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所以我有一個具有多個JButtons的繪畫程序，我知道如何將該按鈕與該按鈕的動作關聯起來的唯一方法是執行類似if（e.ActionCommand（）。equals （「按鈕的標籤在這裏」）;如果標籤匹配我知道我有正確的動作，但這是我的問題，我試圖改變我的JButtons是圖像，所以而不是有JButton first = new JButton 「Hello」）;我試圖讓JButton first = new JButton（new ImageIcon（「c：/ .....」））然後得到這個圖像，這個工作正常，但是我的問題是，在這之後我不知道如何參考按鈕，使其實際上做些什麼。謝謝!!!JButtons和ActionListeners的問題
import javax.imageio.ImageIO;
import javax.swing.*;
import javax.swing.border.Border;
import javax.swing.border.LineBorder;
import java.awt.*;
import java.awt.event.*;
import java.awt.image.BufferedImage;
import java.io.File;
import java.io.IOException;
import java.util.*;
public class PaintProgram extends JPanel implements MouseListener,ActionListener
{
public static int stroke, eraser = 0;
private int xX1, yY1 , xX2, yY2, choice ;
public static void main(String [] args)
{
new PaintProgram();
}
PaintProgram()
{
JFrame frame = new JFrame("Paint Program");
frame.setSize(1200, 800);
frame.setBackground(Color.WHITE);
frame.getContentPane().add(this);
JMenuBar menuBar = new JMenuBar();
frame.setJMenuBar(menuBar);
JMenu help = new JMenu("Help");
menuBar.add(help);
JMenuItem about = new JMenuItem("About");
help.add(about);
about.addActionListener(this);
JButton button1 = new JButton("Clear");
button1.addActionListener(this);
JButton color = new JButton("Color");
color.addActionListener(this);
JButton erase = new JButton("Erase?");
erase.addActionListener(this);
JButton button2 = new JButton("Empty Rect");
button2.addActionListener(this);
JButton button3 = new JButton("Filled oval");
button3.addActionListener(this);
JButton button4 = new JButton("Filled Rect");
button4.addActionListener(this);
JButton button5 = new JButton("Empty oval");
button5.addActionListener(this);
JButton button6 = new JButton("Line");
button6.addActionListener(this);
JRadioButton thin = new JRadioButton("Thin Line");
thin.addActionListener(this);
JRadioButton medium = new JRadioButton("Medium Line");
medium.addActionListener(this);
JRadioButton thick = new JRadioButton("Thick Line");
thick.addActionListener(this);
ButtonGroup lineOption = new ButtonGroup();
lineOption.add(thin);
lineOption.add(medium);
lineOption.add(thick);
this.add(button1);
this.add(color);
this.add(erase);
this.add(button2);
this.add(button3);
this.add(button4);
this.add(button5);
this.add(button6);
this.add(thin);
this.add(medium);
this.add(thick);
addMouseListener(this);
frame.setVisible(true);
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
}
public void paintComponent(Graphics g)
{
super.paintComponent(g);
Graphics2D g2 = (Graphics2D)g;
if(grid == null){
int w = this.getWidth();
int h = this.getHeight();
grid = (BufferedImage)(this.createImage(w,h));
gc = grid.createGraphics();
gc.setColor(Color.BLUE);
}
g2.drawImage(grid, null, 0, 0);
check();
}
BufferedImage grid;
Graphics2D gc;
public void draw()
{
Graphics2D g = (Graphics2D)getGraphics();
int w = xX2 - xX1;
if (w<0)
w = w *(-1);
int h = yY2-yY1;
if (h<0)
h= h*(-1);
switch(choice)
{
case 1:
check();
gc.drawRect(xX1, yY1, w, h);
repaint();
break;
case 2:
check();
gc.drawOval(xX1, yY1, w, h);
repaint();
break;
case 3:
check();
gc.drawRect(xX1, yY1, w, h);
gc.fillRect(xX1, yY1, w, h);
repaint();
break;
case 4:
check();
gc.drawOval(xX1, yY1, w, h);
gc.fillOval(xX1, yY1, w, h);
repaint();
break;
case 5:
if (stroke == 0)
gc.setStroke(new BasicStroke (1));
if (stroke == 1)
gc.setStroke(new BasicStroke (3));
if (stroke == 2)
gc.setStroke(new BasicStroke (6));
gc.drawLine(xX1, yY1, xX2, yY2);
repaint();
break;
case 6:
repaint();
Color temp = gc.getColor();
gc.setColor(Color.WHITE);
gc.fillRect(0, 0, getWidth(), getHeight());
gc.setColor(temp);
repaint();
break;
case 7:
if (eraser == 1)
{
gc.clearRect(xX1, yY1, w, h);
}
else
{
}
break;
}
}
public void check()
{
if (xX1 > xX2)
{
int z = 0;
z = xX1;
xX1 = xX2;
xX2 =z;
}
if (yY1 > yY2)
{
int z = 0;
z = yY1;
yY1 = yY2;
yY2 = z;
}
}
public void actionPerformed(ActionEvent e)
{
if (e.getActionCommand().equals("Color"))
{
Color bgColor
= JColorChooser.showDialog(this,"Choose Background Color", getBackground());
if (bgColor != null)
gc.setColor(bgColor);
}
if (e.getActionCommand().equals("About"))
{
System.out.println("About Has Been Pressed");
JFrame about = new JFrame("About");
about.setSize(300, 300);
JButton picture = new JButton(new ImageIcon("C:/Users/TehRobot/Desktop/Logo.png"));
about.add(picture);
about.setVisible(true);
}
if (e.getActionCommand().equals("Empty Rect"))
{
System.out.println("Empty Rectangle Has Been Selected~");
choice = 1;
}
if (e.getActionCommand().equals("Empty oval"))
{
System.out.println("Empty Oval Has Been Selected!");
choice = 2;
}
if (e.getActionCommand().equals("Filled Rect"))
{
System.out.println("Filled Rectangle Has Been Selected");
choice = 3;
}
if (e.getActionCommand().equals("Filled oval"))
{
System.out.println("Filled Oval Has Been Selected");
choice = 4;
}
if (e.getActionCommand().equals("Line"))
{
System.out.println("Draw Line Has Been Selected");
choice = 5;
}
if (e.getActionCommand().equals("Thin Line"))
{
stroke = 0;
}
if (e.getActionCommand().equals("Medium Line"))
{
stroke = 1;
}
if (e.getActionCommand().equals("Thick Line"))
{
stroke = 2;
}
if(e.getActionCommand().equals("Erase?"))
{
eraser = 1;
choice = 7;
}
if (e.getActionCommand().equals("Clear"))
{
System.out.println("Clear All The Things!!!");
choice = 6;
draw();
}
}
public void mouseExited(MouseEvent evt){}
public void mouseEntered(MouseEvent evt){}
public void mouseClicked(MouseEvent evt){}
public void mousePressed(MouseEvent evt)
{
xX1 = evt.getX();
yY1= evt.getY();
}
public void mouseReleased(MouseEvent evt)
{
xX2 =evt.getX();
yY2=evt.getY();
draw();
eraser = 0;
}
沒有人想通過大量的代碼來解決問題 - 將它解決到您正在嘗試解決的具體問題 – kleopatra