In Java, the HashMap class implements the Map interface which allows us to store key and value pair, where keys should be unique.This section contains the solved programs on Java HashMap collection, practice these programs to learn the concept of Java HashMap collection and example of its ...
importjava.util.*;publicclassArraySort {publicstaticvoidmain(String[] args) {//实例化一个List集合,用来存放intList<Integer> list =newArrayList<Integer>();for(inti = 0; i < 100; i++) {//执行100次for,获取随机整数,并放在集合中list.add((int) (Math.random() * 1000));//System.out.prin...
In the Rust programming language, a HashMap stores the values by key. HashMap keys can be booleans, integers, strings, or any other type that implements the Eq and Hash traits.Practice these Rust HashMap programs to learn the concept of HashMap in Rust language, these programs contain the...
import java.util.Random;import java.util.Set;public class Practice {public static void main(String[] args) {HashMap map = new HashMap();for (int i = 0; i < 50; i++){Random r = new Random();int num = (r.nextInt(41) + 10);map.put(new Integer(i),new Integer(num));...
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This tutorial explains how to initialize a HashMap in Java. It also explains how to create mutable and immutable maps in Java.