全彩LED。全彩LED内置了红(Red)、绿(Green)和蓝(Blue)三种颜色的灯珠,根据三原色的原理,通过控制不同颜色灯珠的RGB值,调出多种颜色。
全彩LED。全彩LED内置了红(Red)、绿(Green)和蓝(Blue)三种颜色的灯珠,根据三原色的原理,通过控制不同颜色灯珠的RGB值,调出多种颜色。
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阅读以下说明和Java代码,将应填入(n)处的语句写在对应栏内。【说明】本程序通过移动滑动条修改颜色RGB值,从而控制颜色。程序中有一个面板、3个标签和3个滑动条,标签和滑动条一一对应,分别对应三原色红、绿、蓝,任意拖动其中的一个滑动条,所对应的颜色值就会发生变化,面板的颜色也会发生对应的变化,如下图所示,滑动条值的范围是0~255。【Java代码】import java.awt.*;import java.awt.event.*;import javax.swing.*;public class simple extends JFrame. implements AdjustmentListener{public simple(){setTitle("simple");setSize(300, 200);addWindowListener(new WindowAdapter(){public void windowClosing((1)){System.exit(0);}});Container contentPane=getContentPane();JPanel p=(2);p.setLayout(new GridLayout(3, 2));p.add(redLabel=new JLabel("Red 0"));p.add(red=new JScrollBar(Adjustable. HORIZONTAL, 0, 0, 0, 255));red.setBlocklncrement(16);red.addAdjustmentListener(this);p.add(greenLabel=(3) ("Green 0"));p.add(green=new JScrollBar(Adjustable.HORIZONTAL 0, 0, 0, 255));green setBIocklncrement(16);green.addAdjustmentListener(this);p.add(blueLabel=new JLabel("Blue 0"));p.add(btue=new JScrollBar(Adjustable. HORIZONTAL, 0, 0, 0, 255));blue,setBIocklncrement(16);blue.addAdjustmentListener(this);contentPane.add(p, "South");colorPanet=new JPanel();colorPanet.setBackground(new Color(0, 0, 0));contentPane.add((4),"Center");} public void adjustmentValueChanged(AdjustmentEvent evt){redLabel.setText("Red"+red.getValue());greenLabel.setText("Green"+green.getValue());blueLabel.setText("Blue"+blue.getValue());coiorPanel.setBackground(new Color(red.getValue(), green.getValue(), blue.getValue()));colorPanel.repaint();}public static void main(String[] args){JFrame. f=(5);f.show();}private JLabel redLabel;private JLabel greenLabel;private JLabel blueLabel;private JScrollBar red;private JScroilBar green;private JScrollBar blue;private JPanel colorPanel;
阅读以下说明和 Java 代码,填补代码中的空缺,将解答填入答题纸的对应栏内。 【说明】 设计 RGB 方式表示颜色的调色板,进行绘图。其类图如图 6-1 所示。该程序的 Java代码附后。图6-1 类图【Java 代码】 //颜色类 class MyColor { private int red ,green, blue; public MyColor( ) { red = o; green = 0; blue = 0; } public MyColor(int red ,int green ,int blue) { this.red = red; this.green = green; this.blue = blue; } //其他方法略 public String toString( ) { return Red: + red + \tGreen: + green + \tBlue + blue; } } //调色板类 class Palette { public int number; / /颜色数 private (1)palette; //颜色表 public Palette( ) { number = 256; palette = new MyColor[number); } public Palette(MyColor[] palette ,int number) { (2)= number; (3)= palette; } //其他方法略 public String toString( ) { String str = ; for (int i = 0; i number; i++) { str +=i+ : + palette[i] + \n; } return str; } //绘图类 class Drawing { public (4) int COLORNUMBER = 16; public static void main(String[] args) { Palette palette; int red ,green ,blue; MyColor[] color = new MyColor[COLORNUMBER]; for (int i = 0; i COLORNUMBER; i++) { red = (int) (Math.random( ) * 256); green = (int) (Math.random( ) * 256); blue = (int) (Math.random( ) * 256); color [i] = (5) (red ,green ,blue); } palette = new Palette(color ,COLORNUMBER); System.out.println(palette); } }
单选题在Photoshop中,RGB颜色模式所代表的三种基本颜色是()。A红、绿、黄B绿、蓝、紫C蓝、红、橙D红、绿、蓝