JAVA TECHNOLOGY

LinkedHashMap:- LinkedHashMap is child class of HashMap class where object store in the form of key value pair and maintain insertion order. Example1:- TestMap.java import java.util.*; class TestMap { public static void main(String[]args) { Map m=new LinkedHashMap(); m.put(101,"Java"); m.put(102,"Cpp"); m.put(103,"C#"); m.put(104,"C"); m.put("Amit",101); m.put("Neha",102); System.out.println(m); } } Output:- {101=Java, 102=Cpp, 103=C#, 104=C, Amit=101, Neha=102} Example2:-TestMap.java import java.util.*; class TestMap { public static void main(String[]args) { Map<Object,Object> m=new LinkedHashMap<Object,Object>(); m.put(101,"Java"); m.put(102,"Cpp"); m.put(103,"C#"); m.put(104,"C"); m.put("Amit",101); m.put("Neha",102); Set s=m.entrySet(); Iterator itr=s.iterator(); System.out.println(...