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Articles on Trending Technologies
Technical articles with clear explanations and examples
If a number is read as a String, how to Count the no of times the highest number repeated in the string?n a. Ex: 2 4 3 4 2 4 0 -> (3)
To do so, Trim the given string and split it using the split() method (Removing the empty spaces in-between).Create an integer array and in loop convert each element of the string array to an integer using Integer.parseInt() method and assign it to the respective element of the integer array.Sort the obtained integer array, since this method sorts the elements of the array in ascending order the last element will be the maximum of the array. Create an integer variable count with initial value 0. Compare each element of the array with the maximum value, each time a match occurs increment the count. The final value ...
Read MoreHow to store the contents of arrays in a file using Java?
You can use write data into a file using the Writer classes. In the example given below, we are writing the contents of the array using the BufferedWriter.Exampleimport java.io.BufferedWriter; import java.io.FileWriter; public class WritingStringArrayToFile { public static void main(String args[]) throws Exception { String[] myArray = {"JavaFX", "HBase", "OpenCV", "Java", "Hadoop", "Neo4j"}; BufferedWriter writer = new BufferedWriter(new FileWriter("myFile.txt", false)); for(int i = 0; i < myArray.length; i++) { writer.write(myArray[i].toString()); writer.newLine(); } writer.flush(); ...
Read MoreHow to convert Java Array to Iterable?
To make an array iterable either you need to convert it to a stream or as a list using the asList() or stream() methods respectively. Then you can get an iterator for these objects using the iterator() method.Exampleimport java.util.Arrays; import java.util.Iterator; public class ArrayToIterable { public static void main(String args[]){ Integer[] myArray = {897, 56, 78, 90, 12, 123, 75}; Iterator iterator = Arrays.stream(myArray).iterator(); while(iterator.hasNext()) { System.out.println(iterator.next()); } } }Output897 56 78 90 12 123 75As mentioned above, you can also convert an ...
Read MoreHow do I write interface names in Java?
While writing an interface/class names you need to keep the following points in mind. First letter of the interface/class name should be capital and remaining letters should be small (mixed case). interface Sample Likewise, first letter of each word in the name should be capital an remaining letters should be small. interface MYInterface Keeping interface names simple and descriptive is suggestable. Better not to use acronyms while writing interface/class names. Example interface MyInterface { void sample(); void demo(); } public class Test ...
Read MoreHow do I write constants names in Java?
While writing the name of the constants it is suggested to write all the letters in upper case. If constant contains more than one word they should be separated by underscore (_). Example public class ConstantsTest { public static final int MIN_VALUE = 22; public static final int MAX_VALUE = 222; public static void main(String args[]) { System.out.println("Value of the constant MIN_VALUE: "+MIN_VALUE); System.out.println("Value of the constant MAX_VALUE: "+MAX_VALUE); } } Output Value of the constant MIN_VALUE: 22 Value of the constant MAX_VALUE: 222
Read MoreHow to find the intersection of two arrays in java?
To find the intersection of two arrays in java use two loops. The outer loop is to iterate the elements of the first array whereas, the second loop is to iterate the elements of the second array. Within the second loop compare the elements of the two arrays:Examplepublic class IntersectionOfTwoArrays { public static void main(String args[]) { int myArray1[] = {23, 36, 96, 78, 55}; int myArray2[] = {78, 45, 19, 73, 55}; System.out.println("Intersection of the two arrays ::"); for(int i = 0; i
Read MoreWhat is the difference between method overloading and method hiding in Java?
method hiding − When super class and the sub class contains same methods including parameters, and if they are static and, when called, the super class method is hidden by the method of the sub class this is known as method hiding. Example class Demo{ public static void demoMethod() { System.out.println("method of super class"); } } public class Sample extends Demo{ public static void demoMethod() { System.out.println("method of sub class"); } public ...
Read MoreWhat is the difference between compile time polymorphism and runtime polymorphism in java?
If we perform (achieve) method overriding and method overloading using instance methods, it is run time (dynamic) polymorphism. In dynamic polymorphism the binding between the method call an the method body happens at the time of execution and, this binding is known as dynamic binding or late binding. Example class SuperClass{ public static void sample(){ System.out.println("Method of the super class"); } } public class RuntimePolymorphism extends SuperClass { public static void sample(){ System.out.println("Method of the sub class"); ...
Read MoreSingle dimensional array in Java
Following is a simple example of a single dimensional array.Examplepublic class Tester { public static void main(String[] args) { double[] myList = {1.9, 2.9, 3.4, 3.5}; // Print all the array elements for (double element: myList) { System.out.print(element + " "); } } }Output1.9 2.9 3.4 3.5
Read MoreWhat is Is-a relationship in Java?
IS-A is a way of saying: This object is a type of that object. Let us see how the extends keyword is used to achieve inheritance.Examplepublic class Animal { } public class Mammal extends Animal { } public class Reptile extends Animal { } public class Dog extends Mammal { }Now, based on the above example, in Object-Oriented terms, the following are true −Animal is the superclass of Mammal class.Animal is the superclass of Reptile class.Mammal and Reptile are subclasses of Animal class.Dog is the subclass of both Mammal and Animal classes.Exampleclass Animal { } class Mammal extends Animal { ...
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