In this exercise, you will create a couple of helper methods for ArrayLists in a class called ArrayListMethods.

Create three static methods:

print- This method takes an ArrayList as a parameter, and simply prints each value of the ArrayList on a separate line in the console.
condense- This method takes an ArrayList as a parameter, and condenses the ArrayList into half the amount of values. While traversing, this method will take the existing value at the index and add the index following to the existing value. For example, if we had an ArrayList that consisted of Strings ["0", "1", "2", "3"], the ArrayListMethods. condense(["0", "1", "2", "3"]) would alter the ArrayList to be ["01", "23"].
duplicate- This method takes an ArrayList and duplicates the value of the index at the position index + 1. As a result, ArrayListMethods. duplicate(["01", "23"] would be ["01", "01", "23", "23"].
If done correctly, the methods should work in the ArrayListMethodsTester file.

[ArrayListMethodsTester. java]

import java. util. ArrayList;

public class ArrayListMethodsTester
{
public static void main(String[] args)
{
ArrayList stringArray = new ArrayList();
stringArray. add("This");
stringArray. add("is");
stringArray. add("an");
stringArray. add("ArrayList");
stringArray. add("of");
stringArray. add("Strings");

ArrayListMethods. print(stringArray);
System. out. println("\nArrayList is condensing:");
ArrayListMethods. condense(stringArray);
ArrayListMethods. print(stringArray);
System. out. println("\nArrayList is duplicating:");
ArrayListMethods. duplicate(stringArray);
ArrayListMethods. print(stringArray);

}
}

[ArrayListMethods. java]

import java. util. ArrayList;
public class ArrayListMethods
{

}

package lab1;

import java.util.ArrayList;

import java.util.Iterator;

public class ArrayListMethodsTester

{

public static void main(String[] args)

{

ArrayList<String> stringArray = new ArrayList<String>();

stringArray.add("This");

stringArray.add("is");

stringArray.add("an");

stringArray.add("ArrayList");

stringArray.add("of");

stringArray.add("Strings");

System.out.println("Printing the arraylist:");

ArrayListMethods.print(stringArray);

System.out.println("\nArrayList is condensing:");

ArrayListMethods.condense(stringArray);

ArrayListMethods.print(stringArray);

System.out.println("\nArrayList is duplicating:");

ArrayListMethods.duplicate(stringArray);

ArrayListMethods.print(stringArray);

}

}

class ArrayListMethods

{

static void print(ArrayList stringArray)

{

  Iterator it = stringArray.iterator();

  while (it.hasNext())

     System.out.println(it.next() + " ");

     

}

static void condense(ArrayList stringArray)

{

  int length=stringArray.size();

     

  ArrayList cloneArray=(ArrayList) stringArray.clone();

     

  stringArray.clear();

  StringBuilder sb=new StringBuilder("");

     

  for (int i = 0; i < (length/2); i++)

  {

      sb.append(cloneArray.get(i));

      sb.append(" ");    

  }

  stringArray.add(sb);

     

  StringBuilder sb1=new StringBuilder("");

  for (int i = (length/2); i < length; i++)

  {

      sb1.append(cloneArray.get(i));

      sb1.append(" ");    

  }

  stringArray.add(sb1);

  }

static void duplicate(ArrayList stringArray)

{

  for (int i = 0; i < stringArray.size(); i+=2)

  {

      stringArray.add(i+1,stringArray.get(i));

  }

}

}

Explanation:

Get the length of the arraylist  to copy the array into another arraylist .Empty the array so that new content can be stored in it .Use a loop to half of array_list.Use a loop from half of array_list to the end of arraylist and  append all into a single string.

Work with a monitor that’s calibrated and profiled. for critical image editing, calibration and profiling are essential. otherwise, the image you see on your monitor looks different on other monitors or when printed.plan to use adjustment layers to adjust the tonal range and color balance of your image. adjustment layers let you go back and make successive tonal adjustments without discarding or permanently modifying data from the image layer. keep in mind that using adjustment layers adds to the file size of the image and demands more ram from your computer. accessing the color and tonal commands in the adjustments panel automatically creates adjustment layers.if you don’t want to use adjustment layers, you can apply adjustments directly to an image layer. remember that some image information is discarded, when making a color or tonal adjustment directly to an image layer.for critical work and maximum preservation of image data, it’s best if the image you work with is 16 bits per channel (16‑bit image) rather than 8 bits per channel (8‑bit image). data is discarded when you make tonal and color adjustments. the loss of image information is more critical in an 8‑bit image than a 16‑bit image. generally, 16‑bit images have a larger file size than 8‑bit images.duplicate or make a copy of the image file. working on a copy of your image preserves the original in the event you want to use the image in its original state.remove any flaws such as dust spots, blemishes, and scratches from the image before making color and tonal adjustments.open the info or histogram panel in expanded view. as you evaluate and correct the image, both panels display invaluable feedback on your adjustments.you can make a selection or use a mask to confine your color and tonal adjustments to part of an image. another way to apply color and tonal adjustments selectively is to set up your document with image components on different layers. color and tonal adjustments are applied to only one layer at a time. only the image components on the targeted layer are affected.