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Java tutorial
  • Java direct insertion sort

    Java direct insertion sort

    Java Direct Insertion Sort Direct insertion sort means to insert elements to be sorted one by one into the previously sorted ordered sequence until all elements have been inserted. The main steps are as follows: 1) First assume that the first element has
    2024-11-08
  • Java Selection Sort

    Java Selection Sort

    Java Selection Sort Selection Sort is a simple and intuitive sorting algorithm. Its algorithm principle is to first find the smallest (large) element in the unsorted sequence, store it at the starting position of the sorted sequence, and then Then continu
    2024-11-08
  • Java merge sort (Merge Sort)

    Java merge sort (Merge Sort)

    Java Merge Sort (Merge Sort) Merge Sort (MergeSort) is an effective and stable sorting algorithm based on the merge operation. This algorithm is a very typical application using the divide and conquer method (DivideandConquer). Merge sort combines two ord
    2024-11-08
  • Java Quick Sort (Quick Sort)

    Java Quick Sort (Quick Sort)

    Java Quick Sort (Quick Sort) Quick Sort (QuickSort) is an improvement on bubble sort based on the binary idea. The main idea is to establish a base, put the numbers smaller than the base to the left of the base, and put the numbers larger than the base to
    2024-11-08
  • Java bubble sort (Bubble Sort)

    Java bubble sort (Bubble Sort)

    Java Bubble Sort (Bubble Sort) 1. Bubble Sort Bubble Sort (BubbleSort) is a relatively simple sorting algorithm in programming. It repeatedly walks through the sequence to be sorted, comparing two elements at a time and swapping them if they are in the wr
    2024-11-08
  • Detailed explanation of Java Arrays.sort() method

    Detailed explanation of Java Arrays.sort() method

    Detailed explanation of the Java Arrays.sort() method. This method is a static method of the Arrays class, used to sort arrays. The time complexity is O(n*logn), and the method return value is void. After sorting, the sorted results are stored in the arra
    2024-11-08
  • Detailed explanation of Java Arrays.copyOfRange() method

    Detailed explanation of Java Arrays.copyOfRange() method

    Detailed explanation of the Java Arrays.copyOfRange() method. This method is used to intercept and copy an existing array, and copy an array with a closed left range and an open right range. Copy an original array starting from the subscript from to the s
    2024-11-08
  • Detailed explanation of Java Arrays.copyOf() method

    Detailed explanation of Java Arrays.copyOf() method

    Detailed explanation of the Java Arrays.copyOf() method. The array returned by this method is a new array object. Changing the element values ​​in the returned array will not affect the original array. The first variable represents the original array obje
    2024-11-08
  • Detailed explanation of Java Arrays.fill() method

    Detailed explanation of Java Arrays.fill() method

    Detailed explanation of Java Arrays.fill() method in JavaAPI: publicstaticvoidfill(Object[]a, intfromIndex, inttoIndex, Objectval) assigns the specified Object reference to the specified Object array...
    2024-11-08
  • Java Arrays class

    Java Arrays class

    Java Arrays Class Java provides a tool class specifically for operating arrays, the Arrays class, located in the java.util package. The Arrays class contains various methods for manipulating arrays, such as sorting and searching. In addition, the Arrays c
    2024-11-08
  • Java irregular array

    Java irregular array

    Java Irregular Arrays Through the study in the previous section, we know that there is no concept of multi-dimensional arrays in Java, only one-dimensional arrays. We can understand multi-dimensional arrays as arrays of arrays, so an irregular array will
    2024-11-08
  • Java multidimensional array

    Java multidimensional array

    We need to know about Java multi-dimensional arrays. There is no concept of multi-dimensional arrays in Java, because from the perspective of the underlying operating mechanism of arrays, Java does not have multi-dimensional arrays. However, Java provides
    2024-11-08
  • Java two-dimensional array

    Java two-dimensional array

    Java two-dimensional array In Java, a two-dimensional array is regarded as an array of arrays, that is, a two-dimensional array is a special one-dimensional array, and each element of the two-dimensional array is a one-dimensional array. 1. Definition of
    2024-11-08
  • Java Map collection

    Java Map collection

    Java Map collection Map is a container that stores elements according to keys. Keys are like subscripts. In List, subscripts are integers. In Map, keys can be objects of any type. There cannot be duplicate keys in the Map, and each key has a corresponding
    2024-11-08
  • Java Set collection

    Java Set collection

    Java Set Collection Set collection is a collection composed of a series of unordered, non-repeated elements of the same type, because when storing data, the hashCode value of its elements must be determined first, and if it is different, it will be stored
    2024-11-08
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