?? showcolors.java
字號:
import java.awt.*;
import javax.swing.*;
import java.awt.event.*;
public class ShowColors extends JFrame{
public ShowColors(){
super( "Using colors" );
setSize( 400, 130 );
show();
}
public void paint( Graphics g ){
g.setColor( new Color( 255, 0, 0 ) );
g.fillRect( 25, 25, 100, 20 );
g.drawString( "Current RGB: " + g.getColor(), 130, 40 );
g.setColor( new Color( 0.0f, 1.0f, 0.0f ) );
g.fillRect( 25, 50, 100, 20 );
g.drawString( "Current RGB: " + g.getColor(), 130, 65 );
g.setColor( Color.blue );
g.fillRect( 25, 75, 100, 20 );
g.drawString( "Current RGB: " + g.getColor(), 130, 90 );
Color c = Color.magenta;
g.setColor( c );
g.fillRect( 25, 100, 100, 20 );
g.drawString( "RGB values: " + c.getRed() + ", " + c.getGreen() + ", " + c.getBlue(), 130, 115 );
}
public static void main( String args[] ){
ShowColors app = new ShowColors();
app.addWindowListener(
new WindowAdapter() {
public void windowClosing( WindowEvent e ){
System.exit( 0 );
}
}
);
}
}
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