How to delete a single piece of data in JAVA?

To delete a single piece of data in Java, you can achieve this by following these steps:

1. Locate the location of the data to be deleted.
2. Delete the data from the data structure using a delete operation.

The specific method of deletion depends on the type of data structure. Here are some examples of deletion operations for common data structures:

1. Array: Elements in the array are stored in sequential order based on their index. Deletion can be achieved by moving all elements after the one to be deleted forward by one position and overwriting the element to be deleted.

public static void deleteElement(int[] array, int index) {
    for (int i = index; i < array.length - 1; i++) {
        array[i] = array[i + 1];
    }
    array[array.length - 1] = 0; // 将最后一个元素置为0或者null，表示删除
}

1. Linked List: The elements in a linked list are connected by pointers, and elements can be deleted by changing the pointers’ references.

public static void deleteNode(LinkedListNode node) {
    if (node == null || node.next == null) {
        return;
    }
    node.data = node.next.data;
    node.next = node.next.next;
}

1. Collection: The collection classes in Java offer a remove() method to delete a specified element.

List<Integer> list = new ArrayList<>();
list.add(1);
list.add(2);
list.add(3);
list.remove(1); // 删除索引为1的元素

Choose the appropriate data structure and deletion method based on the actual situation.