showcolors.java

来自「这是我学习JAVA时自己的写的代码」· Java 代码 · 共 48 行

// ShowColors.java
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 )
    {
    	// set new drawing color using integers
    	g.setColor( new Color (255,0,0));
    	g.fillRect(25,25,100,20);
    	g.drawString("Current RGB: "+ g.getColor(), 130,40);

   	 // set new drawing color using floats 
    	g.setColor( new Color(0.0f, 1.0f, 0.0f));
      g.fillRect(25,50,100,20);
    	g.drawString("Current RGB: "+ g.getColor(),130,65);
    	
    	// set new drawing color using floats 
    	g.setColor( Color.blue );
      g.fillRect(25,75,100,20);
    	g.drawString("Current RGB: "+ g.getColor(),130,90);
    	
    	//display individual RGB values
    	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 arg[])
    {
    	ShowColors app = new ShowColors();
    	
    	app.WindowiListener(new WindowAdapter() {public void windowClosing (WindowEvent e){System.exit(0);}});
    	}
    
 	}