Java Articles - Page 548 of 745

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 static T max(Collection c)where c is the collection object whose maximum is to be found.Let us see a program to find the maximum element of ArrayList with Java collections −Example Live Demoimport java.util.*; public class Example {    public static void main (String[] args) {       List list ... Read More

In order to get a copy of a TimeZone object in Java, we use the clone() method. The clone() method creates of a copy of the TimeZone.Declaration −The java.util.TimeZone.clone() method is declared as follows −public Object clone()Let us see a Java program which creates a copy of the TimeZone object using the clone() method −Example Live Demoimport java.util.*; public class Example {    public static void main( String args[] ) {       // creating object of TimeZone       TimeZone obj = TimeZone.getDefault();       System.out.println("Initial object: " + obj);       // copying the TimeZone ... Read More

In order to generate Random boolean in Java, we use the nextBoolean() method of the java.util.Random class. This returns the next random boolean value from the random generator sequence.Declaration −The java.util.Random.nextBoolean() method is declared as follows −public boolean nextBoolean()Let us see a program to generate random boolean in Java −Example Live Demoimport java.util.Random; public class Example {    public static void main(String[] args) {       Random rd = new Random(); // creating Random object       System.out.println(rd.nextBoolean()); // displaying a random boolean    } }OutputtrueNote − The output might vary on Online Compilers.

To get the elapsed time of an operation in days 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 (UTC or epoch time).Let us see a program to compute the elapsed time of an operation in days in Java −Example Live Demopublic class Example {    public static void main(String[] args) throws Exception {       // finding the time before the operation is executed       long ... 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 (UTC or epoch time).Let us see a program to compute the elapsed time of an operation in hours in Java −Example Live Demopublic class Example {    public static void main(String[] args) throws Exception {       // finding the time before the operation is executed       long ... Read More

To get the elapsed time of an operation in minutes 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 (UTC or epoch time).Let us see a program to compute the elapsed time of an operation in minutes in Java −Example Live Demopublic class Example {    public static void main(String[] args) throws Exception {       // finding the time before the operation is executed       long ... Read More

To compute the elapsed time of an operation 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 (UTC or epoch time).Let us see a program to compute the elapsed time of an operation in Java −Example Live Demopublic class Example {    public static void main(String[] args) throws Exception {       // finding the time before the operation is executed       long start = System.currentTimeMillis();   ... Read More

To compute the elapsed time of an operation in seconds 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 (UTC or epoch time).Let us see a program to compute the elapsed time of an operation in Java −Example Live Demopublic class Example {    public static void main(String[] args) throws Exception {       // finding the time before the operation is executed       long start = ... 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() method is given as follows −Example Live Demoimport java.util.Arrays; public class Demo {    public static void main(String[] argv) throws Exception {       boolean flag = Arrays.equals(new int[] { 45, 12, 90 }, new int[] { 45, 12, 90 });       System.out.println("The two int arrays are equal? ... Read More

The java.util.TimerTask.run() method looks onto the action to be performed by the task. It is used to carry out the action performed by the task.Declaration −The java.util.TimerTask.run() method is declared as follows −public abstract void run()Let us see an example program to call the run() method of the Timer Task −Example Live Demoimport java.util.*; class MyTask extends TimerTask {    public void run() {       System.out.println("Running");    } } public class Example {    public static void main(String[] args) {       // creating timer task, timer       TimerTask task = new MyTask();       ... Read More