Tutorials : Java by Example : Section 4 :

Functions and Arrays

Loops, Advanced Color Functions - Con't

//Sourcecode import java.awt.*; import java.applet.*; public class Project15 extends Applet { Color myGreen = new Color(110,220,160); Color myRed = new Color(255,90,100); Color myYellow = new Color(240,240,180); Color myBlue = new Color(140,190,250); public void paint (Graphics g) { //paint background black g.setColor(Color.black); g.fillRect(0,0,size().width,size().height); g.setColor(new Color(255,255,0)); g.fillOval(10,10,50,50); g.setColor(myGreen); g.fillOval(65,10,50,50); g.setColor(myRed); g.fillOval(120,10,50,50); g.setColor(myYellow); g.fillOval(175,10,50,50); g.setColor(myBlue); g.fillOval(230,10,50,50); float color; int i; int WIDTH=300; //the three color gradients: red, green, blue for(i=0; i<WIDTH; i++) { color=i*(float)255/WIDTH; g.setColor(new Color((int)color,0,0)); g.drawLine(i,70,i,90); g.setColor(new Color(0,(int)color,0)); g.drawLine(i,95,i,115); g.setColor(new Color(0,0,(int)color)); g.drawLine(i,120,i,140); } //the rainbow color spectrum for(i=0; i<WIDTH; i++) { color=(float)i/WIDTH; g.setColor(Color.getHSBColor(color,1.0f,1.0f)); g.drawLine(i,150,i,220); } Color myPink = new Color(240,100,150); g.setColor(myPink.darker().darker()); g.fillRect(15,240,45,40); g.setColor(myPink.darker()); g.fillRect(70,240,45,40); g.setColor(myPink); g.fillRect(125,240,45,40); g.setColor(myPink.brighter()); g.fillRect(180,240,45,40); g.setColor(myPink.brighter().brighter()); g.fillRect(235,240,45,40); } }

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