java自考上机1.docx

一道大题
(1) 在程序界面由上至下依次设按钮A、文本A、按钮B、文本B、按钮C
(2) 按按钮A后,读取外部文件"",将其显示在文本区A中
(3) 按按钮B后,找出文本A中的各英文单词(注意剔除其中的标点),将其按照字典序降序排序后在文本B中逐行输出
(4) 按按钮C后,将文本区B中的内容写入外部文件""
import .*;
import .*;
import .*;
import .*;
public class zikao {
private JButton btnA;
private JTextArea txtAreaA;
private JScrollPane jspA;
private JButton btnB;
private JTextArea txtAreaB;
private JScrollPane jspB;
private JButton btnC;
public zikao(){
JFrame frame = new JFrame(" Exam");
();
(null);
(400, 300);
JPanel pan = new JPanel();
BoxLayout b = new BoxLayout(pan, );
(b);
btnA = new JButton("Button A");
(new ActionListener(){
public void actionPerformed(ActionEvent e){
FileInputStream fis = null;
InputStreamReader isr = null;
try{
String path = ("");
path = path+"/";
//String path = "c://";
File file = new File(path);
fis = new FileInputStream(file);
isr = new InputStreamReader(fis);
StringBuilder textA = new StringBuilder();
int v ;
while(true){
v = ();
if(v==-1){
break;
}
((char)v);
}
(());
}catch (Exception ee) {