of("🌴", "🌱", "🍂", "🌷", "🌵"); String str = String.join(",", list); System.out.println(str); // 🌴,🌱,🍂,🌷,🌵 Convert a list to a comma-separated string using Java streams You can also use the Java Stream API to transform a list of strings into a...
packagecom.mkyong.test;importjava.util.Arrays;importjava.util.List;importjava.util.Scanner;importjava.util.stream.Collectors;publicclassJava9Example1{publicstaticvoidmain(String[] args){ List<String> numbers = Arrays.asList("1","2","A","B","C1D2E3"); List<List<String>> collect = numbers...
In the example above,we create aBufferedReaderobject wrapped around theInputStreamusing anInputStreamReader. This allows us to read lines of text efficiently from theInputStream.Additionally, thelines()method of theBufferedReaderreturns aStream<String>containing the lines read from the input. Lastly,...
converting between a list and a set in java how to convert between a list and a set using plain java, guava or apache commons collections. read more → 2. sample data structure first, we’ll model the element: public class animal { private int id; private string name; // constructor/...
java import java.util.Arrays; import java.util.List; import java.util.stream.Collectors; public class Main { public static void main(String[] args) { String[] stringArray = {"apple", "banana", "cherry"}; List<String> stringList = Arrays.stream(stringArray).collect(Collectors.toL...
The following is an example of converting an integer to a string with a map ?Open Compiler import java.util.Arrays; public class Demo { public static void main(String[] args) { Arrays.asList(20, 50, 100, 200, 250, 300, 500, 550, 600, 700) .stream() .filter(val -> val > 400...
import java.io.*; import java.util.*; public class TestClass{ public static void main(String[] args) { try { FileInputStream fis = new FileInputStream("in.txt"); BufferedInputStream bStream = new BufferedInputStream(fis); ByteArrayOutputStream baous = new ByteArrayOutputStream(); int ...
import java.io.*; public class Example1 { public static void main(String[] args) throws IOException { try { // initializing a string String inputString = "Hello! this is Tutorials Point!!"; // converting the string to InputStream InputStream streamIn = new ByteArrayInputStream(inputString...
String in Java. An InputStream is a stream of bytes that can be further used to perform several tasks like reading. In general, it is a class that contains everything in bytes. If we want to convert this stream of bytes to any other type of data, we may have to use specific ...
util.List; import java.util.Map; import java.util.stream.Collectors; public class Test { public static void main(String[] args) { List<Book> bookList = new ArrayList<>(); bookList.add(new Book(1, "Barney's Version", "Mordecai Richler")); bookList.add(new Book(2, "The Unsettlers...