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50 lines
1.3 KiB
Java
50 lines
1.3 KiB
Java
Creating radio buttons using CheckboxGroup and Checkbox
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import java.applet.Applet;
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import java.awt.*;
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public class RadioButton extends Applet {
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private TextField t;
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private Font f;
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private CheckboxGroup radio;
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private Checkbox radioBold, radioItalic,
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radioPlain;
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public void init()
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{
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t = new TextField( "Sample Text", 40 );
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// instantiate checkbox group (i.e. radio buttons)
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radio = new CheckboxGroup();
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add( t ); // add textfield
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// instantiate radio button objects
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add( radioPlain = new Checkbox( "Plain", radio, true ) );
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add( radioItalic = new Checkbox( "Italic", radio, false ) );
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add( radioBold = new Checkbox( "Bold", radio, false ) );
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}
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public boolean action( Event e, Object o )
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{
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int style;
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// Check for Checkbox event
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if ( e.target instanceof Checkbox) {
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// test state of radio buttons
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if ( radioPlain.getState() == true )
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style = Font.PLAIN;
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else if ( radioItalic.getState() == true )
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style = Font.ITALIC;
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else
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style = Font.BOLD;
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f = new Font( "TimesRoman", style, 14 );
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t.setFont( f );
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}
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return true;
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}
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}
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