仿真led led 数字显示 模仿数字显示

import java.awt.Color; import java.awt.Graphics; import java.awt.Polygon; /** * 数码管 */ public class Digital { // 单个字符的默认宽度 private static final int DEFAULT_WIDTH = 50; // 单个字符的默认高度 private static final int DEFAULT_HEIGHT = 90; // 默认背景色 private static final Color DEFAULT_BACKGROUND = Color.BLACK; // 默认前景色 private static final Color DEFAULT_FOREGROUND = Color.RED; private static int bits[][]; private static int polygon[][][]; private Color background; private Color foreground; private int width; private int height; private int gap; private int offset; private Polygon polygonArray[] = new Polygon[9]; static { bits = new int[][] { { '0', 0x03F }, { '1', 0x018 }, { '2', 0x06E }, { '3', 0x07C }, { '4', 0x059 }, { '5', 0x075 }, { '6', 0x077 }, { '7', 0x01C }, { '8', 0x07F }, { '9', 0x07D }, { 'A', 0x05F }, { 'B', 0x073 }, { 'C', 0x027 }, { 'D', 0x07A }, { 'E', 0x067 }, { 'F', 0x047 }, { 'T', 0x184 }, { 'P', 0x04F }, { 'M', 0x19F }, { ':', 0x180 }, { '-', 0x040 }, { -1, 0x0 }, }; int p1[][] = { { 0, 0, 10, 10 }, { 2, 43, 38, 12 } }; int p2[][] = { { 0, 0, 10, 10 }, { 46, 88, 78, 52 } }; int p3[][] = { { 2, 48, 38, 12 }, { 0, 0, 10, 10 } }; int p4[][] = { { 50, 50, 40, 40 }, { 2, 43, 38, 12 } }; int p5[][] = { { 50, 50, 40, 40 }, { 46, 88, 77, 52 } }; int p6[][] = { { 2, 48, 38, 12 }, { 90, 90, 80, 80 } }; int p7[][] = { { 2, 12, 38, 48, 38, 12 }, { 45, 40, 40, 45, 50, 50 } }; int p8[][] = { { 20, 20, 30, 30 }, { 12, 38, 38, 12 } }; int p9[][] = { { 20, 20, 30, 30 }, { 52, 78, 78, 52 } }; polygon = new int[][][] { p1, p2, p3, p4, p5, p6, p7, p8, p9, }; } /** * 创建一个数字管的实例。初始化为默认的宽度、高度、前景色、背景色（50，90， red, black)。 其中的宽度为单个字符的宽度。 */ public Digital() { this(DEFAULT_WIDTH, DEFAULT_HEIGHT); } /** * 创建一个数字管的实例。初始化为指定的宽度、高度和默认的前景色、背景色 (red, black)。 其中的宽度为单个字符的宽度。 */ public Digital(int width, int height) { this(width, height, DEFAULT_FOREGROUND, DEFAULT_BACKGROUND); } /** * 创建一个数字管的实例。初始化为指定的宽度、高度、前景色、背景色。 其中的宽度为单个字符的宽度。 */ public Digital(int width, int height, Color foreground, Color background) { this.width = width; this.height = height; this.foreground = foreground; this.background = background; this.gap = 10; this.offset = 0; for (int i = 0; i < polygonArray.length; ++i) { polygonArray[i] = new Polygon(polygon[i][0], polygon[i][1], polygon[i][0].length); } resetRatio(); } /** * 在指定位置画一个字符串。 * @param g 图形设备 * @param x 起始 X 坐标 * @param y 起始 X 坐标 * @param str 需要绘制的字符串。 */ public void draw(Graphics g, int x, int y, String str) { if (str == null || str.equals("")) { return; } int strCount = str.length(); int strWidth = strCount * width + (strCount - 1) * gap + Math.abs(offset); int rectX = offset > 0 ? x : x + offset; Color oldColor = g.getColor(); g.setColor(background); g.fillRect(rectX, y, strWidth, height); // for (int i = 0; i < str.length(); ++i) { drawChar(g, x, y, str.charAt(i)); x += gap + width; } g.setColor(oldColor); } /** * 在指定位置画一个字符。 * @param g 图形设备 * @param x 起始 X 坐标 * @param y 起始 X 坐标 * @param str 需要绘制的字符。 */ public void drawChar(Graphics g, int x, int y, char ch) { int bits = getBits(ch); for (int i = 0; i < 9; ++i) { if (((bits >> i) & 1) != 0) { drawPloygon(g, polygonArray[i], x, y); } } } /** * 重新设置单个字符的宽度 */ public void setWidth(int w) { this.width = w; resetRatio(); } /** * 重新设置单个字符的高度 */ public void setHeight(int h) { this.height = h; resetRatio(); } /** * 重新设置前景色 */ public void setForeground(Color fg) { foreground = fg; } /** * 重新设置背景色 */ public void setBackground(Color bg) { background = bg; } /** * 设置字符的倾斜偏移 */ public void setOffset(int o) { this.offset = o; resetRatio(); } /** * 设置字符之间的间隔 */ public void setGap(int gap) { this.gap = gap; } private void drawPloygon(Graphics g, Polygon p1, int x, int y) { g.translate(x, y); g.setColor(foreground); g.fillPolygon(p1); g.setColor(background); g.drawPolygon(p1); g.translate(-x, -y); } private int getBits(char ch) { if (ch >= 'a' && ch <= 'z') { ch = (char) ('A' + (ch - 'a')); } bits[bits.length - 1][0] = ch; int i = 0; while (bits[i][0] != ch) { ++i; } return bits[i][1]; } private void resetRatio() { double wRatio = (double) width / (double) DEFAULT_WIDTH; double hRatio = (double) height / (double) DEFAULT_HEIGHT; double offsetRatio = (double) offset / (double) DEFAULT_HEIGHT; for (int j = 0; j < polygonArray.length; ++j) { Polygon p = polygonArray[j]; for (int i = 0; i < p.xpoints.length; ++i) { p.ypoints[i] = (int) (hRatio * polygon[j][1][i]); p.xpoints[i] = (int) (wRatio * polygon[j][0][i]) + (int) (offsetRatio * (height - p.ypoints[i])); } } } }