Java 基础一些代码练习笔记（ArrayEquals）

import java.util.Arrays;public class ArrayEquals{public static boolean isEquals(int[] a , int[] b){if (a == null || b == null){return false;}if (a.length != b.length){return false;}for (int i = 0; i < a.length; i++ ){if (a[i] != b[i]){return false;}}return true;}public static void main(String[] args){int [] a = {1,2,3,4};int [] b = {1,2,3,4};System.out.println(isEquals(a,b));System.out.println("-------------------");System.out.println(Arrays.equals(a, b));}}

冒泡排序

public class BubbleSortTest{public static void bubbleSort(int[] array){for (int i = 0; i < array.length - 1; i++ ){for (int j = 0; j < array.length- 1 - i; j++ ){if (array[j] > array[j + 1]){int temp = array[j];array[j] = array[j + 1];array[j + 1] = temp;}}System.out.println("第" +(i + 1)+ "趟排序");for (int k = 0; k < array.length; k++ ){System.out.print(array[k] + " ");}System.out.println();}}public static void main(String[] args){int [] array = {4,7,8,9,3,2};bubbleSort(array);for (int i = 0; i<array.length; i++ ){System.out.println(array[i]);}}}