用Java繪制圖形
[英]Drawing graphics in Java
問題描述
我試圖在一個正方形的圓邊畫一個圓圈，並在java中有多個方形圓圈。 我差不多完成了，但我的輸出並沒有像我想的那樣出來。 這張照片是我想要做的，但它沒有成功。
這是我的代碼：
a.awt.*;
public class SquaredCircles {
public static final int WIDTH=400;
public static final int HEIGHT=400;
public static void main (String[] args) {
DrawingPanel panel = new DrawingPanel(WIDTH,HEIGHT);
Graphics g = panel.getGraphics ();
panel.setBackground(new Color(0, 255, 255 ) );
int x = 0;
int y = 0;
int size = 100;
int rows = 5;
int numSquares = 1;
drawManySquares ( g, numSquares, x, y, size, rows );
x = 10;
y = 120;
size = 24;
rows = 4;
numSquares = 4;
drawManySquares( g, numSquares, x, y, size, rows );
x = 150;
y = 20;
size = 40;
rows = 6;
numSquares = 5;
drawManySquares( g, numSquares, x, y, size, rows );
x = 130;
y = 275;
size = 36;
rows = 3;
numSquares = 3;
drawManySquares( g, numSquares, x, y, size, rows );
}
public static void drawManySquares( Graphics g, int numSquares, int x, int y, int size, int rows ) {
for ( int i = 0; i < numSquares; i++ ) {
for ( int j = 0; j < numSquares; j++ ) {
drawOneSquare( g, x + i size, y + j size, size, rows );
}
}
}
public static void drawOneSquare( Graphics g, int x, int y, int size, int rows ) {
g.setColor ( Color.GREEN);
g.fillRect(x , y, size, size);
g.setColor ( Color.YELLOW);
g.fillOval ( x, y, size, size);
g.setColor ( Color.BLACK);
g.drawLine(size / 2, x, size / 2, size);
g.setColor ( Color.BLACK);
g.drawLine(x, size / 2, size, size / 2);
for (int i = 0; i <= rows; i = i + 1) {
g.setColor ( Color.BLACK);
g.drawOval(x + (i* (size/rows)), y+ (i*(size/rows)), size - (i*(size/rows +10 )) , size - (i*(size/rows +10)));
}
}
}
1 個解決方案
解決方案1
3 2015-07-28 01:44:00
首先看看AWT中的繪畫和Swing以及執行自定義繪畫 ，看看如何在Swing中完成繪畫
將您的問題分解為可管理的塊。 您需要做的第一件事就是在特定位置繪制一個給定大小的圓圈，例如
public void paintCircleAt(Graphics2D g2d, int radius, int centerX, int centerY, Color stroke, Color fill) {
Ellipse2D.Double circle = new Ellipse2D.Double(centerX - radius, centerY - radius, radius * 2, radius * 2);
g2d.setColor(fill);
g2d.fill(circle);
g2d.setColor(stroke);
g2d.draw(circle);
}
因此，這允許您在x / y的中心點周圍繪制一個給定半徑的圓，並用指定的顏色勾勒出輪廓，非常簡單。
現在，您需要在同一個中心點周圍繪制一系列圓圈，例如......
public void paintCirclesIn(Graphics2D g2d, int count, int radius, int centerX, int centerY, Color stroke, Color fill) {
System.out.println(radius + "; " + centerX + "; " + centerY);
int delta = radius / count;
int innerRadius = radius;
for (int index = 0; index < count; index++, innerRadius -= delta) {
paintCircleAt(g2d, innerRadius, centerX, centerY, stroke, fill);
}
}
好吧，這基本上計算了每個圓與塗料之間的差異（delta），這些塗料與前一個圓的半徑差別很大。 由於繪畫的方式，我們從外圈開始畫畫。
最后，我們需要一些方法畫一個正方形和圓形，類似......
public void paintCirclesInSquare(Graphics2D g2d, int count, int x, int y, int width, int height, Color squareStroke, Color squareFill, Color circleStroke, Color circleFill) {
int centerX = x + (width / 2);
int centerY = y + (height / 2);
int radius = Math.min(centerX, centerY);
Rectangle2D box = new Rectangle2D.Double(x, y, width, height);
g2d.setColor(squareFill);
g2d.fill(box);
g2d.setColor(squareStroke);
g2d.draw(box);
paintCirclesIn(g2d, count, radius, centerX, centerY, circleStroke, circleFill);
g2d.drawLine(centerX, y, centerX, y + height);
g2d.drawLine(x, centerY, x + width, centerY);
}
這再次簡單地重用我們已有的現有代碼並添加到其中，繪制正方形，正方形中的圓圈以及最后的線條。
現在，從這里開始，你可以編寫一個方法，它取你想要的列/行數，x / y位置開始，每個方塊的大小，你需要的圓圈數量和顏色，並重用這個功能，但我會把它留給你;）
可運行的例子讓你玩...
import java.awt.Color;
import java.awt.Dimension;
import java.awt.EventQueue;
import java.awt.Graphics;
import java.awt.Graphics2D;
import java.awt.RenderingHints;
import java.awt.geom.Ellipse2D;
import java.awt.geom.Rectangle2D;
import javax.swing.JFrame;
import javax.swing.JPanel;
import javax.swing.UIManager;
import javax.swing.UnsupportedLookAndFeelException;
public class CirclesAndSquares {
public static void main(String[] args) {
new CirclesAndSquares();
}
public CirclesAndSquares() {
EventQueue.invokeLater(new Runnable() {
@Override
public void run() {
try {
UIManager.setLookAndFeel(UIManager.getSystemLookAndFeelClassName());
} catch (ClassNotFoundException | InstantiationException | IllegalAccessException | UnsupportedLookAndFeelException ex) {
ex.printStackTrace();
}
JFrame frame = new JFrame("Testing");
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
frame.add(new TestPane());
frame.pack();
frame.setLocationRelativeTo(null);
frame.setVisible(true);
}
});
}
public class TestPane extends JPanel {
public TestPane() {
}
@Override
public Dimension getPreferredSize() {
return new Dimension(200, 200);
}
@Override
protected void paintComponent(Graphics g) {
super.paintComponent(g);
Graphics2D g2d = (Graphics2D) g.create();
g2d.setRenderingHint(RenderingHints.KEY_ALPHA_INTERPOLATION, RenderingHints.VALUE_ALPHA_INTERPOLATION_QUALITY);
g2d.setRenderingHint(RenderingHints.KEY_ANTIALIASING, RenderingHints.VALUE_ANTIALIAS_ON);
g2d.setRenderingHint(RenderingHints.KEY_COLOR_RENDERING, RenderingHints.VALUE_COLOR_RENDER_QUALITY);
g2d.setRenderingHint(RenderingHints.KEY_DITHERING, RenderingHints.VALUE_DITHER_ENABLE);
g2d.setRenderingHint(RenderingHints.KEY_FRACTIONALMETRICS, RenderingHints.VALUE_FRACTIONALMETRICS_ON);
g2d.setRenderingHint(RenderingHints.KEY_INTERPOLATION, RenderingHints.VALUE_INTERPOLATION_BILINEAR);
g2d.setRenderingHint(RenderingHints.KEY_RENDERING, RenderingHints.VALUE_RENDER_QUALITY);
g2d.setRenderingHint(RenderingHints.KEY_STROKE_CONTROL, RenderingHints.VALUE_STROKE_PURE);
int x = getWidth() / 2;
int y = getHeight() / 2;
// paintCircleAt(g2d, Math.min(x, y), y, y, Color.BLACK, Color.YELLOW);
// paintCirclesIn(g2d, 5, Math.min(x, y), x, y, Color.BLACK, Color.YELLOW);
paintCirclesInSquare(g2d, 5, 0, 0, getWidth() - 1, getHeight() - 1, Color.BLACK, Color.GREEN, Color.BLACK, Color.YELLOW);
g2d.dispose();
}
public void paintCirclesInSquare(Graphics2D g2d, int count, int x, int y, int width, int height, Color squareStroke, Color squareFill, Color circleStroke, Color circleFill) {
int centerX = x + (width / 2);
int centerY = y + (height / 2);
int radius = Math.min(centerX, centerY);
Rectangle2D box = new Rectangle2D.Double(x, y, width, height);
g2d.setColor(squareFill);
g2d.fill(box);
g2d.setColor(squareStroke);
g2d.draw(box);
paintCirclesIn(g2d, count, radius, centerX, centerY, circleStroke, circleFill);
g2d.drawLine(centerX, y, centerX, y + height);
g2d.drawLine(x, centerY, x + width, centerY);
}
public void paintCirclesIn(Graphics2D g2d, int count, int radius, int centerX, int centerY, Color stroke, Color fill) {
System.out.println(radius + "; " + centerX + "; " + centerY);
int delta = radius / count;
int innerRadius = radius;
for (int index = 0; index < count; index++, innerRadius -= delta) {
paintCircleAt(g2d, innerRadius, centerX, centerY, stroke, fill);
}
}
public void paintCircleAt(Graphics2D g2d, int radius, int centerX, int centerY, Color stroke, Color fill) {
Ellipse2D.Double circle = new Ellipse2D.Double(centerX - radius, centerY - radius, radius * 2, radius * 2);
g2d.setColor(fill);
g2d.fill(circle);
g2d.setColor(stroke);
g2d.draw(circle);
}
}
}
Java圖形繪圖
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