How to add a button to a JFrame Gui

How to add a button to a JFrame Gui

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I'm trying to add a button to a frame gui. i tried making a panel and adding it to that, but it does not work. please help!

here is my code:

import javax.swing.*;

public class Agui extends JFrame {
    public Agui() {
        setTitle("My Gui");
        setSize(400, 400);
        setVisible(true);
        setDefaultCloseOperation(EXIT_ON_CLOSE);

        JButton button;
        JPanel panel;

        // my error lines are under the "panel" and  "button"
        // it says i must implement the variables. what does that mean???
        panel.add(button);
    }
    public static void main(String[] args) {
        Agui a = new Agui();
    }
}

How to add a button to a JFrame Gui, Example Code: import javax.swing.*; public class Agui extends JFrame { public Agui() { setTitle("My Gui"); setSize(400, 400); // Create JButton  1. (1-) Don't use a null layout. Swing was designed to be used with layout managers. You should add the button to the contentPane, not the JFrame. - you can add the button to the frame. The add () method of the frame will forward the component to the content pane of the frame.


Change:

JButton button;
JPanel panel;

to:

JButton button = new JButton();
JPanel panel = new JPanel();

You can also pass a String value in JButton() constructor for that string value to be shown on the JButton.

Example: JButton button = new JButton("I am a JButton");

Interact with JFrame – buttons, listeners and text fields, JButton calss provides us a way to add buttons and events happens after button click. Similarly with the help of javax.swing.JTextfield allow us to  Similarly you can add buttons to your JFrame. JButton provides us an easy way to add buttons and action listeners. It has many constructors like. JButton(); creates a button with no text and no icon. JButton(String text): creates a button with specified text. JButton(Icon icon); creates a button with specified icon.


If you can Change this Program, You can adjust the button place also

import java.awt.*;

import javax.swing.*;

import java.awt.event.*;



public class agui extends JFrame

{

agui()
{
    setTitle("My GUI");
    setSize(400,400);
    setLayout(null);

    JButton button = new JButton("Click Here..!");
    button.setBounds(50,100,100,50); /*Distance from left,           
                      Distance from top,length of button, height of button*/
    add(button);

    setVisible(true);

}

public static void main(String[] args)
{

     JFrame agui = new agui();



}

}

Output

Swing - JButton tutorial and examples, In this tutorial we will learn how to create a button in Swing. we would be adding our button */ JFrame frame=new JFrame(); // Creating Button JButton b=​new  Use child.setLocation (0, 0) on the button, and parent.setLayout (null). Instead of using setBounds () on the JFrame to size it, consider using just setSize () and letting the OS position the frame. The Java tutorial recommends setBounds. setLocation just delegates to setBounds anyway.


Adding Functionality to Buttons: A Beginners Guide, You use the Palette to drag and drop UI components to the design area. Start by selecting a JPanel from the Palette and drop it onto the JFrame. While the JPanel​  Create a button with only an icon in the file system: 1 JButton button = new JButton (new ImageIcon ("images/start.gif")); Here the icon file start.gif is placed under images directory which is relative to the program.


Java Tutorial- Simple JFrame with a button, The JButton class is used to create a labeled button that has platform JFrame f​=new JFrame("Button Example");; JButton b=new JButton("Click Here");; b. Radio buttons are groups of buttons in which, by convention, only one button at a time can be selected. The Swing release supports radio buttons with the JRadioButton and ButtonGroup classes. To put a radio button in a menu , use the JRadioButtonMenuItem class.


Create JFrame + JPanel + button: SWING/GUI in Java TUTORIAL , This Swing Java Tutorial describes developing graphical user interfaces (GUIs) for applications and applets using Swing components. Draw text . To draw text on the screen, you can use Graphics.drawText(string text, int x, int y) method. First parameter is the string that you want to display and last two parameters are the value of point, where this text will start.