jframe

I have two JFrame . public class Main extends JFrame public class ColourOption extends JPanel implements ActionListener which is then set up in a JFrame. I wanted to open the second JFrame when i click on button of first JFrame .setVisible() is not working. I also tried revalidate() , as well as invalidate() , validate() in the second JFrame. What could be the reason for it to not work? You will have to instantiate the 2nd class which has the 2nd Frame(to be shown)..and then if you call the setVisible(true) .. then it must show .. what you doing .. could you provide your button's event handler

I've got a beginner question here that I was hoping someone with some Java experience could help me with. Currently taking an intro to OOP course focused on Java. My instructor is currently covering awt and swing, specifically the need to override the paint method so that graphics are redrawn when a window is resized, etc. I like to do as much outside reading as possible, and my concern is that the examples that my professor gives involve things that I've read are not best practices. To get to the point... I understand that it's necessary to override the paint method, but I don't know the best

I made an undecorated Java program. I work on a dual monitor. But when i try to move the program on the second monitor, it doesn't works.. Here is a screenshot explanation So i have 2 Classes: Class Main.java : package undecorated; import java.awt.CardLayout; import java.awt.Container; import java.awt.Dimension; import java.awt.event.ActionEvent; import java.awt.event.ActionListener; import java.awt.event.MouseEvent; import java.awt.event.MouseListener; import java.sql.SQLException; import javax.swing.ImageIcon; import javax.swing.JButton; import javax.swing.JFrame; import javax.swing.JLabel;

The following program's goal is to ask the user to input a resistor value, then of which the program will output the corresponding colors for each digit. This thus not include all the digits. However, that program is done, I've made an attempt to incorporate JFrame as an extra thing, except I am hung up on how to print the corresponding colors in the action listener. This line calls the specific methods, for the 3 digits then proceeds to print the colors, except how do I incorporate that and the rest of my code into my JFrame, and or ActionListener. The line System.out.println(array3[i]);/ I

I have a simple Atari breakout program, and long story short, one of my powerups is to allow the user to resize the window for a few seconds, then make the window non-resizable again.Everything works fine, and the window goes from being not-resizable, to being resizable for a few seconds. What's supposed to happen, is after the few seconds are up, the window should stop accepting input for resizing the window (IE: should not be resizable). The only problem, is that whenever it's supposed to be set to non-resizable, if you keep your cursor dragging on the window to resize it, it keeps resizing.

This question already has an answer here: Why does the first panel added to a frame disappear? 2 answers public class Board extends JFrame { public void bd() { JFrame frame=new JFrame(); JLabel background1 = new JLabel(new ImageIcon("background.png")); JLabel knight=new JLabel(new ImageIcon("knight.jpg")); frame.add(background1); frame.add(knight); frame.pack(); frame.setResizable(false); frame.setVisible(true); } } I've been having some trouble with my code when i add the knight image the background image will disappear and only the knight image appears. How would i make the images overlap or