To check whether the entered value is ASCII 7-bit numeric, check the character from ‘0’ to ‘9’.Here, we have a numeric character.char one = '9';Now, we have checked a condition with if-else for numeric character from ‘0’ to ‘9’if (c >= '0' && c = '0' && c = '0' && c = '0' && c

To check whether the entered value is ASCII 7-bit numeric and character (alphanumeric), check the characters ASCII value for −A to Z Or a to z Or 0 to 9Here, we have the following value −char one = '5';Now, we have checked some conditions with if-else for ASCII 7-bit numeric and character.if ((one >= 'A' && one = 'a' && one = '0' && one = 'A' && one = 'a' && one = '0' && one = 'A' && one = 'a' && one = '0' && one

In this article, we will learn to subtract the week from the current date using Java. This is useful when you need to manipulate dates, such as calculating dates from previous weeks for scheduling or tracking purposes. We'll use two approaches: using the Calendar class and the LocalDate class, showcasing how to easily adjust dates. Problem Statement Write a program in Java to subtract a specified number of weeks from the current date and display the updated date − Input Run the program Output Current Date = Mon Nov 04 09:41:18 IST 2024 Updated Date = Mon Oct 21 09:41:18 ... Read More

All distinct elements of an array are printed i.e. all the elements in the array are printed only once and duplicate elements are not printed. An example of this is given as follows.Array = 1 5 9 1 4 9 6 5 9 7 Distinct elements of above array = 1 5 9 4 6 7A program that demonstrates this is given as follows.Example Live Demopublic class Example {    public static void main (String[] args) {       int arr[] = {1, 5, 9, 1, 4, 9, 6, 5, 9, 7};       int n = arr.length;   ... Read More

The array is cyclically rotated clockwise by one. This means that each of the array elements are displayed to the right by one and the last element ends up as the first element. An example of this is given as follows.Original array = 1 2 3 4 5 6 7 8 9 10 Rotated array = 10 1 2 3 4 5 6 7 8 9A program that demonstrates this is given as follows.Example Live Demopublic class Example {    public static void main(String[] args) {       int[] arr = {1, 2, 3, 4, 5, 6, 7, 8, 9, ... Read More

Use the replaceFirst() method to replace only first occurrences of given String with new one.Let’s say we have the following string.String str = "THIS IS DEMO TEXT!";We have to replace the first occurrence of “IS” with “EV”. For that, use replaceFirst() method.str.replaceFirst("IS", "EV");The following is the final example, wherein the first occurrence of “IS” is replaced.Example Live Demopublic class Demo {    public static void main(String[] args) {       String str = "THIS IS DEMO TEXT!";       System.out.println("String = "+str);       System.out.println("Replacing only the first occurrence of substring IS...");       System.out.println("Updated string = ... Read More

Let’s say the following is our string.THIS IS DEMO TEXT!Here, to replace every occurrence of ‘I’ with ‘E’, use the replace() method.str.replace('I', 'E'));The following is the complete example to replace all occurrences of a given character with new character.Example Live Demopublic class Demo {    public static void main(String[] args) {       String str = "THIS IS DEMO TEXT!";       System.out.println("String = "+str);       System.out.println("Updated string = "+str.replace('I', 'E'));    } }OutputString = THIS IS DEMO TEXT! Updated string = THES ES DEMO TEXT!

Let’s say the following is our string.String str = "The Walking Dead!";We want to replace the substring “Dead” with “Alive”. For that, let us use the following logic. Here, we have used a while loop and within that found the index of the substring to be replaced. In this way, one by one we have replaced the entire substring.int beginning = 0, index = 0; StringBuffer strBuffer = new StringBuffer(); while ((index = str.indexOf(subStr1, beginning)) >= 0) {    strBuffer.append(str.substring(beginning, index));    strBuffer.append(subStr2);    beginning = index + subStr1.length(); }The following is the complete example to replace substrings.Example Live Demopublic class ... Read More

In this article, we use the trim() method to remove whitespace at the beginning and end of a string. This method does not modify the original string; instead, it returns a new string with the leading and trailing whitespace removed. Let’s say the following is our string with whitespace − string = " Tutorialspoint "; Now, let us trim all the whitespaces from the beginning and the end. String trimmed = string.trim(); Removing whitespace using trim () Method The trim() method in Java is a built-in function of the String class that removes ... Read More

Use the replace() method to replace a specific character with another. Let’s say the following is our string and here we are replacing a whitespace with a $ character.String str1 = "Orange is the new Black!";Now, use the replace() method to replace a character with $str1.replace(' ', '$');Example Live Demopublic class Demo {    public static void main(String[] args) {       String str1 = "Orange is the new Black!";       System.out.println("String: "+str1);       String str2 = str1.replace(' ', '$');       System.out.println("Updated string: "+str2);    } }OutputString: Orange is the new Black! Updated string: ... Read More