// getRandom函数,随机取返回一个东西(不考虑删除的情况,0~size中间中间有洞) public K getRandom() { if (size == 0) { return null; } int index = (int)(Math.random()*size); //0~size上是无序的,但是要保证中间没洞 return this.map2.get(index); } } public static void main(String[]...
注:int的最大值可以通过其对应的封装类Integer.MAX_VALUE获取 7.字符串转换 ①数字转字符串 方法1:使用String类的静态方法valueOf() int i=5;//给变量i赋值 String str=String.valueOf(i);//调用String类的静态方法转换成字符串 1. 2. 方法2:先把基本类型装箱为对象,然后调用对象的toString int i=5;//...
obj = new RandomizedCollection();44* boolean param_1 = obj.insert(val);45* boolean param_2 = obj.remove(val);46* int param_3 = obj.getRandom();47*/
2.1. Single Random Item In order to select a random index, you can use Random.nextInt(int bound) method: public void givenList_shouldReturnARandomElement() { List<Integer> givenList = Arrays.asList(1, 2, 3); Random rand = new Random(); int randomElement = givenList.get(rand.nextInt...
}intgetRandom() {returnnums[rand() %nums.size()]; }private: vector<int>nums; unordered_map<int,int>m; }; Github 同步地址: https://github.com/grandyang/leetcode/issues/380 类似题目: Insert Delete GetRandom O(1) - Duplicates allowed ...
public class JavaCoreExample { public static void main(String[] args) { // Call System property to get the classpath value String classpathStr = System.getProperty("java.class.path"); System.out.print(classpathStr); } } If you run the program using sbt run or another launcher like Ma...
import java.util.Random; public class Demo { static Random randNum = new Random(); public static void main(String args[]) { System.out.println("Lowercase random letters..."); for (int i = 0; i < 5; i++) { System.out.println("" + "abcdefghijklmnopqrstuvwxyz".toCharArray()[rand...
Java.Util.Concurrent Java.Util.Concurrent.Atomic Java.Util.Concurrent.Locks Java.Util.Functions Java.Util.Jar Java.Util.Logging Java.Util.Prefs Java.Util.RandomGenerators Java.Util.Regex Java.Util.Streams Java.Util.Zip Javax.Annotation.Processing Javax.Crypto Javax.Crypto.Interfaces Javax.Crypto.Spec ...
Java使用JDBC将CSV文件中数据复制(copy)到Postgres Java Stream处理大量数据时显示处理进度信息方法及示例代码 Java 不同于java.util.Random生成随机数的方法及示例代码 Java约束两个实例变量有相同的泛型类型方法及示例代码 Java使用JWT和Spring基于token验证登陆权限(非cookie) Java EasyExcel创建读写操作Excel(....
satelliteIndex Int32 An index from zero to #getSatelliteCount() - 1 Returns Int32 Attributes RegisterAttribute Remarks Gets the identification number for the satellite at the specific index. This svid is pseudo-random number for most constellations. It is FCN & OSN ...