two for one

**ZaneDarklace** · February 26th, 2014, 10:59 AM

Hello. I am working on this and it asks for me to print a series of names in ascending order then descending order. This is what the projects asks:
Call both your project and class AscendDescend. The first column should be in ascending order and the second in
descending order. The output should appear as below (Be sure to include the headers):
Ascend Descend
Agnes Thomas
Alfred Mary
Alvin Lee
Bernard Herman
Bill Ezra
Ezra Bill
Herman Bernard
Lee Alvin
Mary Alfred
Thomas Agnes

This is my code so far:

import java.util.*;
public class twoforone
{
  public static void main(String args[])
  {
    String theArray[] = {"Bill", "Mary", "Lee", "Agnes", "Alfred", "Thomas", "Alvin", "Bernard", "Ezra", "Herman"};
    for(int j = 0; j < theArray.length; j++)
    {
      Arrays.sort(theArray);
      System.out.println(theArray[j] + " ");
    }
    System.out.println(" ");
    {
      for(int m = 0; m < theArray.length; m++)
      {
        Arrays.sort(theArray);
      System.out.println(theArray[m] + " ");
      }
    }
  }
}

I cannot get it to print in descending order. Please send me feed back on this.

**GregBrannon** · February 26th, 2014, 12:34 PM

To create a for loop that begins at the end of an array and iterates it to the beginning, do something like:

for ( j = myArray.length - 1 ; j > -1 ; j-- )

**dicdic** · February 26th, 2014, 07:17 PM

Note
You used Arrays.sort(arg) method repeatedly since that statement is inside your loop

for(int j = 0; j < theArray.length; j++)
    {
      Arrays.sort(theArray);
      System.out.println(theArray[j] + " ");
    }

but actually you can do it once. Put the Arrays.sort(args) outside the loop, and you will
notice that the elements of that array was sorted after that statement. The reason
of that is because of being mutable of Array.

**ZaneDarklace** · February 27th, 2014, 11:38 AM

the m array is actually the descending array. i just couldnt figure out how to make it descending.

--- Update ---

i have it to where it descends in order but i have yet to make it to where the arrays are side by side.

import java.util.*;
public class twoforone
{
  public static void main(String args[])
  {
    String theArray[] = {"Bill", "Mary", "Lee", "Agnes", "Alfred", "Thomas", "Alvin", "Bernard", "Ezra", "Herman"};
    System.out.println("Ascending");
    System.out.println(" ");
    for(int j = 0; j < theArray.length; j++)
    { 
      Arrays.sort(theArray);
      System.out.println(theArray[j]);
    }
    System.out.println(" ");
    System.out.println("Descending");
    System.out.println(" ");
    for (int m = theArray.length - 1 ; m > -1 ; m--)
    {
      System.out.println(theArray[m]);
    }
 
  }
}

It prints this:

Ascending
 
Agnes
Alfred
Alvin
Bernard
Bill
Ezra
Herman
Lee
Mary
Thomas
 
Descending
 
Thomas
Mary
Lee
Herman
Ezra
Bill
Bernard
Alvin
Alfred
Agnes

can someone help me code it to where the arrays are side by side?

**GregBrannon** · February 27th, 2014, 12:26 PM

Be creative. You only need one array sorted in order. In one column you print the array in ascending order, in the second column you print the array in descending order. One loop can provide an index delta. In the first column, the index delta is from the beginning. In the second column, the index delta is from the end.

Thread: two for one

LinkBack

Thread Tools

Display

two for one

Re: two for one

Re: two for one

Re: two for one

Re: two for one

Tags for this Thread