public class InsertionSort {

    private InsertionSort() {
    }

    public static <E extends Comparable<E>> void sort2(E[] arr) {
        for (int i = 0; i < arr.length; i++) {
            //将arr[i]插入到合适的位置
            E temp = arr[i];
            for (int j = i; j > 0; j--) {
                if (temp.compareTo(arr[j - 1]) < 0) {
                    arr[j] = arr[j - 1];
                } else {
                    arr[j] = temp;
                    break;
                }
            }
        }
    }

    public static <E extends Comparable<E>> void sort(E[] arr) {
        for (int i = 0; i < arr.length; i++) {
            //将arr[i]插入到合适的位置
            for (int j = i; j > 0; j--) {
                if (arr[j].compareTo(arr[j - 1]) < 0) {
                    swap(arr, j, j - 1);
                } else {
                    break;
                }
            }
        }
    }

    private static <E> void swap(E[] arr, int i, int j) {
        E temp = arr[i];
        arr[i] = arr[j];
        arr[j] = temp;
    }

}

public class SelectionSort {

    private SelectionSort() {
    }

    public static <E extends Comparable<E>> void sort(E[] arr) {
        for (int i = 0; i < arr.length; i++) {
            //选择arr[i...n)中最小值的索引
            int minIdx = i;
            for (int j = i; j < arr.length; j++) {
                if (arr[j].compareTo(arr[minIdx]) < 0) {
                    minIdx = j;
                }
            }
            swap(arr, i, minIdx);
        }
    }

    private static <E> void swap(E[] arr, int i, int minIdx) {
        E temp = arr[i];
        arr[i] = arr[minIdx];
        arr[minIdx] = temp;
    }
}

public class LinearSearch {

    private LinearSearch() {
    }

    /**
     * 查找元素在数组中的索引，数组中不包含元素时，返回-1
     *
     * @param data   数组
     * @param target 要查找的元素
     * @return 元素在数组中的索引，数组中不包含元素时，返回-1
     */
    public static <E> int search(E[] data, E target) {
        for (int i = 0; i < data.length; i++) {
            if (data[i].equals(target)) {
                return i;
            }
        }
        return -1;
    }

    public static void main(String[] args) {
        Integer[] data = {24, 18, 26, 38, 95, 28, 94, 73, 85, 73};
        int index = search(data, 7);
        System.out.println(index);

        index = search(data, 94);
        System.out.println(index);
    }

}