我創建了一個擴展EventButton的類,我稱其爲BirdButton。但是,每個BirdButton都在獨立的類中實例化。他們被實例化爲私有變量,但我想知道我的BirdButton被按下了哪些。單獨的類Driver,如下所示:訪問私有變量
import javax.swing.JFrame;
import javax.swing.JTextField;
public class Driver {
private JFrame win;
private Animals animals = new Animals();
private BirdButton nextBtn, enlargeBtn, shrinkBtn, moveToBtn;
private JTextField field;
public Driver() {
win = new JFrame("Angry Animal Name Game");
win.setBounds(100, 100, 600, 600);
win.setLayout(null);
win.setVisible(true);
nextBtn = new BirdButton("NEXT", 10, 10, animals);
win.add(nextBtn, 0);
enlargeBtn = new BirdButton("ENLARGE", 10, 60, animals);
win.add(enlargeBtn, 0);
shrinkBtn = new BirdButton("SHRINK", 10, 110, animals);
win.add(shrinkBtn, 0);
field = new JTextField();
field.setBounds(10, 250, 100, 20);
win.add(field, 0);
moveToBtn = new BirdButton("MOVETO", 10, 275, animals, field);
win.add(moveToBtn, 0);
win.add(animals, 0);
animals.recenter();
win.repaint();
}
}
您可以看到它創建4個按鈕。我需要知道哪些這些創造我eventAction我的下一個類是按鈕本身:
import java.awt.event.ActionEvent;
import javax.swing.JTextField;
public class BirdButton extends EventButton {
String a;
public BirdButton(String n, int x, int y, Animals a, JTextField field){
super(n);
setLabel(n);
setBounds(x,y,100,30);
a = a;
}
public BirdButton(String n, int x, int y, Animals a) {
this(n, x, y, a, null);
}
public void actionPerformed(ActionEvent e) {
if (e.getSource() == Driver.nextBtn){
animals.goToNext();
}
}
}
我如何能得到我的BirdButton類找出哪個按鈕被按下時,不改變驅動程序類?