compare two lists java code example

Example 1: compare two strings java

String string1 = "using equals method";String string2 = "using equals method";        String string3 = "using EQUALS method";String string4 = new String("using equals method"); assertThat(string1.equals(string2)).isTrue();assertThat(string1.equals(string4)).isTrue(); assertThat(string1.equals(null)).isFalse();assertThat(string1.equals(string3)).isFalse();

Example 2: join two lists java

List<String> newList = Stream.concat(listOne.stream(), listTwo.stream())
                             .collect(Collectors.toList());

Example 3: java compare lists

List<String> firstList=Arrays.asList("Hello","World");
List<String> secondList=new ArrayList<>(firstList);
System.out.println(firstList.equals(secondList));//true
secondList.add("other element");
System.out.println(firstList.equals(secondList));//false