Java Example Program/ Sample Source Code
import java.awt.BorderLayout;
import java.awt.Frame;
import java.awt.TextComponent;
import java.awt.TextField;
import java.awt.event.TextEvent;
import java.awt.event.TextListener;
import java.awt.event.WindowAdapter;
import java.awt.event.WindowEvent;
class TextValueChangedExample {
public static void main(String args[]) {
Frame frame = new Frame("TextListenerExample");
TextField textField = new TextField();
frame.add(textField, BorderLayout.NORTH);
frame.pack();
frame.setVisible(true);
textField.addTextListener(new MyTextListener("Text Field"));
frame.addWindowListener(new WindowAdapter() {
public void windowClosing(WindowEvent we) {
System.exit(0);
}
});
}
}
class MyTextListener implements TextListener {
String preface;
public MyTextListener(String source) {
preface = source + " text value changed.\n"
+ " First 10 characters: \"";
}
public void textValueChanged(TextEvent e) {
TextComponent tc = (TextComponent) e.getSource();
System.out.println("Typed value in TextComponent " + tc.getText());
}
} |
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