Please ensure that: Your code is properly formatted as code block - see the sidebar (About on mobile) for instructions You include any and all error messages in full You ask clear questions You demonstrate effort in solving your question/problem - plain posting your assignments is forbidden (and such posts will be removed) as is asking for or giving solutions. Trying to solve problems on your own is a very important skill. Also, see Learn to help yourself in the sidebar If any of the above points is not met, your post can and will be removed without further warning. Code is to be formatted as code block (old reddit: empty line before the code, each code line indented by 4 spaces, new reddit: https://i.imgur.com/EJ7tqek.png ) or linked via an external code hoster, like pastebin.com, github gist, github, bitbucket, gitlab, etc. Please, do not use triple backticks (```) as they will only render properly on new reddit, not on old reddit. Code blocks look like this: public class HelloWorld { public static void main(String[] args) { System.out.println("Hello World!"); } } You do not need to repost unless your post has been removed by a moderator. Just use the edit function of reddit to make sure your post complies with the above. If your post has remained in violation of these rules for a prolonged period of time (at least an hour), a moderator may remove it at their discretion. In this case, they will comment with an explanation on why it has been removed, and you will be required to resubmit the entire post following the proper procedures. To potential helpers Please, do not help if any of the above points are not met, rather report the post. We are trying to improve the quality of posts here. In helping people who can't be bothered to comply with the above points, you are doing the community a disservice. I am a bot, and this action was performed automatically. Please contact the moderators of this subreddit if you have any questions or concerns. More on reddit.com

Hello everyone i am trying to remove an name that the user has put in from an String Array, i am new to programming and i have tried this but it doesn't work. Can someone help me or tell me what i am More on stackoverflow.com

The problem is in this part: for (Student i : roster) { int sId = i.getId(); if (id == sId) { roster.remove(id); } else if (id != sId) { System.out.println("ERROR: Invalid student ID.\n"); } } You can't remove items from the list while you're looping through it with this for loop. If you want to use a loop, you should use this kind of loop: for (int i = 0; i < roster.size(); ++i) { Student s = roster.get(i); int sId = s.getId(); if (id == sId) { roster.remove(i); i--; // This is important! } } See, this lets you remove the student at the current index. However, as you remove it, you have to decrement the index, otherwise you'll skip the next item in the list. More on reddit.com

I’m on my phone so I’ll just explain what im thinking in pseudo code, but why don’t you just do something like: Create a new array of size n-1 where n is the size of the original array. Iterate over the old array in a for loop, adding each element to the new array. If the element at the ith position equals the element to remove, continue to the next iteration. Would that work? EDIT: I'm at my PC now so here's the code. I ended up doing it a little differently than I mentioned above. Note that it doesn't account for if the element appears multiple times in the array or when the element does not exist. public static void main(String []args) { int[] myArray = { 5,6,9,4 }; int[] newArray = removeElem(myArray, 9); for (int i = 0; i < newArray.length; i++) System.out.print(newArray[i] + " "); } public static int[] removeElem(int[] array, int value) { int index = -1; // First confirm the element to remove exists in the array for (int i = 0; i < array.length; i++) { // If it does, store its index if (array[i] == value) index = i; } // If element exists if (index != -1) { int[] newArray = new int[array.length - 1]; for (int i = 0; i < array.length; i ++) { if (i < index) newArray[i] = array[i]; else if (i > index) newArray[i - 1] = array[i]; } return newArray; } // Do some error handling for if the element does not exist else return array; } Output is: 5 6 4 More on reddit.com