为什么我的JPanels没有显示颜色或形状 [英] Why are my JPanels not showing color or shapes
本文介绍了为什么我的JPanels没有显示颜色或形状的处理方法,对大家解决问题具有一定的参考价值,需要的朋友们下面随着小编来一起学习吧!
问题描述
因此,每当我运行应用程序时,框架就在那里,但是所有颜色和矩形都没有.我要制作3个不同的菜单,每个菜单都比较难处理,所以我的框架中需要3个面板
So whenever I run the application the frame is there however all the colors and rectangles are not. I'm making 3 different menus each intractable so I need 3 panels within my frame
import java.awt.*;
import java.awt.event.*;
import javax.swing.*;
public class Application extends JPanel{
public static void main(String[] args) {
JFrame frame = new JFrame("FrogVibes");
JPanel container = new JPanel();
JPanel mainPanel = new JPanel();
JPanel upgradePanel = new JPanel();
JPanel frogPanel = new JPanel();
JButton button = new JButton();
mainPanel.setSize(400,690);
upgradePanel.setSize(400,690);
frogPanel.setSize(400,690);
mainPanel.setBackground(Color.BLACK);
upgradePanel.setBackground(Color.BLACK);
frogPanel.setBackground(Color.BLACK);
container.setLayout(new BoxLayout(container, BoxLayout.X_AXIS));
container.add(mainPanel);
container.add(upgradePanel);
container.add(frogPanel);
new Application() {
};
frame.setContentPane(new Container());
frame.setSize(1280,700);
frame.setVisible(true);
frame.addWindowListener(new WindowAdapter() {
public void windowClosing(WindowEvent e) {
System.exit(0);
}
});
}
public void Graphics(Graphics g) {
super.paintComponent(g);
g.drawRect(0,700,400,100);
g.drawRect(0, 600,100,150);
}
}
什么是错误的位置,缺少的语句或什么
what is wrong placement, a missing statement, or what
推荐答案
您只有一个错别字,您需要像frame.setContentPane(container);
一样将创建的container
添加到frame
中,而不是添加新容器.我只是改变颜色,以便您可以看到每个面板:
You have just a miss typos, you need to add container
that you created to the frame
like so frame.setContentPane(container);
instead of adding a new container. and I just change colors so that you can see each panel :
import java.awt.*;
import java.awt.event.*;
import javax.swing.*;
public class Application extends JPanel{
public static void main(String[] args) {
JFrame frame = new JFrame("FrogVibes");
JPanel container = new JPanel();
JPanel mainPanel = new JPanel();
JPanel upgradePanel = new JPanel();
JPanel frogPanel = new JPanel();
JButton button = new JButton("button!");
mainPanel.setSize(400,200);
upgradePanel.setSize(500,690);
frogPanel.setSize(400,690);
mainPanel.setBackground(Color.RED);
upgradePanel.setBackground(Color.BLACK);
frogPanel.setBackground(Color.BLUE);
upgradePanel.add(button);
container.setLayout(new BoxLayout(container, BoxLayout.X_AXIS));
container.add(mainPanel);
container.add(upgradePanel);
container.add(frogPanel);
new Application() {
};
frame.setContentPane(container);
frame.setSize(1280,700);
frame.setVisible(true);
frame.addWindowListener(new WindowAdapter() {
public void windowClosing(WindowEvent e) {
System.exit(0);
}
});
}
public void Graphics(Graphics g) {
super.paintComponent(g);
g.drawRect(0,700,400,100);
g.drawRect(0, 600,100,150);
}
}
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