泊松分布-JAVA程序图形界面化

package com.poisson; import javax.swing.*; import java.awt.*; /** * 画坐标Service */ public class PaintCoordinateService { private static final int X = 680; private static final int Y = 30; private static final int WIDTH = 800; private static final int HEIGHT = 600; public static void paintCoordinate(Double[] xNumberArray, Double[] yNumberArray) { StringBuffer logBuffer = new StringBuffer("paintCoordinate: \n"); for (int i = 0; i < xNumberArray.length; i++) { logBuffer.append("(").append(xNumberArray[i]).append(",").append(yNumberArray[i]).append(") - ").append(i).append("\n"); } System.err.println(logBuffer); MyPanel myPanel = new MyPanel(xNumberArray, yNumberArray); myPanel.setBorder(BorderFactory.createTitledBorder("绘制图像区")); myPanel.setBounds(X, Y, WIDTH, HEIGHT); PoissonFrame.getFrame().add(myPanel); PoissonFrame.getFrame().repaint(); } private static class MyPanel extends JScrollPane { private static final int X_START = 100; private static final int X_END = 570; private static final int ARROW_LENGTH = 10; private static final int Y_START = 570; private static final int Y_END = 30; private static final int X_LENGTH = X_END - X_START; private static final int Y_LENGTH = Y_START - Y_END; private static final int NUMBER_LENGTH = 10; private static final double X_SCALE_MIN_UNIT = 0.0000001; private static final int X_SCALE_INCREASE_FACTOR_5 = 5; private static final int X_SCALE_INCREASE_FACTOR_2 = 2; private static final int X_SCALE_NUM = 5; private static final int X_SCALE_UNIT_LENGTH = 10; private static final int X_SCALE_DIGITAL_HEIGHT = 15; private static final double Y_SCALE_MIN_UNIT = 0.0000001; private static final int Y_SCALE_INCREASE_FACTOR_5 = 5; private static final int Y_SCALE_INCREASE_FACTOR_2 = 2; private static final int Y_SCALE_NUM = 5; private static final int Y_SCALE_UNIT_LENGTH = 10; private static final int Y_SCALE_DIGITAL_HEIGHT = 40; private static boolean init = false; private Double[] xNumberArray; private Double[] yNumberArray; private Double xMaxNumber; private Double yMaxNumber; public MyPanel(Double[] xNumberArray, Double[] yNumberArray) { this.xNumberArray = xNumberArray; this.yNumberArray = yNumberArray; for (int i = 0; i < xNumberArray.length; i++) { if (xMaxNumber == null || xMaxNumber < xNumberArray[i]) { xMaxNumber = xNumberArray[i]; } } for (int i = 0; i < yNumberArray.length; i++) { if (yMaxNumber == null || yMaxNumber < yNumberArray[i]) { yMaxNumber = yNumberArray[i]; } } } @Override public void paintComponent(Graphics g) { if (init) { System.err.println("paintComponent init=true,ignore"); PoissonFrame.getFrame().repaint(); // return; } init = true; super.paintComponent(g); Graphics2D g2D = (Graphics2D) g; Color c = new Color(200, 70, 0); g2D.setColor(c); /** * 画X轴 */ g2D.drawLine(X_START, Y_START, X_END, Y_START); /** * 画Y轴 */ g2D.drawLine(X_START, Y_START, X_START, Y_END); /** * 画X轴上箭头 */ g2D.drawLine(X_END, Y_START, X_END - ARROW_LENGTH, Y_START - ARROW_LENGTH); /** * 画X轴下箭头 */ g2D.drawLine(X_END, Y_START, X_END - ARROW_LENGTH, Y_START + ARROW_LENGTH); /** * 画Y轴左箭头 */ g2D.drawLine(X_START, Y_END, X_START - ARROW_LENGTH, Y_END + ARROW_LENGTH); /** * 画Y轴右箭头 */ g2D.drawLine(X_START, Y_END, X_START + ARROW_LENGTH, Y_END + ARROW_LENGTH); /** * 画原点 */ g2D.drawString( "0", X_START - NUMBER_LENGTH, Y_START + NUMBER_LENGTH); double xUnit = Double.valueOf(X_LENGTH) / xMaxNumber; double yUnit = Double.valueOf(Y_LENGTH) / yMaxNumber; /** * 把相邻的两个点连线 */ for (int i = 0; i < xNumberArray.length - 1; i++) { System.err.printf("paintComponent g2D.drawLine(%s,%s,%s,%s) \n", X_START + (int) (xNumberArray[i] * xUnit), Y_START - (int) (yNumberArray[i] * yUnit), X_START + (int) (xNumberArray[i + 1] * xUnit), Y_START - (int) (yNumberArray[i + 1] * yUnit)); g2D.drawLine(X_START + (int) (xNumberArray[i] * xUnit), Y_START - (int) (yNumberArray[i] * yUnit), X_START + (int) (xNumberArray[i + 1] * xUnit), Y_START - (int) (yNumberArray[i + 1] * yUnit)); g2D.drawLine(1200, 400, 1300, 500); } System.err.printf("paintComponent xUnit=%s,yUnit=%s,xMaxNumber=%s,yMaxNumber=%s \n", xUnit, yUnit, xMaxNumber, yMaxNumber); /** * 计算合适的X轴刻度 */ Double xScaleUnit = X_SCALE_MIN_UNIT; int currentXScaleIncreaseFactor = X_SCALE_INCREASE_FACTOR_5; while (true) { if (xMaxNumber / X_SCALE_NUM < xScaleUnit) { break; } xScaleUnit = xScaleUnit * currentXScaleIncreaseFactor; currentXScaleIncreaseFactor = currentXScaleIncreaseFactor == X_SCALE_INCREASE_FACTOR_5 ? X_SCALE_INCREASE_FACTOR_2 : X_SCALE_INCREASE_FACTOR_5; } currentXScaleIncreaseFactor = currentXScaleIncreaseFactor == X_SCALE_INCREASE_FACTOR_5 ? X_SCALE_INCREASE_FACTOR_2 : X_SCALE_INCREASE_FACTOR_5; xScaleUnit = xScaleUnit / currentXScaleIncreaseFactor; System.err.printf("paintComponent xScaleUnit=%s \n", xScaleUnit); /** * 计算合适的Y轴刻度 */ Double yScaleUnit = Y_SCALE_MIN_UNIT; int currentYScaleIncreaseFactor = Y_SCALE_INCREASE_FACTOR_5; while (true) { if (yMaxNumber / Y_SCALE_NUM < yScaleUnit) { break; } yScaleUnit = yScaleUnit * currentYScaleIncreaseFactor; currentYScaleIncreaseFactor = currentYScaleIncreaseFactor == Y_SCALE_INCREASE_FACTOR_5 ? Y_SCALE_INCREASE_FACTOR_2 : Y_SCALE_INCREASE_FACTOR_5; } currentXScaleIncreaseFactor = currentXScaleIncreaseFactor == X_SCALE_INCREASE_FACTOR_5 ? X_SCALE_INCREASE_FACTOR_2 : X_SCALE_INCREASE_FACTOR_5; yScaleUnit = yScaleUnit / currentXScaleIncreaseFactor; System.err.printf("paintComponent yScaleUnit=%s \n", yScaleUnit); /** * 画X轴的刻度 */ Double xScaleUnitLength = (X_LENGTH / xMaxNumber) * xScaleUnit; int xTimes = 0; while (true) { if (xScaleUnit * xTimes > xMaxNumber) { break; } if (xTimes == 0) { xTimes++; continue; } String xScaleText = prettifyScaleText(String.valueOf((xScaleUnit >= 1 ? xScaleUnit.intValue() : xScaleUnit) * xTimes)); System.err.printf("paintComponent paint xScale=%s \n", xScaleText