Gui事件问题
import   javax.swing.*;
import   java.awt.*;
import   java.awt.event.*;
public   class   TestKey   extends   JPanel{
private   JTextField   jtf;
private   JTextArea   jta;

TestKey(){
this.jtf=new   JTextField(10);
this.jta=new   JTextArea(10,10);
this.add(this.jtf);
this.add(this.jta);
getKey();
}
public   void   getKey(){
this.jtf.addKeyListener(new   TestKeyListener(this));
}
public   void   setKey(){
this.jta.setText(this.jtf.getText());
}
}
class   TestKeyListener   implements   KeyListener   {
private   TestKey   tk;
TestKeyListener(TestKey   tk){
this.tk=tk;
}
public   void   keyPressed(KeyEvent   kevent){
                tk.setKey();//想只有当回车键按下时才引发事件得怎么写？
}
        public   void   keyReleased(KeyEvent   kevent)   {
       
        }
        public   void   keyTyped(KeyEvent   kevent)   {
       
        }
}
class   TestKeyDemo{
public   static   void   main(String   args[]){
JFrame   frame=new   JFrame( "处理键盘事件 ");
frame.setSize(180,300);
frame.add(new   TestKey());
frame.setVisible(true);
}
}
//想只有当回车键按下时才引发事件得怎么写？

------解决方案--------------------
if(kevent.getKeyCode()==KeyEvent.VK_ENTER)
tk.setKey();
可以么