64 lines
1.5 KiB
Java
64 lines
1.5 KiB
Java
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Change component visibility
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package com.ack.gui.awt.simple;
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import java.awt.*;
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import java.awt.event.ActionEvent;
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import java.awt.event.ActionListener;
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import java.awt.event.WindowAdapter;
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import java.awt.event.WindowEvent;
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public class ChangeComponentVisibility extends Frame {
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Panel tp, bp, cp;
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Button b1;
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TextField tf;
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public ChangeComponentVisibility( String s ) {
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super( s );
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init();
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}
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public void init() {
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setLayout( new BorderLayout() );
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tp = new Panel();
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bp = new Panel();
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cp = new Panel();
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b1 = new Button( "Change Visibility" );
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bp.add( b1 );
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MyActionListener mal = new MyActionListener();
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b1.addActionListener( mal );
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add( "North", tp );
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add( "South", bp );
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add( "Center", cp );
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addWindowListener( new WindowAdapter() {
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public void windowClosing( WindowEvent we ) {
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dispose();
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System.exit( 0 );
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}
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} );
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tf = new TextField( "MyLabel", 60 );
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cp.add( tf );
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pack();
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setVisible( true );
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}
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public static void main( String[] argv ) {
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ChangeComponentVisibility it =
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new ChangeComponentVisibility( "Change Component Visibility" );
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}
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class MyActionListener implements ActionListener {
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public void actionPerformed( ActionEvent ae ) {
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boolean b = tf.isVisible();
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if( b ) {
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tf.setVisible( false );
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}
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else {
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tf.setVisible( true );
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}
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}
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}
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}
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