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Articles on Trending Technologies
Technical articles with clear explanations and examples
Program to print Sum Triangle of an array.
To generate a sum triangle of a given arrayGet the elements of the array from the user say, myArray[n].Create a two dimensional array say, result[n][n].Store the contents of the given array in the first row from bottom of the 2D array.result[n][i] = myArray[i].Now, from the second row of the 2D array fill elements such that ith element in each row is the sum of ith and (i+1)st elements of the previous row.result[i][j] = result[i+1][j] + result[i+1][j+1];Exampleimport java.util.Scanner; public class SumTriangleOfAnArray { public static void main(String args[]){ Scanner sc = new Scanner(System.in); System.out.println("Enter the ...
Read MoreProvider values() method in Java
The property values in the Provider can be viewed with an unmodifiable Collection view that is obtained using the method values() in the class java.security.Provider. This method requires no parameters and it returns an unmodifiable Collection view of the property values.A program that demonstrates this is given as follows −Exampleimport java.security.*; import java.util.*; public class Demo { public static void main(String[] argv) throws Exception { try { Signature sign = Signature.getInstance("DSA"); Provider p = sign.getProvider(); Collection val = p.values(); Iterator ...
Read MoreDoubleStream.Builder add() method in Java
The add() method of the DoubleStream.Builder class in Java adds an element to the stream being built. The method returns this builder.The syntax is as followsdefault DoubleStream.Builder add(double ele)Here, ele is the element to be added to this stream.To use the DoubleStream.Builder class in Java, import the following packageimport java.util.stream.DoubleStream; Create DoubleStream.Builder: DoubleStream.Builder builder = DoubleStream.builder(); Now add some elements: builder.add(23.5); builder.add(33.1); builder.add(35.6); builder.add(53.1);The following is an example to implement DoubleStream.Builder add() method in JavaExampleimport java.util.stream.DoubleStream; public class Demo { public static void main(String[] args) { DoubleStream.Builder builder = DoubleStream.builder(); builder.add(23.5); ...
Read MoreFind the size of a HashMap in Java
Use the size() method to get the size of HashMap. Let us first create a HashMapHashMap hm = new HashMap();Now, add some elements −hm.put("Bag", new Integer(1100)); hm.put("Sunglasses", new Integer(2000)); hm.put("Franes", new Integer(800)); hm.put("Wallet", new Integer(700)); hm.put("Belt", new Integer(600));Since, we added 5 elements above, therefore, the size() method will give 5 as the result −set.size()The following is an example to find the size of HashMap −Exampleimport java.util.*; public class Demo { public static void main(String args[]) { // Create a hash map HashMap hm = new ...
Read MoreCollectors partitioningBy() method in Java 8
The partioningBy() method returns a Collector that partitions the input elements according to a Predicate, and organizes them into a Map.The syntax is as follows.static Collector partitioningBy(Predicate
Read MoreProgram for printing array in Pendulum Arrangement.
To arrange elements of the array following pendulum arrangement.Sort the given array, create an empty array to store the result.Store the 0th element in a variable say temp.Store the element at index 1 in the sorted array in (mid+1)st position of the resultant array, and the next element int the (mid-1)st position and the next element in (mid+2)nd element and so on.Exampleimport java.util.Arrays; import java.util.Scanner; public class ArrayinPendulumArrangement { public static int[] swap(int origPos, int newPos, int[] array){ origPos = 1; newPos = 4; int temp = array[origPos]; ...
Read MoreDoubleStream.Builder build() method in Java
The build() method of the DoubleStream.Builder class builds the stream. It transitions this builder to the built state.The syntax is as followsDoubleStream build()To use the DoubleStream.Builder class in Java, import the following packageimport java.util.stream.DoubleStream;The following is an example to implement DoubleStream.Builder build() method in Java:Exampleimport java.util.stream.DoubleStream; public class Demo { public static void main(String[] args) { DoubleStream.Builder builder = DoubleStream.builder(); builder.add(34.5); builder.add(87.1); builder.add(35.6); builder.add(66.1); builder.add(36.8); builder.add(77.4); builder.add(88.2); builder.add(68.9); builder.build().forEach(System.out::println); } }Output34.5 87.1 35.6 66.1 36.8 77.4 88.2 68.9
Read MoreJava program to print a given matrix in Spiral Form.
Following is a Java program to print the spiral form of a given matrix.Examplepublic class PrintMatrixInSpiralForm { public static void main(String args[]){ int a[][]={{1,2,3},{4,5,6},{7,8,9}}; int w = 0; int x = a.length-1; int y = 0; int z = a[0].length-1; while(w
Read MoreCheck if a particular element exists in Java LinkedHashSet
Use the contains() method to check if a specific element exists in LinkedHashSet or not.Let us first create a LinkedHashSet and add some elements −LinkedHashSet l = new LinkedHashSet(); l.add(new String("1")); l.add(new String("2")); l.add(new String("3")); l.add(new String("4")); l.add(new String("5")); l.add(new String("6")); l.add(new String("7"));Now, check whether it contains element “5” or not −l.contains("5")The following is an example to check if a particular element exists in LinkedHashSet −Exampleimport java.util.*; public class Demo { public static void main(String[] args) { LinkedHashSet l = new LinkedHashSet(); l.add(new String("1")); l.add(new String("2")); l.add(new ...
Read MoreProgram to print a matrix in Diagonal Pattern.
Following is the Java program to print diagonal pattern of a given matrix.Examplepublic class DiagonalMatrix { public static void main(String args[]){ int a[][]={{1,2,3},{4,5,6},{7,8,9}}; int rows = a.length; int columns = a[0].length; for (int i = 0; i < rows; i++) { for (int r = i, c = 0; r >= 0 && c < columns; r--, c++){ System.out.print(a[r][c] + " "); } System.out.println(); } for (int i = 1; i < columns; i++) { for (int r = rows-1, c = i; r >= 0 && c < columns; r--, c++) { System.out.print(a[r][c] + " "); } System.out.println(); } } }Output1 4 2 7 5 3 8 6 9
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