I've tried rearranging this a whole bunch and using different methods that weren't static but the button never appears. all of this code is meant for chess but I working on adding buttons to make it playable, and I've been having a hard time with this for the past few days. there is other issues like the mouse not doing anything, but i jut removed everything to try and focus on the buttons. a
import javax.swing.*;
import java.awt.*;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.awt.event.MouseEvent;
import java.awt.event.MouseListener;
public class Main extends Canvas implements ActionListener, MouseListener {
private static JButton try144Button = new JButton();
public static void main(String[] args) {
JFrame frame = new JFrame("Chess");
Canvas canvas = new Main();
canvas.setSize(1000, 1000);
frame.add(canvas);
frame.add(try144Button);
frame.pack();
frame.setVisible(true);
}
public Main(){
try144Button.setBounds(0, 0, 500, 500);
try144Button.setText("CLICK ME");
try144Button.setBounds(210, 60, 150, 150);}
private void add(JButton try144Button) {
}
public void paint(Graphics g) {
int xshift;
int yshift = 0;
g.setColor(new Color(0, 0, 0));
for (int i = 0; i < 4; i ) {
xshift = 125;
for (int j = 0; j < 4; j ) {
g.fillRect(xshift, yshift, 125, 125);
xshift = 250;
}
xshift = 0;
yshift = 125;
for (int k = 0; k < 4; k ) {
g.fillRect(xshift, yshift, 125, 125);
xshift = 250;
}
yshift = 125;
}
initalprnt(g);
}
public void initalprnt(Graphics g) {
int xshift = 125;
int yshift = 0;
g.setColor(new Color(0, 100, 0));
for (int i = 0; i < 3; i ) {
if (i == 2) {
xshift = 125;
}
for (int j = 0; j < 4; j ) {
g.fillOval(xshift, yshift, 125, 125);
xshift = 250;
}
xshift = 0;
yshift = 125;
}
yshift = 250;
g.setColor(new Color(0, 0, 100));
for (int k = 0; k < 3; k ) {
if (k == 2) {
xshift = 0;
}
for (int j = 0; j < 4; j ) {
g.fillOval(xshift, yshift, 125, 125);
xshift = 250;
}
xshift = 125;
yshift = 125;
}
}
public void actionPerformed(ActionEvent evt) {
Object src = evt.getSource();
if (src == try144Button)
System.out.println("this worked");
}
public void mouseClicked(MouseEvent e) {}
public void mousePressed(MouseEvent e) {}
public void mouseReleased(MouseEvent e) {}
public void mouseEntered(MouseEvent e) {}
public void mouseExited(MouseEvent e) {}
}
CodePudding user response：
Unless you're doing some super low level work, you should avoid using Canvas, in your case, a JPanel will do just fine.
If you override a method of a class, you should beware of what that method does and either be prepared to replicate its work (as much as your implementation requires it to) or call it's super method.
I would recommend you start by looking at 
import java.awt.Color;
import java.awt.Dimension;
import java.awt.EventQueue;
import java.awt.Graphics;
import java.awt.Graphics2D;
import java.awt.GridBagConstraints;
import java.awt.GridBagLayout;
import java.awt.RadialGradientPaint;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.awt.event.MouseEvent;
import java.awt.event.MouseListener;
import javax.swing.JButton;
import javax.swing.JFrame;
import javax.swing.JPanel;
public class Test {
public static void main(String[] args) {
new Test();
}
public Test() {
EventQueue.invokeLater(new Runnable() {
@Override
public void run() {
JFrame frame = new JFrame("Chess");
JPanel contentPane = new JPanel(new GridBagLayout());
GridBagConstraints gbc = new GridBagConstraints();
gbc.gridx = 0;
gbc.gridy = 0;
gbc.weightx = 1;
gbc.weighty = 1;
gbc.fill = gbc.BOTH;
GameListener listener = new GameListener() {
private AlertPane alertPane;
private AlertPane getAlertPane() {
if (alertPane != null) {
return alertPane;
}
alertPane = new AlertPane();
alertPane.setGameListener(this);
return alertPane;
}
@Override
public void gameWasCompleted() {
contentPane.add(getAlertPane(), gbc);
contentPane.setComponentZOrder(getAlertPane(), 0);
contentPane.revalidate();
contentPane.repaint();
}
@Override
public void startNewGame() {
contentPane.remove(getAlertPane());
contentPane.revalidate();
contentPane.repaint();
}
};
MainPane mainPane = new MainPane();
mainPane.setGameListener(listener);
contentPane.add(mainPane, gbc);
frame.setContentPane(contentPane);
frame.pack();
frame.setLocationRelativeTo(null);
frame.setVisible(true);
}
});
}
public interface GameListener {
public void gameWasCompleted();
public void startNewGame();
}
public class AlertPane extends JPanel {
private GameListener gameListener;
private JButton try144Button;
public AlertPane() {
setLayout(new GridBagLayout());
setOpaque(false);
try144Button = new JButton();
try144Button.setText("CLICK ME");
try144Button.setBounds(210, 60, 150, 150);
add(try144Button);
try144Button.addActionListener(new ActionListener() {
@Override
public void actionPerformed(ActionEvent e) {
gameListener.startNewGame();
}
});
}
public void setGameListener(GameListener gameListener) {
this.gameListener = gameListener;
}
@Override
protected void paintComponent(Graphics g) {
super.paintComponent(g);
Graphics2D g2d = (Graphics2D) g.create();
Color startColor = new Color(255, 255, 0, 0);
Color endColor = new Color(255, 255, 0, 192);
RadialGradientPaint rgp = new RadialGradientPaint(
getWidth() / 2, getHeight() / 2,
Math.max(getWidth(), getHeight()),
new float[]{0f, 0.25f},
new Color[]{startColor, endColor});
g2d.setPaint(rgp);
g2d.fillRect(0, 0, getWidth(), getHeight());
g2d.dispose();
}
}
public class MainPane extends JPanel implements MouseListener {
private GameListener gameListener;
public MainPane() {
addMouseListener(this);
}
public void setGameListener(GameListener gameListener) {
this.gameListener = gameListener;
}
@Override
public Dimension getPreferredSize() {
return new Dimension(1000, 1000);
}
@Override
protected void paintComponent(Graphics g) {
super.paintComponent(g);
int xshift;
int yshift = 0;
g.setColor(new Color(0, 0, 0));
for (int i = 0; i < 4; i ) {
xshift = 125;
for (int j = 0; j < 4; j ) {
g.fillRect(xshift, yshift, 125, 125);
xshift = 250;
}
xshift = 0;
yshift = 125;
for (int k = 0; k < 4; k ) {
g.fillRect(xshift, yshift, 125, 125);
xshift = 250;
}
yshift = 125;
}
initalprnt(g);
}
protected void initalprnt(Graphics g) {
int xshift = 125;
int yshift = 0;
g.setColor(new Color(0, 100, 0));
for (int i = 0; i < 3; i ) {
if (i == 2) {
xshift = 125;
}
for (int j = 0; j < 4; j ) {
g.fillOval(xshift, yshift, 125, 125);
xshift = 250;
}
xshift = 0;
yshift = 125;
}
yshift = 250;
g.setColor(new Color(0, 0, 100));
for (int k = 0; k < 3; k ) {
if (k == 2) {
xshift = 0;
}
for (int j = 0; j < 4; j ) {
g.fillOval(xshift, yshift, 125, 125);
xshift = 250;
}
xshift = 125;
yshift = 125;
}
}
public void mouseClicked(MouseEvent e) {
gameListener.gameWasCompleted();
}
public void mousePressed(MouseEvent e) {
}
public void mouseReleased(MouseEvent e) {
}
public void mouseEntered(MouseEvent e) {
}
public void mouseExited(MouseEvent e) {
}
}
}