Java 冒泡排序代码：手把手教你写，贼简单！

public class BubbleSort {

public static void main(String[] args) {
    int[] arr = {5, 2, 9, 1, 5, 6, 3};
    bubbleSort(arr);
    System.out.println('排序后的数组为：');
    for (int num : arr) {
        System.out.print(num + ' ');
    }
}

public static void bubbleSort(int[] arr) {
    int n = arr.length;
    for (int i = 0; i < n - 1; i++) {
        for (int j = 0; j < n - i - 1; j++) {
            if (arr[j] > arr[j + 1]) {
                int temp = arr[j];
                arr[j] = arr[j + 1];
                arr[j + 1] = temp;
            }
        }
    }
}

}