java string

public class Test { public static void main(String[] args) { String str = “Learn Java with alegrucoding.com”; String result = str.replaceAll(“\\s”, “”); System.out.println(result); } } Output: LearnJavawithalegrucoding.com import org.apache.commons.lang3.StringUtils; public class Test { public static void main(String[] args) { String str = “Learn Java with alegrucoding.com”; String result = StringUtils.deleteWhitespace(str); System.out.println(result); } } Output: LearnJavawithalegrucoding.com

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class PrintArrayElementsExample { public static void main(String[] args) { int[] arr1 = {1, 7, 9, 5, 2, 8, 3}; String[] arr2 = {“Megan”, “Tom”, “Melissa”, “John”, “Steve”}; // print elements of the arr1 System.out.println(Arrays.toString(arr1)); // print elements of the arr2 System.out.println(Arrays.toString(arr2)); } } Output: [1, 7, 9, 5, 2, 8, 3] [Megan, Tom, Melissa, John,…

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public class SplitString { public static void main(String[] args) { String names = “Tom,Steve,John,Megan,Melissa”; // split string String[] arr = names.split(“,”); // print the size of the array System.out.println(arr.length); // print the elements Stream.of(arr).forEach(System.out::println); } } Output: 5 Tom Steve John Megan Melissa   If you need a list, instead of an array, use the…

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import java.io.ByteArrayInputStream; import java.io.InputStream; import java.util.*; class ConvertInputStreamToString { public static void main(String[] args) { String resultString; String str = “Some String”; // create InputStream using the bytes from the above String InputStream inputStream = new ByteArrayInputStream(str.getBytes()); // Convert data from InputStream into a new String try (Scanner scanner = new Scanner(inputStream).useDelimiter(“\\A”)) { resultString =…

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In the previous post, we covered a String to Date conversion. In this post, you will learn to convert LocalDate and LocalDateTime to String in Java. LocalDate and LocalDateTime are immutable date-time objects that represent a date and a date and time. Convert LocalDate to String in Java Below is the program that parses a LocaDate object to a String using…

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In this lesson, you will learn to convert String to LocalDate and LocalDateTime objects. LocalDate and LocalDateTime are immutable date-time objects representing a date and a date and time. To convert String to one of the two Date objects, the provided String must represent a valid date or time according to ISO_LOCAL_DATE or ISO_LOCAL_DATE_TIME.  Otherwise, a DateTimeParseException will…

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We can convert boolean to String in Java using the following methods: String.valueOf() method Boolean.toString() method Convert boolean to String in Java using the String.valueOf() method There are multiple overloaded versions of the valueOf() method from the String class. We will use the one which accepts boolean. Example class Test { public static void main(String[] args)…

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To convert String to boolean in Java, you can use one of the following methods: Boolean.parseBoolean() method BooleanUtils.toBoolean() method Boolean.valueOf() method if we need a Boolean object instead of a primive Convert String to boolean in Java using the Boolean.parseBoolean() method With the parseBoolean(String s) method of the Boolean class, if we want to get…

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We can convert float to String in Java using the following methods: String.valueOf() method Float.toString() method Convert float to String in Java using the String.valueOf() method There are multiple overloaded versions of the valueOf() method from the String class. We will use the one which accepts float. Example class Test { public static void main(String[] args)…

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We can convert Double to String in Java using the following methods: String.valueOf() method Double.toString() method Convert Double to String in Java using the String.valueOf() method There are multiple overloaded versions of the valueOf() method from the String class. We will use the one which accepts double. Example class Test { public static void main(String[] args)…

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