我的两个panel分别在不同的文件里面阿,直接引用得到下面的错误:"BottomPanel.java": cannot resolve symbol: variable centerPanel in class com.borland.samples.welcome.BottomPanel at line 63, column 19 如果处理阿
public MyFrame(){ mbpanel = new MyButtonPanel(this); mtfpanel = new MyTextFieldPanel(); mopanel = new MyOtherPanel(); } //在MyButtonPanel按钮事件发生时调用这个方法 public void ChangeMyTextFieldPanel(String strContent){ mtfpanel.改变文本框值方法(strContent); } ... }
如果处理阿
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.awt.event.WindowAdapter;
import java.awt.event.WindowEvent;public class MyFrame extends Frame implements ActionListener
{
TextField field;
public MyFrame(String str){
super(str);
setBounds(300,300,140,180);
this.setBackground(Color.gray);
Panel p1=new Panel();
p1.setLayout(null);
Panel p2=new Panel();
p2.setLayout(null);
Panel p3=new Panel();
p3.setLayout(null);
field= new TextField();
Button b1=new Button("click me");
b1.addActionListener(this);
b1.setBounds(0,0,100,25);
field.setBounds(0,0,100,25);
p2.add(b1);
p3.add(field);
p2.setBounds(10,10,120,30);
p3.setBounds(10,50,120,30);
p1.add(p2);
p1.add(p3);
add(p1);
addWindowListener(new WindowAdapter(){
public void windowClosing(WindowEvent e){
System.exit(0);
}
}
);
setVisible(true);
} public static void main(String args[])
{
MyFrame fr=new MyFrame("test");
}
public void actionPerformed(ActionEvent e)
{
field.setText("dfdjgfjdgl");
}
}
{
MyButtonPanel mbpanel;
MyTextFieldPanel mtfpanel;
MyOtherPanel mopanel;
public MyFrame(){
mbpanel = new MyButtonPanel(this);
mtfpanel = new MyTextFieldPanel();
mopanel = new MyOtherPanel();
} //在MyButtonPanel按钮事件发生时调用这个方法
public void ChangeMyTextFieldPanel(String strContent){
mtfpanel.改变文本框值方法(strContent);
} ...
}