你们再仔细看看 问题没有那么简单
[code=Java][/code]
class ButtonAction implements ActionListener{
MyLinkedList list1 = new MyLinkedList();
public void actionPerformed(ActionEvent e){
if(e.getSource() == button1){
String s1 = text1.getText();
String s2 = "02";
list1.add(list1.size(),s1);
list1.add(list1.size(),s2);
int n = list1.getSection(s1);// 这个地方 ，s1改s2 就会出错
text3.setText((String)list1.getElement(n));
}
else if(e.getSource() == button2){
String s2 = text2.getText();//这个地方 还是会报错 为什么在上面就能行呢？？
int n = list1.getSection(s2);
text3.setText((String)list1.getElement(n));
}
}
}

[解决办法]

Java code

class ButtonAction implements ActionListener{    MyLinkedList list1 = new MyLinkedList();    public void actionPerformed(ActionEvent e)    {        if(e.getSource() == button1)        {            String s1 = text1.getText();            String s2 = "02";            List.add(List.size(),s1);            List.add(list1.size(),s2);            /*对不起，你这地方是要用String             * 详情可以参照             * http://www.eclipselight.org/swt-jface/1022/             * */            int n = list1.getSection(s1);// 这个地方 ，s1改s2 就会出错            text3.setText((String)list1.getElement(n));        }        else if(e.getSource() == button2)        {            //这个不是很清楚            String s2 = text2.getText();//这个地方 还是会报错 为什么在上面就能行呢？？            int n = list1.getSection(s2);            text3.setText((String)list1.getElement(n));        }    }}