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Programming Articles
Page 2446 of 2547
How to create a Borderless Window in Java?
To create a borderless window in Java, do not decorate the window. The following is an example to create a BorderLess Window −Examplepackage my; import java.awt.GraphicsEnvironment; import java.awt.GridLayout; import java.awt.Point; import javax.swing.JLabel; import javax.swing.JPasswordField; import javax.swing.JTextField; import javax.swing.JWindow; import javax.swing.SwingConstants; public class SwingDemo { public static void main(String[] args) throws Exception { JWindow frame = new JWindow(); JLabel label1, label2, label3; frame.setLayout(new GridLayout(2, 2)); label1 = new JLabel("Id", SwingConstants.CENTER); label2 = new JLabel("Age", SwingConstants.CENTER); label3 = new JLabel("Password", SwingConstants.CENTER); ...
Read MoreJava ResultSetMetaData getColumnTypeName() method with example
The getColumnTypeName() method of the ResultSetMetaData (interface) retrieves and returns the name of the datatype of the specified column in the current ResultSet object.This method accepts an integer value representing the index of a column and, returns a String value representing the name of the SQL data type of the specified column.To get the ResultSetMetaData object, you need to −Register the Driver: Select the required database register the Driver class of the particular database using the registerDriver() method of the DriverManager class or, the forName() method of the class named Class.DriverManager.registerDriver(new com.mysql.jdbc.Driver());Get connection: Create a connection object by passing the URL ...
Read MoreC++ Program to Implement Treap
This is a C++ program to implement Treap. Treap data structure is basically a randomized binary search tree. Here, we shall consider insert, delete and search operations on this.Functions and descriptionsfunction rotLeft() for left rotationFirst rotate the tree then set new root.function rotRight() for right rotationFirst rotate the tree then set new root.function insetNod() to insert a given key into treap with priority recursively −If root = nullptr return data as root. If given data is less then root node, Insert data in left subtree. Rotate left if heap property violated. else Insert data in right ...
Read MoreC++ program to convert time from 12 hour to 24 hour format
This is a C++ program to convert time from 12 hour to 24 hour format.AlgorithmBegin In main(), If median = pm Check if entered hours is less than 12 Then add 12 to hours and print the time in 24 hours format. Check if entered hours is equal to 12 Then print “00” as hours and print the time in 24 hours format. Else If median=am Check if entered hours is less than 12 Then print ...
Read MoreC++ program to print Happy Birthday
This is a C++ program to print Happy Birthday.AlgorithmBegin Take a str1 which takes the next character of our desired ouput like for H it will be G. Assign the string to a pointer p. Make a while loop till *p != NULL. Go next character of the string print it and after that go the nextposition of string. Print the result. EndExample#include using namespace std; main(){ char str[]="G`ooxAhqsgc`x",*p; p=str; while(*p!='\0') ++*p++; cout
Read MoreHow to create a JLabel with an image icon in Java?
Let us create a label with image icon −JLabel label = new JLabel("SUBJECT "); label.setIcon(new ImageIcon("E:ew.png"));Now, create another component −JTextArea text = new JTextArea(); text.setText("Add subject here...");Align the components with GridBagLayout −panel.setLayout(new GridBagLayout());The following is an example to center a label with an image icon −Examplepackage my; import java.awt.GridBagLayout; import javax.swing.BorderFactory; import javax.swing.ImageIcon; import javax.swing.JFrame; import javax.swing.JLabel; import javax.swing.JPanel; import javax.swing.JTextArea; import javax.swing.WindowConstants; public class SwingDemo { public static void main(String[] args) { JFrame frame = new JFrame("Demo Frame"); JPanel panel = new JPanel(); JLabel label = new JLabel("SUBJECT "); ...
Read MoreJava Program to retrieve a Stream from a List
Let us first create a List:List list = Arrays.asList(25, 50, 100, 200, 250, 300, 400, 500);Now, create a stream from the List:Stream stream = list.stream(); Arrays.toString(stream.toArray()));The following is an example to retrieve a Stream from a ListExampleimport java.util.Arrays; import java.util.List; import java.util.stream.Stream; public class Demo { public static void main(String[] args) { List list = Arrays.asList(25, 50, 100, 200, 250, 300, 400, 500); System.out.println("List elements..."); for (int res : list) { System.out.println(res); } Stream stream = list.stream(); System.out.println("Stream = "+Arrays.toString(stream.toArray())); } }OutputList elements... 25 50 100 200 250 300 400 500 Stream = [25, 50, 100, 200, 250, 300, 400, 500]
Read MoreC++ Program to Perform Sorting Using B-Tree
Here we will see how to get the sorted sequence using B-Tree. The B-tree is n-ary tree. To get the sorted sequences, we can create a B-tree, then add the numbers into it. Here the B-tree can hold maximum 5 nodes. If number of nodes increases, split the node and form new level. As the nodes are holding few number of elements like 5 (at most), we are using Bubble sorting techniques to sort them. as the number of elements is very low, then it will not affect too much on its performance.After traversing the tree, we will get all ...
Read MoreHow to get this nodes's parent in a JTree with Java?
Let’s say we want the parent of a node, then use the getParent() method -node3.getFirstChild()You can also get the parent of child node. Here, “nine” is the child node −nine.getParent()The output is as follows displaying this node’s parent on Console −Examplepackage my; import javax.swing.JFrame; import javax.swing.JTree; import javax.swing.tree.DefaultMutableTreeNode; public class SwingDemo { public static void main(String[] args) throws Exception { JFrame frame = new JFrame("Demo"); DefaultMutableTreeNode node = new DefaultMutableTreeNode("Products"); DefaultMutableTreeNode node1 = new DefaultMutableTreeNode("Clothing (Product1 - P66778)"); DefaultMutableTreeNode node2 = new DefaultMutableTreeNode("Accessories (Product2 - P66779)"); ...
Read MoreJava Program to convert Stream to List
Declare and initialize an Integer array:Integer[] arr = {50, 100, 150, 200, 300, 400, 500, 600, 700, 800, 1000};Now, create a stream with the above elements:Stream stream = Arrays.stream(arr);To convert the above stream to list, use Collectors.toList():stream.collect(Collectors.toList()The following is an example to convert Stream to List:Exampleimport java.util.Arrays; import java.util.stream.Collectors; import java.util.stream.Stream; public class Demo { public static void main(String[] args) { Integer[] arr = {50, 100, 150, 200, 300, 400, 500, 600, 700, 800, 1000}; Stream stream = Arrays.stream(arr); System.out.println("Stream = "+stream.collect(Collectors.toList())); } }OutputStream = [50, 100, 150, 200, 300, 400, 500, 600, 700, 800, 1000]
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