Set
import java.util.HashSet;
import java.util.Iterator;
import java.util.Set;
public class Test_sort{
public static void main(String[] args) {
Set<Integer>set = new HashSet<>();
set.add(10);
set.add(60);
set.add(5);
set.add(55);
set.add(45);
for(Integer integer : set){
System.out.print(integer + "\t");
}
System.out.println();
Iterator<Integer>it = set.iterator();
while(it.hasNext()){
System.out.print(it.next() + "\t");
}
System.out.println();
Integer[]arr = new Integer[set.size()];
set.toArray(arr);
for(Integer integer : arr){
System.out.print(integer + "\t");
}
}
}
List
import java.util.ArrayList;
import java.util.Iterator;
import java.util.List;
import java.util.ListIterator;
public class list_Output{
public static void main(String[] args) {
List<Integer>list = new ArrayList<>();
list.add(10);
list.add(60);
list.add(5);
list.add(55);
list.add(45);
for(Integer integer : list){
System.out.print(integer + "\t");
}
System.out.println();
Integer[]arr = new Integer[list.size()];
list.toArray(arr);
for(Integer integer : arr){
System.out.print(integer + "\t");
}
System.out.println();
Iterator<Integer>it = list.iterator();
while(it.hasNext()){
System.out.print(it.next() + "\t");
}
System.out.println();
ListIterator<Integer>lit = list.listIterator();
while(lit.hasNext()){
System.out.print(lit.next() + "\t");
}
}
}
Map
import java.util.*;
public class mapOutput{
public static void main(String[] args) {
Map<String,Integer>map = new HashMap<>();
map.put("A",25);
map.put("B",14);
map.put("C",45);
map.put("D",35);
map.put("E",40);
Set<String>set1 = map.keySet();
for(String key : set1){
System.out.println("[key:" + key + "\tvalue:" + map.get(key) + "]");
}
System.out.println();
Set<String>set2 = map.keySet();
Iterator<String>it2 = set2.iterator();
while(it2.hasNext()){
String key = it2.next();
System.out.println("[key:" + key + "\tvalue:" + map.get(key) + "]");
}
System.out.println();
Set<Map.Entry<String,Integer>>set3 = map.entrySet();
Iterator<Map.Entry<String,Integer>>it3 = set3.iterator();
while(it2.hasNext()){
Map.Entry<String,Integer>entry = it3.next();
System.out.println("[key:" + entry.getKey() + "\tvalue:" + entry.getValue() + "]");
}
System.out.println();
Collection<Integer>set4 = map.values();
for(Integer value : set4){
System.out.println("value:" + value);
}
}
}