Java Articles - Page 459 of 540

In Java, you cannot override static methods but you can overload them. Overloading a static method is allowed because the JVM determines which method to call at compile time based on the method signature, rather than the object's type. However, overriding is not allowed for static methods because an overridden method is called based on the object's type. In this article, we are going to discuss is it possible to overload and override a static method in Java. Also, we will understand static methods, method overloading and method overriding. What is a Static Method? A method defined using the static ... Read More

In case of having the operation of integer values in Java, we need to be aware of int underflow and overflow conditions. Considering the fact that in Java, The int data type is a 32-bit signed two's complement integer having a minimum value of -2, 147, 483, 648 and a maximum value of 2, 147, 483, 647. If a value goes beyond the max value possible, the value goes back to minimum value and continue from that minimum. In a similar way, it happens for a value less than the min value. Consider the following example.ExampleLive Demopublic class Tester { ... Read More

In case of having the operation of integer values in Java, we need to be aware of int underflow and overflow conditions. Considering the fact that in Java, The int data type is a 32-bit signed two's complement integer having a minimum value of -2, 147, 483, 648 and a maximum value of 2, 147, 483, 647. If a value goes beyond the max value possible, the value goes back to minimum value and continue from that minimum. In a similar way, it happens for a value less than the min value. Consider the following example.ExampleLive Demopublic class Tester { ... Read More

We can convert a stream to set using the following ways.Using stream.collect() with Collectors.toSet() method - Stream collect() method iterates its elements and stores them in a collection.collect(Collector.toSet()) method.Using set.add() method - Iterate stream using forEach and then add each element to the set.ExampleLive Demoimport java.util.*; import java.util.stream.Stream; import java.util.stream.Collectors;   public class Tester {            public static void main(String[] args) {       Stream stream = Stream.of("a", "b", "c", "d");       // Method 1       Set set = stream.collect(Collectors.toSet());       set.forEach(data -> System.out.print(data + " ")); ... Read More

We can convert a stream to set using the following ways.Using stream.collect() with Collectors.toSet() method - Stream collect() method iterates its elements and stores them in a collection.collect(Collector.toSet()) method.Using set.add() method - Iterate stream using forEach and then add each element to the set.ExampleLive Demoimport java.util.*; import java.util.stream.Stream; import java.util.stream.Collectors;   public class Tester {            public static void main(String[] args) {       Stream stream = Stream.of("a", "b", "c", "d");       // Method 1       Set set = stream.collect(Collectors.toSet());       set.forEach(data -> System.out.print(data + " ")); ... Read More

Being a type of Collection, we can convert a set to Stream using its stream() method.ExampleLive Demoimport java.util.HashSet; import java.util.Set; import java.util.stream.Stream; public class Tester {    public static void main(String args[]) {       Set set = new HashSet();       set.add("a");       set.add("b");       set.add("c");       set.add("d");       set.add("e");       set.add("f");       Stream stream = set.stream();       stream.forEach(data->System.out.print(data+" "));    }   }Outputa b c d e f

Being a type of Collection, we can convert a set to Stream using its stream() method.ExampleLive Demoimport java.util.HashSet; import java.util.Set; import java.util.stream.Stream; public class Tester {    public static void main(String args[]) {       Set set = new HashSet();       set.add("a");       set.add("b");       set.add("c");       set.add("d");       set.add("e");       set.add("f");       Stream stream = set.stream();       stream.forEach(data->System.out.print(data+" "));    }   }Outputa b c d e f

We can convert an array to arraylist using following ways.Using Arrays.asList() method - Pass the required array to this method and get a List object and pass it as a parameter to the constructor of the ArrayList class.Collections.addAll() method - Create a new list before using this method and then add array elements using this method to existing list.Iteration method - Create a new list. Iterate the array and add each element to the list.Example import java.util.ArrayList; import java.util.Arrays; import java.util.Collections; import java.util.List; public class Tester {    public static void main(String args[]) {       String[] array ... Read More

We can convert an array to arraylist using following ways.Using Arrays.asList() method - Pass the required array to this method and get a List object and pass it as a parameter to the constructor of the ArrayList class.Collections.addAll() method - Create a new list before using this method and then add array elements using this method to existing list.Iteration method - Create a new list. Iterate the array and add each element to the list.Example import java.util.ArrayList; import java.util.Arrays; import java.util.Collections; import java.util.List; public class Tester {    public static void main(String args[]) {       String[] array ... Read More

Let us look at a simple code first that will print the words Hello World.ExampleLive Demopublic class MyFirstJavaProgram {    /* This is my first java program.        * This will print 'Hello World' as the output        */    public static void main(String []args) {       System.out.println("Hello World"); // prints Hello World    } }Let's look at how to save the file, compile, and run the program. Please follow the subsequent steps −Open notepad and add the code as above.Save the file as: MyFirstJavaProgram.java.Open a command prompt window and go to ... Read More