Programming Articles - Page 2580 of 3363

At first, set the setShowGrid() to FALSE to disable all the grid lines. To display only horizontal grid lines in a table, set the method setShowHorizontalLines() to TRUE. Let us first create a table with rows and columns −String[][] rec = {    { "1", "Steve", "AUS" },    { "2", "Virat", "IND" },    { "3", "Kane", "NZ" },    { "4", "David", "AUS" },    { "5", "Ben", "ENG" },    { "6", "Eion", "ENG" }, }; String[] header = { "Rank", "Player", "Country" }; JTable table = new JTable(rec, header);Now, display only horizontal grid lines −table.setShowGrid(false); table.setShowHorizontalLines(true);The following ... Read More

At first, set the setShowGrid() to FALSE to disable all the grid lines. To display only vertical grid lines in a table, set the method setShowVerticalLines() to TRUE. Let us first create a table with rows and columns −String[][] rec = {    { "1", "Steve", "AUS" },    { "2", "Virat", "IND" },    { "3", "Kane", "NZ" },    { "4", "David", "AUS" },    { "5", "Ben", "ENG" },    { "6", "Eion", "ENG" }, }; String[] header = { "Rank", "Player", "Country" }; JTable table = new JTable(rec, header);Now, display only vertical grid lines −table.setShowGrid(false); table.setShowVerticalLines(true);The ... Read More

Let’s say the following is our table −String[][] rec = {    { "1", "Steve", "AUS" },    { "2", "Virat", "IND" },    { "3", "Kane", "NZ" },    { "4", "David", "AUS" },    { "5", "Ben", "ENG" },    { "6", "Eion", "ENG" }, }; String[] header = { "Rank", "Player", "Country" }; JTable table = new JTable(rec, header);Prevent displaying grid lines −table.setShowGrid(false);The following is an example to prevent displaying grid lines −Examplepackage my; import java.awt.Color; import javax.swing.BorderFactory; import javax.swing.JFrame; import javax.swing.JPanel; import javax.swing.JScrollPane; import javax.swing.JTable; import javax.swing.border.TitledBorder; public class SwingDemo {    public static void main(String[] ... Read More

To expand JTree row to display all the nodes and child nodes, use the expandRow() method in Java. At first, create a node −DefaultMutableTreeNode node = new DefaultMutableTreeNode("Project");Now, add nodes to the node created above −DefaultMutableTreeNode node1 = new DefaultMutableTreeNode("App"); DefaultMutableTreeNode node2 = new DefaultMutableTreeNode("Website"); DefaultMutableTreeNode node3 = new DefaultMutableTreeNode("WebApp"); node.add(node1); node.add(node2); node.add(node3);Now, create more nodes and set them as child nodes for the nodes we creted above −DefaultMutableTreeNode one = new DefaultMutableTreeNode("Learning website"); DefaultMutableTreeNode two = new DefaultMutableTreeNode("Business website"); DefaultMutableTreeNode three = new DefaultMutableTreeNode("News publishing website"); DefaultMutableTreeNode four = new DefaultMutableTreeNode("Android app"); DefaultMutableTreeNode five = new DefaultMutableTreeNode("iOS app"); DefaultMutableTreeNode ... Read More

To create a Titleless and Borderless JFrame, use the setUndecorated() method and set it to TRUE −JFrame frame = new JFrame("Register!"); frame.setUndecorated(true);The following is an example to create a titleless and borderless JFrame −Examplepackage my; import java.awt.GridLayout; import javax.swing.JFrame; import javax.swing.JLabel; import javax.swing.JPasswordField; import javax.swing.JTextField; import javax.swing.SwingConstants; public class SwingDemo {    public static void main(String[] args) throws Exception {       JFrame frame = new JFrame("Register!");       JLabel label1, label2, label3;       frame.setLayout(new GridLayout(2, 2));       label1 = new JLabel("Id", SwingConstants.CENTER);       label2 = new JLabel("Age", SwingConstants.CENTER);       ... Read More

Differences between Map and WeakMapThe functional mechanism of Map and WeakMap is same but they have little differences.1) A WeakMap accepts only objects as keys whereas a Map, in addition to objects, accepts primitive datatype such as strings, numbers etc.2) WeakMap objects doesn't avert garbage collection if there are no references to the object which is acting like a key. Therefore there is no method to retrieve keys in WeakMap, whereas in Map there are methods such as Map.prototype.keys() to get the keys.3) There is no size property exists in WeakMap.MapIt is used to associate a key to a value ... Read More

A static variable gets created at the time of class loading even before the execution of a static block and the purpose of the static block is to assign value to the static variables. A static variable stores a value that is shared between all instances of the class it is defined in and a static block is a section of code that gets executed when class is first loaded. If we want any logic that needs to be executed at the time of class loading that logic needs to place inside the static block so that it will be executed ... Read More

In PHP, instance methods are the preferable practice over static methods. In any case, it isn't to say that static methods are not helpful, they have a distinct and unique purpose. Here we discuss a comparison between static and instance methods in PHP.Here Note that instance method is always connected to the object of the class while on the other hand static methods always connected with the class.First talk about static method. The static method in PHP is the same as other Object Oriented Programming Languages. Important cases for using the static method in PHP.The static method required to be ... Read More

In PHP, testing floating point values for equality is problematic, because PHP is failing when checking if one floating point number is equal to another. Despite the fact floating point numbers seems to have the same value do not need to actually be identical. So in this article will demonstrate the problem we are facing in comparison of Floating-Point Numbers and different procedures to avoid this problem.ExampleLet's test this with a simple example:output:a and b are not same.Explanation:In this code, the else condition is executed instead of the if condition, even though $a and $b are the same. It is ... Read More

The error that occurs at runtime after successful compilation of the Java program is called a runtime error or unchecked exception. It disrupts the normal flow of a program’s execution and terminates the program abruptly.These errors are not detected by the compiler but by JVM. The runtime errors in Java are represented by a class called RuntimeException. In this article, we are going to learn what RuntimeException is and its common types. Also, we will discuss how to handle RuntimeException in Java. What is RuntimeException in Java? In Java, the RuntimeException of the java.lang package is a parent class of ... Read More