java-swing画图

MyRect.java

package Main;

public class MyRect {
	public int x = 0;
	public int y = 0;
	public MyRgb rgb = new MyRgb();
	long createtime = 0;
	
	public MyRect() {
		
	}
	public MyRect(int mx, int my, MyRgb myrgb, long time) {
		x = mx;
		y = my;
		rgb = myrgb;
		createtime = time;
	}
}

　　MyRgb.java

package Main;

public class MyRect {
    public int x = 0;
    public int y = 0;
    public MyRgb rgb = new MyRgb();
    long createtime = 0;
    
    public MyRect() {
        
    }
    public MyRect(int mx, int my, MyRgb myrgb, long time) {
        x = mx;
        y = my;
        rgb = myrgb;
        createtime = time;
    }
}

 

GraphicsTest.java

package Main;

import java.awt.*;
import javax.swing.*;

import java.awt.image.BufferedImage;
import java.awt.Graphics;
import java.awt.Toolkit;
import java.awt.Dimension;
import java.awt.Color;
import java.awt.Graphics2D;

import java.awt.event.*;
import java.awt.event.KeyEvent;
import java.awt.event.KeyListener;

import java.awt.im.InputContext;

import java.util.Random;
import java.util.ArrayList;
import java.util.Locale;

import Main.MyRgb;

public class GraphicsTest extends JPanel {
    int keyoffsetx = 0;
    int keyoffsety = 0;
    ArrayList<MyRgb> rgbList = new ArrayList<MyRgb>();
    
    public GraphicsTest() {
        MyRgb rgbs1 = new MyRgb();
        for(int i = 0; i < 20; i++) {
            rgbs1 = getRandRgb();
            rgbList.add(rgbs1);
        }
        
    }
    
    public void keyPressed(String key) {
        System.out.println("keyPressed: " + key);
        if(key.equals("A")) {
            keyoffsetx -= 5;
        }
        
        if(key.equals("D")) {
            keyoffsetx += 5;
        }
        
        if(key.equals("W")) {
            keyoffsety -= 5;
        }
        if(key.equals("S")) {
            keyoffsety += 5;
        }
        this.updateUI();
    }
    
    public int randInt(int min, int max) {
        Random rand1 = new Random();
        int randomNum = rand1.nextInt((max - min) + 1) + min;
        return randomNum;
    }
    
    public Color getColorWithRgbs(MyRgb rgbs) {
        return new Color(rgbs.r, rgbs.g, rgbs.b);
    }
    
    public MyRgb getRandRgb() {
        MyRgb res = new MyRgb(randInt(1,255), randInt(1,255), randInt(1,255));
        
        return res;
    }
    
    public MyRgb getReverseRgb(MyRgb rgbs) {
        MyRgb res = new MyRgb();
        res.r = 255 - rgbs.r;
        res.g = 255 - rgbs.g;
        res.b = 255 - rgbs.b;
        
        return res;
    }
    
    public void paintComponent(Graphics g) {
        super.paintComponent(g);
        
        int panel_width = getWidth();
        int panel_height = getHeight();
        System.out.println("画布宽度:"+panel_width);
        System.out.println("画布高度:"+panel_height);
        System.out.println();
        
        //清除指定矩形区域的像素
        //void clearRect(int x, int y, int width, int height)
        //g.clearRect(0, 0, panel_width, panel_height);
        
        //设置画板背景颜色
        setBackground(new Color(128, 0, 128));
        
        //设置画板背景图片
        Toolkit toolkit = Toolkit.getDefaultToolkit();
        Image image = toolkit.getImage("bg001.jpeg");
        //void drawImage(Image img, int x, int y, ImageObserver observer)
        //g.drawImage(image, 0, 0, panel_width, panel_height, this);
        
        MyRgb rgbs1 = new MyRgb();
        MyRgb rgbs2 = new MyRgb();
        
        int rgbindex = 0;
        int offsetx = (int)((panel_width-330)/2);
        int offsety = (int)((panel_height-240)/2);
        offsetx = offsetx + keyoffsetx;
        offsety = offsety + keyoffsety;
        
        //矩形
        rgbs1 = rgbList.get(rgbindex);rgbindex++;
        rgbs2 = getReverseRgb(rgbs1);
        g.setColor(getColorWithRgbs(rgbs1));
        //void drawRect(int x, int y, int width, int height)
        g.drawRect(offsetx+5, offsety+5, 50, 50);
        g.setColor(getColorWithRgbs(rgbs2));
        g.drawString("矩形", offsetx+20, offsety+30);
        
        //填充矩形
        rgbs1 = rgbList.get(rgbindex);rgbindex++;
        rgbs2 = getReverseRgb(rgbs1);
        g.setColor(getColorWithRgbs(rgbs1));
        //void fillRect(int x, int y, int width, int height)
        g.fillRect(offsetx+5, offsety+65, 50, 50);
        g.setColor(getColorWithRgbs(rgbs2));
        g.drawString("填矩", offsetx+20, offsety+90);
        
        //绘制一个圆角矩形
        rgbs1 = rgbList.get(rgbindex);rgbindex++;
        rgbs2 = getReverseRgb(rgbs1);
        g.setColor(getColorWithRgbs(rgbs1));
        //void drawRoundRect(int x, int y, int width, int height, int arcWidth, int arcHeight)
        g.drawRoundRect(offsetx+5, offsety+125, 50, 50, 8, 8);
        g.setColor(getColorWithRgbs(rgbs2));
        g.drawString("圆矩", offsetx+20, offsety+155);
        
        //填充一个圆角矩形
        rgbs1 = rgbList.get(rgbindex);rgbindex++;
        rgbs2 = getReverseRgb(rgbs1);
        g.setColor(getColorWithRgbs(rgbs1));
        //void fillRoundRect(int x, int y, int width, int height, int arcWidth, int arcHeight)
        g.fillRoundRect(offsetx+5, offsety+185, 50, 50, 15, 15);
        g.setColor(getColorWithRgbs(rgbs2));
        g.drawString("圆角", offsetx+20, offsety+220);
 
        //椭圆
        rgbs1 = rgbList.get(rgbindex);rgbindex++;
        rgbs2 = getReverseRgb(rgbs1);
        g.setColor(getColorWithRgbs(rgbs1));
        //void drawOval(int x, int y, int width, int height)
        g.drawOval(offsetx+65, offsety+5, 50, 50);
        g.setColor(getColorWithRgbs(rgbs2));
        g.drawString("椭圆", offsetx+77, offsety+32);
        
        //填充椭圆
        rgbs1 = rgbList.get(rgbindex);rgbindex++;
        rgbs2 = getReverseRgb(rgbs1);
        g.setColor(getColorWithRgbs(rgbs1));
        //void fillOval(int x, int y, int width, int height)
        g.fillOval(offsetx+65, offsety+65, 50, 60);
        g.setColor(getColorWithRgbs(rgbs2));
        g.drawString("填椭", offsetx+77, offsety+97);
 
        //线
        rgbs1 = rgbList.get(rgbindex);rgbindex++;
        rgbs2 = getReverseRgb(rgbs1);
        g.setColor(getColorWithRgbs(rgbs1));
        //void drawLine(int x1, int y1, int x2, int y2)
        g.drawLine(offsetx+75, offsety+185, offsetx+145, offsety+205);
        g.setColor(getColorWithRgbs(rgbs2));
        g.drawString("线", offsetx+97, offsety+185);
 
        //圆弧
        rgbs1 = rgbList.get(rgbindex);rgbindex++;
        rgbs2 = getReverseRgb(rgbs1);
        g.setColor(getColorWithRgbs(rgbs1));
        //void drawArc(int x, int y, int width, int height, int startAngle, int arcAngle)
        g.drawArc(offsetx+125, offsety+5, 78, 81, 100, 121);
        g.setColor(getColorWithRgbs(rgbs2));
        g.drawString("圆弧", offsetx+137, offsety+37);
        
        //填充圆形，扇形
        rgbs1 = rgbList.get(rgbindex);rgbindex++;
        rgbs2 = getReverseRgb(rgbs1);
        g.setColor(getColorWithRgbs(rgbs1));
        //void fillArc(int x, int y, int width, int height, int startAngle, int arcAngle)
        g.fillArc(offsetx+125, offsety+85, 88, 91, 110, 131);
        g.setColor(getColorWithRgbs(rgbs2));
        g.drawString("扇形", offsetx+137, offsety+132);
        
        //绘制一个多边形
        int[] xPoints1 = new int[]{offsetx+183, offsetx+223, offsetx+331, offsetx+210, offsetx+190};
        int[] yPoints1 = new int[]{offsety+10, offsety+41, offsety+71, offsety+81, offsety+91};
        int nPoints1 = 5;
        rgbs1 = rgbList.get(rgbindex);rgbindex++;
        rgbs2 = getReverseRgb(rgbs1);
        g.setColor(getColorWithRgbs(rgbs1));
        //void drawPolygon(int[] xPoints, int[] yPoints, int nPoints)
        g.drawPolygon(xPoints1, yPoints1, nPoints1);
        g.setColor(getColorWithRgbs(rgbs2));
        g.drawString("多边形", offsetx+197, offsety+57);
        
        //填充一个多边形
        int[] xPoints2 = new int[]{offsetx+183, offsetx+223, offsetx+331, offsetx+210, offsetx+190};
        int[] yPoints2 = new int[]{offsety+115, offsety+133, offsety+198, offsety+242, offsety+277};
        int nPoints2 = 5;
        rgbs1 = rgbList.get(rgbindex);rgbindex++;
        rgbs2 = getReverseRgb(rgbs1);
        g.setColor(getColorWithRgbs(rgbs1));
        //void fillPolygon(int[] xPoints, int[] yPoints, int nPoints)
        g.fillPolygon(xPoints2, yPoints2, nPoints2);
        g.setColor(getColorWithRgbs(rgbs2));
        g.drawString("填多边", offsetx+217, offsety+197);
    }
    
    private static void createAndShowGUI() {
        // 获取屏幕分辨率
        Toolkit toolkit = Toolkit.getDefaultToolkit();
        Dimension screenSize = toolkit.getScreenSize();
        
        double percent = 0.6;
        int screen_width = screenSize.width;
        int screen_height = screenSize.height;
        System.out.println("屏幕宽度:"+screen_width);
        System.out.println("屏幕高度:"+screen_height);
        System.out.println();
        
        int window_width = (int)(screen_width * percent);
        int window_height = (int)(screen_height * percent);
        System.out.println("窗体宽度:"+window_width);
        System.out.println("窗体高度:"+window_height);
        System.out.println();
        
        JFrame frame = new JFrame("GraphicsTest");
        frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        frame.setLocation((screen_width-window_width)/2, (screen_height-window_height)/2);
        frame.setSize(window_width, window_height);
        
        GraphicsTest gtPanel = new GraphicsTest();

        
        // 注册键盘监听器
        frame.addKeyListener(new KeyListener() {
            @Override
            public void keyTyped(KeyEvent e) {
                if (e.isAltDown()) {
                    System.out.println("alt"+"键被按下了");
                } else if(e.isShiftDown()) {
                    System.out.println("Shift"+"键被按下了");
                } else if(e.isControlDown()) {
                    System.out.println("Control"+"键被按下了");
                } else {
                    boolean flag = Toolkit.getDefaultToolkit().getLockingKeyState(KeyEvent.VK_CAPS_LOCK);
                    //键入某个键时调用此方法
                    if(flag) {
                        //System.out.println("现在是大写键状态");
                    }
                    else {
                        //System.out.println("现在是小写键状态");
                    }
                    char ch = e.getKeyChar();
                    //System.out.println("输入的字符是"+ch);
                }
            }
 
            @Override
            public void keyPressed(KeyEvent e) {
                //按下某个键时调用此方法
                //System.out.println("Key pressed: " + KeyEvent.getKeyText(e.getKeyCode()));
                gtPanel.keyPressed(KeyEvent.getKeyText(e.getKeyCode()));
            }
 
            @Override
            public void keyReleased(KeyEvent e) {
                //释放某个键时调用此方法
                //System.out.println("Key Released: " + KeyEvent.getKeyText(e.getKeyCode()));
                //System.out.println();
            }
        });

        frame.add(gtPanel);
        frame.setVisible(true);
    }
    
    public static void main(String[] args) {
        //设置输入法
        Locale locale = new Locale("en", "US");
        InputContext context = InputContext.getInstance();
        context.selectInputMethod(locale);
        
        SwingUtilities.invokeLater(GraphicsTest::createAndShowGUI);
    }
}

 

效果：