
{"John","890 San Francisco CA","john@pinterest.com", "234 789 2415"}};
// A for loop for printing the elements in order
System.out.println("\nPHONE BOOK: \n");
for (int i=0;i <(Names.length);i++)
System.out.println(" Name: " + Names[i][0] + " Address: " + Names[i][1]+
" email: " + Names[i][2] + " phone: " + Names[i][3]);
}
}
-----------------------------------------------------------------------------------------------
Let's look at this one statement at a time:
The String array "Names" has 4 rows and 4 colomns.
Each row corresponds to one entry.
---------------------------------------------------------------------------------------------
String[][] Names = new String[][]
{{"suchita"," 1234 Austin TX", "suchita@yahoo.com","512 567 8904"},
{ "Maria","345 Houston TX", "maria@gmail.com", "456 890 2345"},
{"Ben","789 Boston MA", "ben@tt.com","345 456 7890"},
{"John","890 San Francisco CA","john@pinterest.com", "234 789 2415"}};
----------------------------------------------------------------------------------------------------
Here is a "for loop" that I use for printing the array.
--------------------------------------------------------------------------------------------------
System.out.println("\nPHONE BOOK: \n");
for (int i=0;i <(Names.length);i++)
System.out.println(" Name: " + Names[i][0] + " Address: " + Names[i][1]+
" email: " + Names[i][2] + " phone: " + Names[i][3]);
--------------------------------------------------------------------------------------------------
When I compile and run the program, the resulting output on my console is:
---------------------------------------------------------------------------------------------------
PHONE BOOK:
Name: suchita Address: 1234 Dallas TX email: suchita@yahoo.com phone: 512 567 8904
Name: Maria Address: 345 Houston TX email: maria@gmail.com phone: 456 890 2345
Name: Ben Address: 789 Boston MA email: ben@tt.com phone: 345 456 7890
Name: John Address: 890 San Francisco CA email: john@pinterest.com phone: 234 789 2415
--------------------------------------------------------------------------------------------------
Here is a "for loop" for printing the array in reverse:
---------------------------------------------------------------------------------------------------
System.out.println("\nPHONE BOOK IN REVERSE: \n");
for (int i=Names.length-1 ;i >=0 ;i--)
System.out.println(" Name: " + Names[i][0] + " Address: " + Names[i][1]+
" email: " + Names[i][2] + " phone: " + Names[i][3]);
----------------------------------------------------------------------------------------------------
When I compile and run the program, the resulting output on my console is:
-----------------------------------------------------------------------------------------------------
PHONE BOOK IN REVERSE:
Name: John Address: 890 San Francisco CA email: john@pinterest.com phone: 234 789 2415
Name: Ben Address: 789 Boston MA email: ben@tt.com phone: 345 456 7890
Name: Maria Address: 345 Houston TX email: maria@gmail.com phone: 456 890 2345
Name: suchita Address: 1234 Dallas TX email: suchita@yahoo.com phone: 512 567 8904
------------------------------------------------------------------------------------------------------
Here is the program with a nested for loop for printing out the array:
------------------------------------------------------------------------------------------------------
class MultiDArray{
public static void main(String args[])
{
// a 2-D string array with four rows and four colomns.
String myArray[][] = new String[][]
{{"suchita"," 1234 Austin TX", "suchita@yahoo.com","512 567 8904"},
{ "Maria","345 Houston TX", "maria@gmail.com", "456 890 2345"},
{"Ben","789 Boston MA", "ben@tt.com","345 456 7890"},
{"John","890 San Francisco CA","john@pinterest.com", "234 789 2415"}};
String display[] = new String[]{" Name: ", " Address: ", " Email:", " Phone :"};
// A for loop for printing out the elements in order
System.out.println("\nPHONE BOOK: \n");
for (int i=0;i < (myArray.length);i++)
{
for (int j=0; j< myArray[i].length; j++){
System.out.println(display[j] + myArray[i][j]);
}
System.out.println();
}
}
}
------------------------------------------------------------------------------------------------------
Here is a phone book array that is created and then the entries filled in at
the console by the user.
------------------------------------------------------------------------------------------------------
import java.util.Scanner;
class NamesAndAddresses{
public static void main(String args[])
{
Scanner scan = new Scanner( System.in );
String[][] UserInput = new String[4][4];
for (int i=0;i < (UserInput.length);i++)
{
System.out.println(" Enter Name: ");
UserInput[i][0]=scan.nextLine();
System.out.println(" Enter Street Address: ");
UserInput[i][1]=scan.nextLine();
System.out.println(" Enter email address: ");
UserInput[i][2]=scan.nextLine();
System.out.println(" Enter phone number: ");
UserInput[i][3]=scan.nextLine();
}
// A for loop for printing the elements in order
System.out.println("\nPHONE BOOK: \n");
for (int i=0;i < (UserInput.length);i++)
System.out.println(" Name: " + UserInput[i][0] +
" Address: " + UserInput[i][1]+
" email: " + UserInput[i][2] +
" phone: " + UserInput[i][3]);
// A for loop for printing the elements in reverse order
System.out.println("\nPHONE BOOK IN REVERSE: \n");
for (int i=UserInput.length-1 ;i >=0 ;i--)
System.out.println(" Name: " + UserInput[i][0] +
" Address: " + UserInput[i][1]+
" email: " + UserInput[i][2] +
" phone: " + UserInput[i][3]);
}
}
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