[英]Drawing using Graphics in Java
我有一個圖形問題。 我正在嘗試在框架中繪制圖像,但遇到了一些問題。 我想知道成功完成我想做的事情的最佳方法是什么。 我將展示我的 3 個班級。 Main 類創建菜單。 一旦匹配按鈕被按下,它會創建 Board 對象並調用 Main.draw 來繪制它的所有組件(現在僅是 Board)。 圖片只是偶爾出現,所以它讓我意識到我的代碼可能沒有以正確的方式設置。 謝謝!!!
主班
import java.awt.Graphics;
public class Main
{
public static Board theBoard;
public static void main(String[] args)
{
new Menu("Main Menu").setVisible(true);
}
public static void draw(Graphics painter)
{
theBoard.draw(painter);
}
}
菜單類
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import javax.swing.JButton;
import javax.swing.JFrame;
import javax.swing.JPanel;
public class Menu extends JFrame implements ActionListener
{
//Jpanel
JPanel pnlButton = new JPanel();
//Buttons
JButton btnMatchmaking = new JButton("Matchmaking");
JButton btnExit = new JButton("Exit");
JButton btnProfile = new JButton("Profile");
JButton btnOption = new JButton("Options");
public Menu(String s)
{
super("Bu$ted: " + s);
btnExit.addActionListener(this);
btnMatchmaking.addActionListener(this);
//JPanel setting
pnlButton.add(btnMatchmaking);
pnlButton.add(btnProfile);
pnlButton.add(btnOption);
pnlButton.add(btnExit);
pnlButton.setVisible(true);
//The winddow options
super.setLocation(0,0); //A remplacer par des dimension variables
super.setSize(600, 500); //A remplacer par des dimension variables
super.setResizable(false);
super.setVisible(true);
super.add(pnlButton);
setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
}
//Handle action events.
//@param evt
@Override
public void actionPerformed(ActionEvent evt)
{
if(evt.getSource() == btnMatchmaking)
{
super.remove(pnlButton);
Main.theBoard = new Board("TestBoard");
super.add(Main.theBoard);
super.setSize(Main.theBoard.boardSize);
Main.draw(super.getGraphics());
}
if(evt.getSource() == btnExit)
{
System.exit(0);
}
}
}
董事會課程
import java.awt.Dimension;
import java.awt.Graphics;
import java.awt.image.BufferedImage;
import java.io.File;
import java.io.IOException;
import javax.imageio.ImageIO;
import javax.swing.JPanel;
public class Board extends JPanel
{
BufferedImage boardImage;
int width;
int height;
Dimension boardSize;
public Board (String boardName)
{
boardImage = loadBoard(boardName);
width=boardImage.getWidth();
height=boardImage.getHeight();
boardSize = new Dimension(width,height);
this.setVisible(true);
System.out.println("The board is setup.");
}
private BufferedImage loadBoard (String boardName)
{
BufferedImage img = null;
try
{
img = ImageIO.read(new File("Components/"+boardName+".png"));
}
catch (IOException e)
{
System.out.println("The board image couldn't be loaded.");
}
return img;
}
public void draw(Graphics painter)
{
painter.drawImage(boardImage, 0, 0, null);
System.out.println("The board image was painted.");
}
}
推薦的方法是覆蓋Board
類的paintComponent
並讓繪制系統處理它......
有關更多詳細信息,請參閱AWT 和 Swing 中的繪畫以及執行自定義繪畫
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