Why do you have a buffama?
Only ELSE is really doing I don't understand, I will help me debug, tell me there.
Import javax.swing. *;
Import java.awt. *;
Import java.awt.event. *;
Public Class Tfhlayout Extends Jframe Implements ActionListener {
Public JButton Button1, Button2, Button3, Button4
Jtextarea area = new Jtextarea (14, 28);
Public void tfhlayout () {
Jframe frame;
JPANel P1, P2;
P1 = new jpanel ();
P2 = new jpanel ();
Frame = New Jframe ("TFH Document");
P1.setLayout (New BoxLayout (P1, BoxLayout.y_AXIS);
Container con = frame.getContentPane ();
Con.SetLayout (New BorderLayout (1, 1));
JButton Button1 = New JButton ("Tanfang said");
JButton Button2 = New JButton ("Long Minjie");
JButton Button3 = New JButton ("Wu Mingki");
JButton Button4 = New JButton ("Tan Wenjuan said");
Button1.addactionListener (this);
Button2.addactionListener (this);
Button3.addactionListener (this);
Button4.addactionListener (this);
P1.Add (Button1);
P1.Add (Button2);
P1.Add (Button3);
P1.Add (Button4);
C. ADD ("West", P1);
P2.Add (Area);
C. ADD (P2);
Frame.setsize (400, 300);
Frame.show ();
frame.addwindowlistener (new windowadapter () {
Public void windowClosing (WindowEvent E) {
System.exit (0);}});
}
Public Void ActionPerformed (ActionEvent E) {
IF (E.getsource () == Button4)
{JOPANE.SHOWMESSAGEDIALOG (NULL, "Hello", "Hello", JOPTIONPANE.INFORMATION_MESSAGE);
Area.setText ("Button1");
}
Else if (E.getsource () == Button2)
Area.setText ("Button2");
Else if (E.Getsource () == Button3)
Area.setText ("Button3");
Else IF (E.GetSource () == Button4)
{JOPANE.SHOWMESSAGEDIALOG (NULL, "Button4", "Hello", JOPANE.INFORMATION_MESSAGE
Area.Settext ("Button4");
Else Area.Settext ("null");}
Public static void main (String [] args) {
TFHLAYOUT APP = New TFHLAYOUT ();
app.tfhlayout ();
}
}
