Re: Swing thread problem
To: comp.lang.java.gui
Felix Dorner wrote:
Hi,
i am trying to write a small app that contains a few JFrames. The
JFrame|s content is controlled by a small command line interpreter. My
problem is, that the JFrames freeze. I created a small code sample to
illustrate this (see below). I guess the Problem does not lie in the
creation of the Swing elements but rather in the implementation of the
Commandline Reader.
Any help is welcome.
Felix
import javax.swing.JFrame;
import javax.swing.SwingUtilities;
public class MainClass {
JFrame frame;
public MainClass(){
initGUI();
runLoop();
}
public static void main(String[] args){
new MainClass();
}
private void initGUI(){
SwingUtilities.invokeLater(new Runnable(){
public void run(){
frame = new JFrame("Test");
frame.setBounds(0,0,200,200);
frame.setVisible(true);
}
});
}
private void runLoop(){
BufferedReader in = new BufferedReader(new
InputStreamReader(System.in));
while(true){
try {
in.readLine();
} catch (IOException e) {
e.printStackTrace();
}
}
}
}
As Danial mentioned your code does work. You are just not doing anything
with the data your read from the BufferedReader.
Replace in.readLine with System.out.println(in.readLine()). You will
then see that you are reading the data. You are just not doing anything
with it once you read it. You should read into var or an array but not
sure what you are trying to do.
Maybe you could add say a visual swing object in to your JFrame and
write the output to that object. You need to explain what you are trying
to do.
These are the imports you should have presented with your example above:
import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;
import javax.swing.JFrame;
import javax.swing.SwingUtilities;
--
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