I am implementing an ArrayStack and we have to create a tester for it with JUnit and I wasn’t sure what to add to check if these two methods are working. The method addAll appends all values from the given list into the other list. Equals checks if two ArrayStacks are equal. I think I would have to crea…
Tag: arrays
Why do we initially set min and max to the first value in the array when trying to find the minimum and maximum value?
I’ve been learning Java for a while and I’ve run into a problem I can’t figure out. I am currently learning arrays and how to iterate through them using loops. I generally understand how the if statement and the for loop work, but in this case I don’t understand the principle of this l…
I am trying to add two float arrays into a third array but receive only zeros
I want to use 3 looping structures for three different arrays. The first loop generates numbers 0 to 49. The second loop takes the first loop numbers and squares them. The third loop holds the sum of all 49 values. If I put it all in a single statement, I get exactly what I want, except it doesn’t fill …
How to create an new one dimensional array with elements of a 2d array and return it?
I need tp create a new array with the elements of a 2d array in java. However, it only adds the last number of the 2d array which results in an array of the same value. Answer You have an outer loop for (int i = 0; i < 7; i++) that is causing the issues. The value of “i”
Randomly choose between of +, -, or * and apply it to two numbers
Good day I am new to java and would like to know if there is a way for me to randomly choose between multiplication and addition and apply it to two numbers. Any guidance would be appreciated. Answer I guess a code like the following could work:
How to implement a benchmark for a java mergesort program?
I want to implement a benchmark where the Method MergeSort and it’s performance is measured. I have tried to fill the array that is to be mergesorted with random numbers but when the code is run the array prints the same random number 10 times. Why is this? PS. I can’t post the entire program I ha…
The program cannot do compareTo function after the object’s update information
I am trying to change the position of the product in the print menu after updating some information of the product. Specifically, arrange “Quantity” in descending order. If the products have same quantity, the list will be sorted with the ascending “UnitPrice” field. Initially, if i ad…
Im trying to make a “graphic” printing a certain amount of characters based on array values java
I have to make a code thats contain a method that takes a vector of integers as a parameter and, from their values, prints a horizontal bar graph on the screen. I Just cant print the amount of characters with the value of the string. Rigth now i have a list in a method: And the output should be like
Fill the Third Array by adding the elements of the First and Second Arrays
I want to generate an array which content would represent a Cartesian product of the two given string-arrays. In other words, I need to concatenate each String from the first array arr1 with every String from the second array arr2. Here is my code: Current Output: Desired Output: How can I fix it? Answer You …
Exception in thread “main” java.util.regex.PatternSyntaxException: Illegal/unsupported escape sequence near index 2
I’m trying to remove some words from the line. I don’t want to prescribe them but replace them, because the words that I remove may increase. So I used an array. But when I try to do this, I get errors. I will be glad of any help. Answer This is a partial answer.. Problem #1: The Arrays.toString(a…