import javax.xml.datatype.DatatypeConfigurationException; import javax.xml.datatype.DatatypeFactory; import javax.xml.datatype.XMLGregorianCalendar; class GFG { public static void main(String[] args) { Date today = new Date(); // Converting date to XMLGregorianCalendar XMLGregorianCalendar xml = ...
Genericsmeansparameterized types. The idea is to allow type (Integer, String, … etc., and user-defined types) to be a parameter to methods, classes, and interfaces. Using Generics, it is possible to create classes that work with different data types. An entity such as class, interface, o...
Example 1: The following codes are included in the text: 1.// Java Program to convert double value to String value2.3.classandGFG {4.5.and// Function to convert double value to String value6.,public,static, andString7.,convertDoubleToString(,double, anddoubleValue)8.and{9.10.and// Conver...
Java // Java Program to illustratevalues() Method// of TreeMap class// Importing required classesimportjava.util.*;// Main classpublicclassGFG{// Main driver methodpublicstaticvoidmain(String[] args){// Creating an empty TreeMap by// declaring object of integer, string pairsTreeMap<Integer,...
// Java Program to illustrateget() method// of LinkedHashMap// Mapping String Values to Integer Keys// Importing required classesimportjava.util.*;// Main classpublicclassGFG{// Main driver methodpublicstaticvoidmain(String[] args){// Creating an empty HashMapLinkedHashMap<Integer, String> ...
// A Java program to demonstrate that invoking a method// on null causes NullPointerExceptionimport java.io.*;class GFG{ public static void main (String[] args) { // Initializing String variable with null value String ptr = null; // Checking if ptr.equals null or works fine. try { /...
// A Java program to demonstrate that invoking a method // on null causes NullPointerException import java.io.*; class GFG { public static void main (String[] args) { // Initializing String variable with null value String ptr = null; // Checking if ptr.equals null or works fine. try...
Here are the codes: 1.// Java code to show the implementation of2.// keySet() method3.4.import5.java.util.*;6.public7.class8.GfG {9.10.11.// Main method12.13.public14.static15.void16.main(String[] args)17.18.{19.20.21.// Create a properties and add some values22.23.Properties pro...
importjava.util.*;importjava.util.stream.Collectors;classGFG{publicstaticvoidmain(String[] args){ System.out.println("The stream after converting from lowercase to uppercase is: ");// Creating a list of IntegersList<String> l = Arrays.asList("this","is","an","example","of","java","...
Java // Java code to illustrate the clone() method by// Mapping Integer Values to String Keys// Importing utility classesimportjava.util.*;// Main classpublicclassGFG{// Main driver methodpublicstaticvoidmain(String[]args){// Creating an empty HashMap// Declaring objects of type integer and...