选择排序的简单记录

简单记录一下选择排序

/**
 * ClassName SelectionSort.java
 * author 舒一笑
 * version 1.0.0
 * Description 选择排序代码实现类
 * createTime 2024年01月17日 22:06:00
 */
public class SelectionSort {

    public static void selectionSort(int[] arr) {
        if (arr == null || arr.length < 2){
            return;
        }
        for (int i = 0; i < arr.length; i++) {
            int minIndex = i;
            for (int j = i + 1; j < arr.length; j++) {
                if (arr[j] < arr[minIndex]) {
                    minIndex = j;
                }
            }
            swap(arr, i, minIndex);
        }
    }

    public static void swap(int[] arr, int i, int j) {
        int temp = arr[i];
        arr[i] = arr[j];
        arr[j] = temp;
    }

    public static void main(String[] args) {
        int[] arr = new int[]{10, 8 ,3 , 5 , 7 , 1};
        for (int i = 0; i < arr.length; i++) {
            System.out.print(arr[i] + " ");
        }
        System.out.println();
        selectionSort(arr);
        for (int i = 0; i < arr.length; i++) {
            System.out.print(arr[i] + " ");
        }
    }
}
```
```