import javax.swing.JFrame;
import javax.swing.JTextArea;
import java.io.PrintStream;
class StreamToTextArea extends JFrame {
//declare PrintStream and JTextArea
private static PrintStream ps = null;
private JTextArea textPane = new JTextArea(); //constructor
public StreamToTextArea() {
setSize( 310, 180 );
getContentPane().add(textPane);
//this is the trick: overload the println(String)
//method of the PrintStream
//and redirect anything sent to this to the text box
ps = new PrintStream(System.out) {
public void println(String x) {
textPane.append(x + "\n");
}
};
}
public PrintStream getPs() {
return ps;
}
public static void main(String args[]) {
//create object
StreamToTextArea blah = new StreamToTextArea();
//show it
blah.show();
//redirect the output stream
System.setOut(blah.getPs());
//print to the text box
System.out.println("IT'S ALIVE!!");
//print to the terminal (not a string)
System.out.println(1);
//print the same thing to the text box (now a string)
System.out.println("" + 1);
}
}
// There are still many other ways to do same thing
posted on 2007-10-18 10:25
forrest 阅读(1669)
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