class ArrayEx2 {
	public static void main(String [] args) {
		// using initializer list to create
		// and initialize the array.
		int [] data = {5,7,1,9,20};
		/*
		 * data[0] contains 5
		 * data[1] contains 7
		 * data[2] contains 1
		 * data[3] contains 9
		 * data[4] contains 20
		 *
		 */
		 printArray(data);		 
		
	 }
	 public static void printArray(int [] data){
		 for(int i = 0; i < data.length; i++)
		 System.out.print(data[i] + "  ");

		 System.out.println();
	 }
 }
 

• The following piece of code will search the array for the value 9 and print out wether 9 is in the array or not. Add it to the above main method.

 boolean isNine = false;
 for(int j = 0; j < data.length; j++){
    if( data[j] == 9 ){
      isNine = true;
    }
 }
 if (isNine)
 System.out.println("9 is in the list ");
 else
 System.out.println("9 is not in the list");
 

• Write the code that will replace all occurrences of the value 1 with 10. Do this in the main method
• Print out the array. Just call the function.
• Study the print function. Write a method that will take in an array of integers and return the first element in the array.

• A method called smallestIndex, that takes as its parameter the array and returns the index of the (first occurrence of the) smallest element in the array. Also test your method
• Write a method that inputs an integer array and swaps the first and last element of the array.
• Write a method that inputs an integer array and an integer. The method will return the number of times the integer appears in the array.

• Write the definition of method one so that it returns the sum of x and y if x is greater than y; otherwise, it should return x minus 2 times y.
• Write the definition of method two as follows:
• Read a number and store it in z.
• Update the value of z by adding the value of parameter a to its previous value.
• Assign the variable first the value returned by method one with the parameters 6 and 8.
• Update the value of first by adding the value of x to its previous value.
• If the value of z is more than twice the value of first, return z; otherwise, return 2 times first minus z.
• Write a program that tests your methods