8000 java set to string · TGAMendis/CoreJava@0937e71 · GitHub
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JavaProgramTo.com
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java set to string
1 parent f3e60a9 commit 0937e71

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‎src/main/java/com/javaprogramto/java8/listoflists/ListOfListsIntegers.java

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package com.javaprogramto.java8.listoflists;
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import java.util.ArrayList;
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import java.util.List;
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import java.util.stream.Collectors;
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public class ListOfListsIntegers {
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public static void main(String[] args) {
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List<List<Integer>> listOfLists = new ArrayList<>();
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List<Integer> innerList1 = new ArrayList<>();
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innerList1.add(1);
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innerList1.add(2);
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innerList1.add(3);
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List<Integer> innerList2 = new ArrayList<>();
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innerList2.add(4);
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innerList2.add(5);
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innerList2.add(6);
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listOfLists.add(innerList1);
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listOfLists.add(innerList2);
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// System.out.println("Integer List of lists - "+listOfLists);
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for (List<Integer> list : listOfLists) {
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for (Integer i : list) {
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System.out.println(i);
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}
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}
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listOfLists.forEach(
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(List<Integer> innerList) ->
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innerList.forEach((Integer item) -> System.out.println(item)
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)
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);
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List<Integer> ints = listOfLists.stream()
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.flatMap(list -> list.stream())
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.collect(Collectors.toList());
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System.out.println("flat map ints - "+ints);
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}
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}

‎src/main/java/com/javaprogramto/java8/listoflists/ListOfListsStrings.java

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package com.javaprogramto.java8.listoflists;
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import java.util.ArrayList;
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import java.util.List;
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import java.util.stream.Collectors;
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public class ListOfListsStrings {
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public static void main(String[] args) {
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List<List<String>> listOfLists = new ArrayList<>();
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List<String> innerList1 = new ArrayList<>();
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innerList1.add("A");
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innerList1.add("B");
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innerList1.add("C");
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List<String> innerList2 = new ArrayList<>();
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innerList2.add("D");
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innerList2.add("E");
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innerList2.add("F");
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listOfLists.add(innerList1);
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listOfLists.add(innerList2);
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// System.out.println("List of lists - "+listOfLists);
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for (List<String> list : listOfLists) {
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for (String letter : list) {
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System.out.println(letter);
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}
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}
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listOfLists.forEach(
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(List<String> innerList) ->
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innerList.forEach((String item) -> System.out.println(item))
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);
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List<String> strings = listOfLists.stream()
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.flatMap(list -> list.stream())
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.collect(Collectors.toList());
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System.out.println("flat map strings - "+strings);
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}
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}

‎src/main/java/com/javaprogramto/java8/set/tostring/ApacheCommonsSetToStringExample.java

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package com.javaprogramto.java8.set.tostring;
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import java.util.HashSet;
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import java.util.Set;
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import org.apache.commons.lang3.StringUtils;
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public class ApacheCommonsSetToStringExample {
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public static void main(String[] args) {
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Set<String> hashSet = new HashSet<>();
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hashSet.add("list");
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hashSet.add("set");
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hashSet.add("map");
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String str1 = StringUtils.join(hashSet);
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System.out.println("with default delimiter");
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System.out.println("hashset in string - " + str1);
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String str2 = StringUtils.join(hashSet, ":");
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System.out.println("with custom delimiter");
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System.out.println("hashset in string - " + str2);
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}
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}

‎src/main/java/com/javaprogramto/java8/set/tostring/Java8SetToStringExample1.java

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package com.javaprogramto.java8.set.tostring;
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import java.util.HashSet;
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import java.util.LinkedHashSet;
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import java.util.Set;
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public class Java8SetToStringExample1 {
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public static void main(String[] args) {
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Set<String> hashSet = new HashSet<>();
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hashSet.add("java");
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hashSet.add("c++");
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hashSet.add("python");
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String str1 = String.join(" ", hashSet);
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System.out.println("String.join() hashset in string - " + str1);
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Set<String> linkedHashSet = new LinkedHashSet<>();
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linkedHashSet.add("javascript");
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linkedHashSet.add("typescript");
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String str2 = String.join(" ", linkedHashSet);
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System.out.println("String.join() linkedhashset in string - " + str2);
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System.out.println("With different delimiter");
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String str3 = String.join("**", hashSet);
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System.out.println("String.join() hashset to string - " + str3);
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String str4 = String.join("^^", linkedHashSet);
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System.out.println("String.join() linkedhashset to string - " + str4);
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}
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}

‎src/main/java/com/javaprogramto/java8/set/tostring/Java8SetToStringExample2.java

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package com.javaprogramto.java8.set.tostring;
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import java.util.HashSet;
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import java.util.LinkedHashSet;
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import java.util.Set;
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import java.util.stream.Collectors;
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public class Java8SetToStringExample2 {
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public static void main(String[] args) {
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Set<String> hashSet = new HashSet<>();
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hashSet.add("java");
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hashSet.add("c++");
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hashSet.add("python");
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String str1 = hashSet.stream().collect(Collectors.joining(":", "{", "}"));
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System.out.println("Collectors.joining() hashset in string - " + str1);
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Set<String> linkedHashSet = new LinkedHashSet<>();
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linkedHashSet.add("javascript");
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linkedHashSet.add("typescript");
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String str2 = linkedHashSet.stream().collect(Collectors.joining(":", "{", "}"));
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System.out.println("Collectors.joining() linkedhashset in string - " + str2);
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}
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}

‎src/main/java/com/javaprogramto/java8/set/tostring/SetToStringExample.java

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package com.javaprogramto.java8.set.tostring;
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import java.util.HashSet;
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import java.util.LinkedHashSet;
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import java.util.Set;
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public class SetToStringExample {
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public static void main(String[] args) {
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Set<String> hashSet = new HashSet<>();
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hashSet.add("java");
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hashSet.add("c++");
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hashSet.add("python");
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String str1 = hashSet.toString();
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str1 = str1.replaceAll("\\,|\\[|\\]|\\s", " ");
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System.out.println("hashset in string - " + str1);
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Set<String> linkedHashSet = new LinkedHashSet<>();
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linkedHashSet.add("javascript");
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linkedHashSet.add("typescript");
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String str2 = linkedHashSet.toString();
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str2 = str2.replaceAll("\\,|\\[|\\]|\\s", " ");
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System.out.println("linkedhashset in string - " + str2);
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}
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}

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