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九肽荷尔蒙

浅尝辄止,贪得无厌
搜索到 12 篇与 JavaSE 的结果
2021-09-24

HashMap源码注释(jdk7)

HashMap源码注释(jdk7)
属性public class HashMap<K, V> extends AbstractMap<K, V> implements Map<K, V>, Cloneable, Serializable { /** * 序列号 */ private static final long serialVersionUID = 362498820763181265L; /** * HashMap数组结构的默认容量,容量必须为2的整数次幂,此处为16 */ static final int DEFAULT_INITIAL_CAPACITY = 1 << 4; /** * HashMap数组的最大容量,其值必须为小于等于2的30次幂且为2的非负整数次幂 */ static final int MAXIMUM_CAPACITY = 1 << 30; /** * HashMap默认的装载因子 */ static final float DEFAULT_LOAD_FACTOR = 0.75f; /** * Ha...
九肽荷尔蒙
2021-09-24

JavaSE

348 阅读
0 评论
2021年09月24日
348 阅读
0 评论
2021-09-06

Java冒泡排序

Java冒泡排序
import java.util.Scanner;//导入扫描器包 public class ArraySort { public static void main(String[] args) {//冒泡排序算法 System.out.println("请输入几个数并用逗号隔开:"); Scanner sc = new Scanner(System.in); String str = sc.next();//连续从键盘录入数据 String[] arr = str.split(",");//通过逗号将数据分割开,变成字符型数组 int[] b = new int[arr.length]; //字符型数组变成整形数组 for(int j = 0; j<b.length;j++) { b[j] = Integer.parseInt(arr[j]);//将数据变成整型 } for(int i=0;i<b.length-1;i++) {//0,...
九肽荷尔蒙
2021-09-06

JavaSE

179 阅读
0 评论
2021年09月06日
179 阅读
0 评论
2021-08-24

Java math.round四舍五入方法

Java math.round四舍五入方法
public class Test7 { public static void main(String[] args) { /** * 数学里面 四舍五入是不看负号的。 * Math.round方法里面是每次都自动+0.5 然后向下取整。 * 所以Math.round(-1.5)结果是-1, Math.round(-1.6)结果是-2 */ long d1 = Math.round(-1.5); //结果是 -1 long d2 = Math.round(-1.6); //结果是 -2 long d3 = Math.round(-2.5); //结果是 -2! long d4 = Math.round(2.5); //结果是 3 System.out.println(d1); System.out.println(d2); System.out.println(d3); System.out.println(d4); }}
九肽荷尔蒙
2021-08-24

JavaSE

182 阅读
0 评论
2021年08月24日
182 阅读
0 评论
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