what is  Array.Reverse method ?

In java  i have some code for a method that finds the index of an integer that is passed in thet int is (target) the method also has the array called (array) and the first and last element of the array. also for this method to work the array has to be in descending order "static int find(int [] array, int first, int last, int target)" thats the method with all the variables that are passed to it  my guess is that the first if statement just will have a short line that is "return -1;" because since the array has to be in descending order the first element cant be greater then the last element in the array but im confused on the rest because i cant find a way to make them one line codes with the conditions that i have to meet in the comments any help would be aprreaciated

In Java: Write a method that multiplies all elements in the array by 3 and returns it to the main method.

4. Now examine the ArrayList methods in the above table, a) Which method retrieves elements from the ArrayList? b) Which method replaces the value of an element that already exists in the ArrayList? c) Which two methods initializes the value of an element? d) How do the two methods in (c) differ? Which method(s) would be appropriate in the above Java program (after we convert it to work with ArrayLists)?

Java ArrayLists can only be filled with reference type data, so you cannot fill them with primitive type data. How can you work around this with integers? (How can you have an ArrayList filled with integers?)

Define an empty array with 4 elements inside the "main" method. The value '-1' from the user to this arrayRecord the numbers entered by the user in order until they arrive. User array with 4 elementsAfter adding, write the required method so that it can continue adding elements. This method will take the array as a parameter, expand the size of the array and return the array variable.will return. Using this method you defined, the user can add elements to the array.make it continue.

Without using any pre-defined method. Don't copy from internet Two array is given and you check whether these array is equal or not in java. Without using any pre-defined method

For java. Refer to picture.

Thank you.  Plz provide a screenshot of the code. Further I want to write method 4 and called method 3(u just wrote) from method 4. Method 4: A method to count the occurrences of each value in an array takes one parameter, an array of integers returns an array containing the number of times each value occurs in the parameter array