The Timer Class in Java is a facility for threads to plan tasks for future execution in a background thread. Tasks may be executed a single time or multiple times. The Timer class is thread-safe i.e. the threads of the class do not require external synchronization and can share a ... Read More

One of the methods in the Timer class is the void schedule(TimerTask task, Date firstTime, long period) method. This method schedules tasks for repeated fixed-delay execution, beginning at the specified time.In fixed-delay execution, each execution is scheduled with respect to the original execution time of the preceding execution. If an ... Read More

Two int arrays can be compared in Java using the java.util.Arrays.equals() method. This method returns true if the arrays are equal and false otherwise. The two arrays are equal if they contain the same number of elements in the same order.A program that compares two int arrays using the Arrays.equals() ... Read More

To get the elapsed time of an operation in hours in Java, we use the System.currentTimeMillis() method. The java.lang.System.currentTimeMillis() returns the current time in milliseconds.Declaration −The java.lang.System.currentTimeMillis() is declared as follows −public static long currentTimeMillis()The method returns time difference in milliseconds between the current time and midnight, January 1, 1970 ... Read More

In order to compute maximum element of ArrayList with Java Collections, we use the Collections.max() method. The java.util.Collections.max() returns the maximum element of the given collection. All elements must be mutually comparable and implement the comparable interface. They shouldn’t throw a ClassCastException.Declaration −The Collections.max() method is declared as follows −public ... Read More

In order to get the ID of this timezone in Java, we use the getDisplayName() method. The getDisplayName() returns a name of this time zone acceptable for display to the user in the default locale. In other words, the name returned by the getDisplayName() is user friendly.Declaration − The java.util.TimeZone.getDisplayName() ... Read More

x++ automatically handles the type casting where as x= x + 1 needs typecasting in case of x is not an int variable. See the example below.Example Live Demopublic class Tester {    public static void main(String args[]) {       byte b = 2;       //Type casting ... Read More

A stack and a heap are used for memory allocation in Java. However, the stack is used for primitive data types, temporary variables, object addresses etc. The heap is used for storing objects in memory.Stacks and heaps in Java are explained in more detail as follows −Stack in JavaStacks are ... Read More

Method overloading is a type of static polymorphism. In Method overloading, we can define multiple methods with the same name but with different parameters. Consider the following example program.Example Live Demopublic class Tester {    public static void main(String args[]) {       Tester tester = new Tester();     ... Read More

A helper class serve the following purposes.Provides common methods which are required by multiple classes in the project.Helper methods are generally public and static so that these can be invoked independently.Each methods of a helper class should work independent of other methods of same class.Following example showcases one such helper ... Read More