The following is an example to create JCheckBox from text in Swing:Exampleimport java.awt.FlowLayout; import javax.swing.JCheckBox; import javax.swing.JFrame; import javax.swing.JLabel; public class SwingDemo {    public static void main(String[] args) {       JCheckBox checkBox1 = new JCheckBox("Cricket");       JCheckBox checkBox2 = new JCheckBox("Squash");       JCheckBox checkBox3 = new JCheckBox("Football");       checkBox3.setSelected(true);       JCheckBox checkBox4 = new JCheckBox("Hockey");       JCheckBox checkBox5 = new JCheckBox("Fencing");       JCheckBox checkBox6 = new JCheckBox("Tennis");       JFrame frame = new JFrame();       frame.setLayout(new FlowLayout());       frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);   ... Read More

The following is an example to change JButton font dynamically:Exampleimport java.awt.Font; import java.awt.event.ActionEvent; import java.awt.event.ActionListener; import javax.swing.JButton; import javax.swing.JFrame; public class SwingDemo extends JFrame {    JButton button = new JButton("Change");    int fontSize = 10;    public SwingDemo() {       setSize(500, 400);       setDefaultCloseOperation(EXIT_ON_CLOSE);       add(button);       // changing font size dynamically on button click       button.addActionListener(new ActionListener() {          public void actionPerformed(ActionEvent ev) {             button.setFont(new Font("Dialog", Font.PLAIN, ++fontSize));             button.revalidate();          }       });       setVisible(true);    }    public static void main(String[] args) {       new SwingDemo();    } }OutputClick “Change” button above to change the font:

Let us first set a JButton:JButton btn = new JButton("DemoButton");Now, attach action listener:btn.addActionListener(new ClickListener());If you have an ActionListener attached to your button it'll fire when you call the method doClick():btn.doClick();The following is an example to call JButton doClick() method to simulate a click action:Exampleimport java.awt.event.ActionEvent; import java.awt.event.ActionListener; import javax.swing.JButton; import javax.swing.JOptionPane; public class SwingDemo {    public static void main(final String args[]) {       JButton btn = new JButton("DemoButton");       btn.addActionListener(new ClickListener());       JOptionPane.showMessageDialog(null, btn);       btn.doClick();    } } class ClickListener implements ActionListener {    public void actionPerformed(ActionEvent e) {   ... Read More

With set action command, here we are displaying a message in the console on the click of a button.Set the button first:JButton btn = new JButton("Demo Button");Now, set Action Listener to fire when the button is clicked:ActionListener actionListener = new ActionListener() {    public void actionPerformed(ActionEvent event) {       String str = event.getActionCommand();       System.out.println("Clicked = " + str);    } };The following is an example to set action command to JButton:Exampleimport java.awt.event.ActionEvent; import java.awt.event.ActionListener; import javax.swing.JButton; import javax.swing.JOptionPane; public class SwingDemo {    public static void main(final String args[]) {       JButton btn ... Read More

For Button border, use createLineBorder() method in Java, which allows you to set the color of the Border as well:JButton button = new JButton("Demo Button!"); Border border = BorderFactory.createLineBorder(Color.BLUE);The following is an example to change button border in Java:Exampleimport java.awt.BorderLayout; import java.awt.Color; import java.awt.Container; import javax.swing.BorderFactory; import javax.swing.JButton; import javax.swing.JFrame; import javax.swing.border.Border; public class SwingDemo {    public static void main(String args[]) {       JFrame frame = new JFrame("Button Border");       Container container = frame.getContentPane();       JButton button = new JButton("Demo Button!");       Border border = BorderFactory.createLineBorder(Color.BLUE);       button.setBorder(border);   ... Read More

The following is an example to add action listener to Button:Examplepackage my; import java.awt.*; import java.awt.event.*; import javax.swing.*; public class SwingDemo {    private JFrame frame;    private JLabel headerLabel;    private JLabel statusLabel;    private JPanel controlPanel;    public SwingDemo(){       prepareGUI();    }    public static void main(String[] args){       SwingDemo swingControlDemo = new SwingDemo();       swingControlDemo.showButtonDemo();    }    private void prepareGUI(){       frame = new JFrame("Java Swing");       frame.setSize(500, 500);       frame.setLayout(new GridLayout(3, 1));       frame.addWindowListener(new WindowAdapter() {         ... Read More

Yes, we can get the supported image types with ImageIO class in Java. The following is an example to get supported image types in Java:Examplepackage my; import javax.imageio.ImageIO; public class SwingDemo {    public static void main(String[] args) throws Exception {       String[] imgTypes = ImageIO.getReaderFileSuffixes();       System.out.print("Supported Image Types = ");       for (String type : imgTypes) {          System.out.print("" + type);       }    } }OutputSupported Image Types = jpg tif tiff bmp gif png wbmp jpeg

This is a C++ program to repeatedly search the same text.AlgorithmsBegin    Take the original string and pattern to be searched as input.    org_len = store the length of original string    pat_len = store the length of pattern    for i = 0 to (org_len - pat_len)       for j = 0 to pat_len - 1          if (org[i + j] != patt[j])             if (j == pat_len)                Increase m.       Print the position at which the pattern is ... Read More

The N-Queens problem is a puzzle where we need to place N queens on an N x N chessboard such that no two queens attack each other. A queen will attack another queen if they are in the same row, column, or diagonal. In this problem, you are given a value of N, and you need find possible arrangements for N queens on N x N chessboard. For example, Consider that we have a chessboard of size 4 x 4. In this case, we can place maximum 4 queens on the chessboard such that no two queens attack ... Read More

In this problem, you are given three coordinates in a 2D plane, and you need to check if these three points are collinear, meaning they lie on a single straight line. There are two approaches to solve this problem. In this article, we will explain both the approaches with example code in C++. // Input: Coordinates of three points points = {{2, 3}, {4, 6}, {6, 9}}; // Output The points are collinear. Check if Three Points are Collinear If three points lie on a single line, then the points are called as collinear points. ... Read More