请问这是怎么错了啊？
import javax.swing.*;
import java.awt.event.*;
import java.awt.*;
public class MyFlowLayoutDemo extends Frame{
//private final JPanel jpanel = new JPanel();
private final String name[] = {"left","center","right"};
private final Button jbutton[] = new Button[3];
private final FlowLayout flowLayout = new FlowLayout();
ActionListener listener = new ActionListener(){
public void actionPerformed(ActionEvent event){
if(((Button)event.getSource()).getLabel().equals("left")){
////System.out.print("left");
flowLayout.setAlignment(FlowLayout.LEFT);
flowLayout.layoutContainer(this);
}
if(((Button)event.getSource()).getLabel().equals("right")){
flowLayout.setAlignment(FlowLayout.RIGHT);
//System.out.println("right");
}
else flowLayout.setAlignment(FlowLayout.CENTER);
}
};
public MyFlowLayoutDemo(){
super();
//add(jpanel,BorderLayout.CENTER);
setLayout(flowLayout);
for(int i=0;i<jbutton.length;i++){
jbutton[i] = new Button(name[i]);
add(jbutton[i]);
jbutton[i].addActionListener(listener);
}
setSize(500,250);
setVisible(true);
}
public static void main(String[] args){
new MyFlowLayoutDemo();
}
}
MyFlowLayoutDemo.java:15: 无法将 layoutContainer 中的 方法 应用于 java.awt.Cont
iner(<匿名 java.awt.event.ActionListener>)
flowLayout.layoutContainer(this);
^
1 错误
请问这是为什么呀？
[解决办法]
另外 把你的 if语句改为if(e.getActionCommand().equals("left")) 这样判断会好一些...
[解决办法]
flowLayout.layoutContainer(this); //这里的this指的是内部类对象本身，而你要用的外部类的this，所以改成
flowLayout.layoutContainer(MyFlowLayoutDemo.this);
