In Java programming, converting an int to a String involves transforming a numeric value of type int into its string representation. The string representation allows the number to be treated as a sequence of characters rather than a numerical value. This conversion is particularly useful when you need to concatenate the int value with other…
Read More Convert int to String in JavaWhen working with Java programming, it is often essential to determine whether a given string represents a numeric value. This task is crucial for a variety of scenarios, such as validating user input, performing calculations, or processing data. By accurately identifying numeric strings, you can ensure the correctness and integrity of your application’s logic. The…
Read More Java: Check if String is NumericWhen working with strings in Java, it is essential to check if a string is null or empty. A null string refers to the absence of any value, while an empty string is a string with zero characters. Failing to handle null or empty strings appropriately can lead to unexpected errors and undesired behavior in…
Read More Check if String is Null or Empty in JavaReversing a string is a common task in Java programming, and there are several ways to accomplish this. In this tutorial, we’ll explore four different methods for reversing a string in Java, using the StringBuilder class, the for loop, recursion, and a character array. We’ll provide examples of each method and explain how they work.…
Read More Reverse a String in JavaWorking with strings is a fundamental aspect of programming, and Java provides a rich set of tools and methods for manipulating strings. One common task when working with strings is to remove whitespace characters such as spaces, tabs, and newlines. There are several ways to accomplish this in Java, including using the replaceAll() method from…
Read More Removing Whitespaces in Java StringsConvert char to String in Java using the String.valueOf() method There is a valueOf() static method in the String class that returns the String representation of its argument, which can be a char or any other data type. public class Test { public static void main(String[] args) { char ch = ‘a’; String str =…
Read More Convert Char to String in Javaclass 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,…
Read More Print Array Elements in Javapublic 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…
Read More Split a comma-separated String in JavaOutput: Some String Here, we put the creation of the Scanner object into a try-with-resources because we want to close the Scanner after it reads all the data. We passed the “\\A” to tell the Scanner to read the entire input stream. import java.io.ByteArrayInputStream; import java.io.IOException; import java.io.InputStream; import java.nio.charset.StandardCharsets; class ConvertInputStreamToString { /** *…
Read More Convert InputStream to a String in Javaclass EscapeDoubleQuotesInString { public static void main(String[] args) { String str = “Hello, I’m \”Steve\” and I am \”Java\” developer”; System.out.println(str); } } Output: Hello, I’m “Steve” and I am “Java” developer Escape double quotes in a JSON object in Java There are many cases where you might need to escape double quotes. In this…
Read More Escape Double Quotes in Java StringIn 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. Both of the examples below make use of java.time package. For more information about Java packages, check out our…
Read More Convert LocalDate and LocalDateTime to String in JavaIn 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…
Read More Convert String to Date in JavaWe 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)…
Read More Convert boolean to String in JavaTo 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…
Read More Convert Java String to booleanTo convert String to char in Java we can use the charAt() method of the String class. This method returns the char value at the specified index. Syntax public char charAt(int index) Example class Test { public static void main(String[] args) { char ch = “java”.charAt(1); // returns char ‘a’ System.out.println(“char: ” + ch); } }…
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