Java

I have this problem where I solved it  when my array is not empty.
My issue is whem the array is empty.  I tried to put an condition but it's useless.
I got this error "[ERROR]   CycleSwapTest.testCycleSwapEmptyCaseShift:44 � ArrayIndexOutOfBounds Index 0 o..."

Proceed to CycleSwap class and implement its static methods:

void cycleSwap(int[] array)
Shifts all the elements in the given array to the right by 1 position.
In this case, the last array element becomes first.
For example, 1 3 2 7 4 becomes 4 1 3 2 7.

void cycleSwap(int[] array, int shift)
Shift all the elements in the given array to the right in the cycle manner by shift positions.
Shift value is guaranteed to be non-negative and not bigger than the array length.
For example, 1 3 2 7 4 with a shift of 3 becomes 2 7 4 1 3.
For a greater challenge, try not using loops in your code (not mandatory).

Note that input array may be empty.


Examples
Code Sample:

int[] array = new int[]{ 1, 3, 2, 7, 4 };
CycleSwap.cycleSwap(array);
System.out.println(Arrays.toString(array));
Output:

[4, 1, 3, 2, 7]


Code Sample:

int[] array = new int[]{ 1, 3, 2, 7, 4 };
CycleSwap.cycleSwap(array, 2);
System.out.println(Arrays.toString(array));
Output:

[7, 4, 1, 3, 2]


Code Sample:

int[] array = new int[]{ 1, 3, 2, 7, 4 };
CycleSwap.cycleSwap(array, 5);
System.out.println(Arrays.toString(array));
Output:

[1, 3, 2, 7, 4]

My code is:

<pre>class CycleSwap {
     static void cycleSwap(int[] array) {
        int shift = 1;
 
        reverse(array, 0, array.length - 1);
        reverse(array, shift, array.length - 1);
    }
 
     static void cycleSwap(int[] array, int shift) {
         //shift = shift % array.length;
        reverse(array, 0, array.length - 1);
        reverse(array, 0, shift - 1);
        reverse(array, shift, array.length - 1);
    }
 
    private static void reverse(int[] nums, int i, int j) {
        while (i < j) {
            int temp = nums[i];
            nums[i] = nums[j];
            nums[j] = temp;
            i++;
            j--;
        }
    }
 
    public static void main(String[] args) {
        {
            int[] array = new int[]{1, 3, 2, 7, 4};
            CycleSwap.cycleSwap(array,2);
            System.out.println(Arrays.toString(array));
        }
        {
            int[] array = new int[]{};                                                        // I tried here to put this condition: if (array == null) { 
            CycleSwap.cycleSwap(array);                                               //                                                           System.out.println("0");
            System.out.println(Arrays.toString(array));                         //                                                        }
        }
        {
            int[] array = new int[]{};                                                          // here the same condition from above
            CycleSwap.cycleSwap(array, 3);
            System.out.println(Arrays.toString(array));
        }
 
 
     }
}
 
Output: 
[7, 4, 1, 3, 2]
[]
Exception in thread "main" java.lang.ArrayIndexOutOfBoundsException: Index 0 out of bounds for length 0
    at com.epam.rd.autotasks.CycleSwap.reverse(CycleSwap.java:22)
    at com.epam.rd.autotasks.CycleSwap.cycleSwap(CycleSwap.java:16)
    at com.epam.rd.autotasks.CycleSwap.main(CycleSwap.java:43)

Bounds bounds = scrollPane.getViewportBounds();
scrollPane.setVvalue(flowPane.getChildren().get(3).getLayoutY() * (1/(flowPane.getHeight()-bounds.getHeight())));

I am trying to find the path of resource using Paths like below and then copying some files at runtime. While at runtime it works perfectly fine. However while running locally for junit testing, it throws below error at the below first line while trying to get Path using URI. I am not using any zip/jar file so why I am getting the below stack trace. Am I missing something?

Path path= Paths.get(ABCD.class.resource("/").toURI());
String mockFileName="cacerts";
File mockFile= new File(path+File.seperator+mockfileName);

java.nio.file.FileSystemNotFoundException
    at com.sun.nio.zipfs.ZipFileSystemProvider.getFileSystem(ZipFileSystemProvider.java:171)
    at com.sun.nio.zipfs.ZipFileSystemProvider.getPath(ZipFileSystemProvider.java:157)
    at java.nio.file.Paths.get(Unknown Source)

Q1. Write a program using methods to find whether a point (x1,y1) lies on a circle of radius 2 cm and h = 5;  the equation of circle is given  by 〖(x-h)〗^2+〖(y-h)〗^2=r^2  . The method returns a Boolean value.

[httpGet]
public string ApplyGroupOperation (string values , string op)
{
string[]valueList = values.Split(Values , ',');
var result=0;
for (int i=0 ; i<valuelist.count ;="" i++)
switch(op)
{
case"+":
result+="int.parse(ValueList[i]);
break;
case"*":
result*=int.parse(ValueList[i]);
break;
default:
break;
}
}
return" result;
}
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