任何java包绘制简单的几何形状？
有没有人有任何建议任何lib /包绘制简单的几何，如三角形，方形？ 它可以保存为png格式。
您将需要查看Java 2D API： http ： //docs.oracle.com/javase/tutorial/2d/overview/index.html
此源使用Java 2D API的Graphics2D绘制一些简单的彩色形状。
作为参考，以下是产生的32×32图像。
import java.awt.*; import java.awt.geom.Ellipse2D; import java.awt.geom.GeneralPath; import java.awt.image.BufferedImage; import java.io.File; import javax.imageio.ImageIO; import javax.swing.*; public class SimpleImages { public static BufferedImage getColoredShapeImage( int size, Shape shape, Color color) { BufferedImage bi = new BufferedImage( size, size, BufferedImage.TYPE_INT_ARGB); Graphics2D g = bi.createGraphics(); g.setRenderingHint( RenderingHints.KEY_ANTIALIASING, RenderingHints.VALUE_ANTIALIAS_ON); g.setColor(color); g.fill(shape); g.dispose(); return bi; } public static Shape getPointedShape(int points, int radius) { double angle = Math.PI * 2 / points; GeneralPath p = new GeneralPath(); for (int ii = 0; ii < points; ii++) { double a = angle * ii; double x = (Math.cos(a) * radius) + radius; double y = (Math.sin(a) * radius) + radius; if (ii == 0) { p.moveTo(x, y); } else { p.lineTo(x, y); } } p.closePath(); return p; } public static void main(String[] args) throws Exception { Color[] colors = { Color.RED, Color.GREEN, Color.BLUE, Color.YELLOW }; File f = new File(System.getProperty("user.home")); f = new File(f, "ShapedImages"); f.mkdirs(); for (Color c : colors) { for (int s = 15; s < 31; s += 15) { Shape sh = new Ellipse2D.Double(1, 1, 2 * s, 2 * s); BufferedImage i = getColoredShapeImage((2 * s) + 2, sh, c); String name = "Image" + "0point-" + s + "px-" + c.getRed() + "r-" + c.getGreen() + "g-" + c.getBlue() + "b" + ".png"; File t = new File(f, name); ImageIO.write(i, "png", t); for (int ii = 3; ii < 7; ii++) { sh = getPointedShape(ii, s); i = getColoredShapeImage((2 * s) + 2, sh, c); name = "Image" + ii + "point-" + s + "px-" + c.getRed() + "r-" + c.getGreen() + "g-" + c.getBlue() + "b" + ".png"; t = new File(f, name); ImageIO.write(i, "png", t); } } } Desktop.getDesktop().open(f); } }
界面GeometricShapeImages
/** * Interface for accessing the images seen in * http://stackoverflow.com/a/16052085/418556 */ interface GeometricShapeImages { public static final int BLUE = 0; public static final int GREEN = 1; public static final int RED = 2; public static final int YELLOW = 3; public static final int CIRCLE = 0; public static final int TRIANGLE = 1; public static final int DIAMOND = 2; public static final int PENTAGON = 3; public static final int HEXAGON = 4; /** * Stores a String representation of the URL for the colored shape image. * Can be accessed like GeometricShapeImages.URL[DIAMOND][BLUE] */ public static final String[][] URL = { { // CIRCLE "http://i.stack.imgur.com/gJmeJ.png", // BLUE "http://i.stack.imgur.com/T5uTa.png", // GREEN "http://i.stack.imgur.com/wCF8S.png", // RED "http://i.stack.imgur.com/IHARa.png" // YELLOW }, // END: CIRCLE { // TRIANGLE "http://i.stack.imgur.com/L5DGx.png", // BLUE "http://i.stack.imgur.com/gYxHm.png", // GREEN "http://i.stack.imgur.com/5v2TX.png", // RED "http://i.stack.imgur.com/8BGfi.png" // YELLOW }, // END: TRIANGLE { // DIAMOND "http://i.stack.imgur.com/in9g1.png", // BLUE "http://i.stack.imgur.com/1lgtq.png", // GREEN "http://i.stack.imgur.com/F0JHK.png", // RED "http://i.stack.imgur.com/6ZXhi.png" // YELLOW }, // END: DIAMOND { // PENTAGON "http://i.stack.imgur.com/IucNt.png", // BLUE "http://i.stack.imgur.com/yBOv3.png", // GREEN "http://i.stack.imgur.com/4EVv1.png", // RED "http://i.stack.imgur.com/Lqkl0.png" // YELLOW }, // END: PENTAGON { // HEXAGON "http://i.stack.imgur.com/yoKxT.png", // BLUE "http://i.stack.imgur.com/zJ8am.png", // GREEN "http://i.stack.imgur.com/xj49g.png", // RED "http://i.stack.imgur.com/c67nr.png" // YELLOW } // END: HEXAGON }; }