Java 2D-散点图-点不渲染
我已经完成了2D/Swing教程,制作了一个循环运行20次的图表,并在图表中添加了20个不同的点。我的问题是,只有一个点曾经出现过,它总是在x轴上 由于看到我的控制台日志消息,循环运行了20次。循环本身位于代码的底部 我对Java还是相当陌生的,所以任何建议或指针都会很好Java 2D-散点图-点不渲染,java,java-2d,Java,Java 2d,我已经完成了2D/Swing教程,制作了一个循环运行20次的图表,并在图表中添加了20个不同的点。我的问题是,只有一个点曾经出现过,它总是在x轴上 由于看到我的控制台日志消息,循环运行了20次。循环本身位于代码的底部 我对Java还是相当陌生的,所以任何建议或指针都会很好 package scattergraph; import java.awt.BasicStroke; import java.awt.Color; import java.awt.Dimension; import java
package scattergraph;
import java.awt.BasicStroke;
import java.awt.Color;
import java.awt.Dimension;
import java.awt.FontMetrics;
import java.awt.Graphics;
import java.awt.Graphics2D;
import java.awt.Point;
import java.awt.RenderingHints;
import java.awt.Stroke;
import java.util.ArrayList;
import java.util.List;
import java.util.Random;
import javax.swing.JFrame;
import javax.swing.JPanel;
import javax.swing.SwingUtilities;
/**
*
* @author scott
*/
public class ScatterGraph extends JPanel {
private List<Double> scores;
private int padding = 20;
private int labelPadding = 12;
private int numberYDivisions = 6;
private int pointWidth = 10;
private Color gridColor = new Color(200, 200, 200, 200);
private Color pointColor = new Color(255, 0, 255);
private Color lineColor = new Color(255, 255, 253);
private static final Stroke GRAPH_STROKE = new BasicStroke(2f);
public ScatterGraph(List<Double> scores){
this.scores = scores;
}
@Override
protected void paintComponent(Graphics g){
super.paintComponent(g);
Graphics2D g2 = (Graphics2D) g;
g2.setRenderingHint(RenderingHints.KEY_ANTIALIASING, RenderingHints.VALUE_ANTIALIAS_ON);
double xScale = ((double) getWidth() - (3 * padding) - labelPadding) / (scores.size() - 1);
double yScale = ((double) getHeight() - (2 * padding) - labelPadding) / (getMaxScore() - getMinScore());
List<Point> graphPoints = new ArrayList<>();
for(int i = 0; i < scores.size(); i++){
int x1 = (int)(i * xScale + padding + labelPadding);
int y1 = (int)((getMaxScore() - scores.get(i) * yScale) + padding);
graphPoints.add(new Point(x1, y1));
}
g2.setColor(Color.WHITE);
g2.fillRect(padding + labelPadding, padding, getWidth() - (2*padding) - labelPadding, getHeight() - 2 * padding - labelPadding);
g2.setColor(Color.BLUE);
for(int i = 0; i < numberYDivisions + 1; i++){
int x0 = padding + labelPadding;
int x1 = pointWidth + padding + labelPadding;
int y0 = getHeight() - ((i * (getHeight() - padding * 2 - labelPadding)) / numberYDivisions + padding + labelPadding);
int y1 = y0;
if(scores.size() > 0){
g2.setColor(gridColor);
g2.drawLine(padding + labelPadding + 1 + pointWidth, y0, getWidth() - padding, y1);
g2.setColor(Color.BLACK);
String yLabel = ((int) ((getMinScore() + (getMaxScore() - getMinScore()) * ((i * 8.0) / numberYDivisions)) * 100))/ 100.0 + "";
FontMetrics metrics = g2.getFontMetrics();
int labelWidth = metrics.stringWidth(yLabel);
g2.drawString(yLabel, x0 - labelWidth - 6, y0 + (metrics.getHeight() / 2) - 3);
}
g2.drawLine(x0, y0, x1, y1);
}
for (int i = 0; i < scores.size(); i++){
if (scores.size() > 1) {
int x0 = i * (getWidth() - padding * 2 - labelPadding) / (scores.size() - 1) + padding + labelPadding;
int x1 = x0;
int y0 = getHeight() - padding - labelPadding;
int y1 = y0 - pointWidth;
if ((i % ((int) ((scores.size() / 8.0)) + 3)) == 0) {
g2.setColor(gridColor);
g2.drawLine(x0, getHeight() - padding - labelPadding - 1 - pointWidth, x1, padding);
g2.setColor((Color.BLACK));
String xLabel = i + "";
FontMetrics metrics = g2.getFontMetrics();
int labelWidth = metrics.stringWidth(xLabel);
g2.drawString(xLabel, x0 - labelWidth / 2, y0 + metrics.getHeight() + 3);
}
g2.drawLine(x0, y0, x1, y1);
}
}
g2.drawLine(padding + labelPadding, getHeight() - padding - labelPadding, padding + labelPadding, padding);
g2.drawLine(padding + labelPadding, getHeight() - padding - labelPadding, getWidth() - padding, getHeight() - padding - labelPadding);
Stroke oldStroke = g2.getStroke();
g2.setColor(lineColor);
g2.setStroke(GRAPH_STROKE);
for (int i = 0; i < graphPoints.size() - 1; i++){
int x1 = graphPoints.get(i).x;
int y1 = graphPoints.get(i).y;
int x2 = graphPoints.get(i + 1).x;
int y2 = graphPoints.get(i + 1).y;
g2.drawLine(x1, y1, x2, y2);
}
g2.setStroke(oldStroke);
g2.setColor(pointColor);
for (int i = 0; i < graphPoints.size(); i++){
int x = graphPoints.get(i).x - pointWidth / 2;
int y = graphPoints.get(i).y - pointWidth / 2;
int ovalW = pointWidth;
int ovalH = pointWidth;
g2.fillOval(x, y, ovalW, ovalH);
}
}
private double getMinScore(){
double minScore = Double.MAX_VALUE;
for(Double score: scores){
minScore = Math.min(minScore, score);
}
return minScore;
}
private double getMaxScore(){
double maxScore = Double.MIN_VALUE;
for(Double score: scores){
maxScore = Math.min(maxScore, score);
}
return maxScore;
}
public void setScores(List<Double> scores) {
this.scores = scores;
invalidate();
this.repaint();
}
public List<Double> getScores() {
return scores;
}
private static void createAndShowGui(){
List<Double> scores = new ArrayList();
Random random = new Random();
int maxDataPoints = 20;
int maxScore = 8;
for(int i = 0 ; i < maxDataPoints; i++){
scores.add((double)random.nextDouble() * maxScore);
System.out.println("Score added");
}
ScatterGraph mainPanel = new ScatterGraph(scores);
mainPanel.setPreferredSize(new Dimension(700,600));
JFrame frame = new JFrame("My Scatter Graph");
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
frame.getContentPane().add(mainPanel);
frame.pack();
frame.setLocationRelativeTo(null);
frame.setVisible(true);
}
public static void main(String[] args) {
SwingUtilities.invokeLater(new Runnable(){
public void run(){
createAndShowGui();
}
});
}
}
包散点图;
导入java.awt.BasicStroke;
导入java.awt.Color;
导入java.awt.Dimension;
导入java.awt.FontMetrics;
导入java.awt.Graphics;
导入java.awt.Graphics2D;
导入java.awt.Point;
导入java.awt.RenderingHints;
导入java.awt.Stroke;
导入java.util.ArrayList;
导入java.util.List;
导入java.util.Random;
导入javax.swing.JFrame;
导入javax.swing.JPanel;
导入javax.swing.SwingUtilities;
/**
*
*@作者斯科特
*/
公共类散点图扩展JPanel{
私人名单分数;
私有整数填充=20;
私有int-labelPadding=12;
私有整数分割=6;
私有int pointWidth=10;
私有颜色gridColor=新颜色(200200200200200);
私有颜色pointColor=新颜色(255,0,255);
专用颜色lineColor=新颜色(255、255、253);
专用静态最终行程图_行程=新基本行程(2f);
公共散点图(列表分数){
这个分数=分数;
}
@凌驾
受保护组件(图形g){
超级组件(g);
图形2d g2=(图形2d)g;
g2.setRenderingHint(renderingHits.KEY\u ANTIALIASING,renderingHits.VALUE\u ANTIALIAS\u ON);
double-xScale=((double)getWidth()-(3*填充)-labelPadding)/(scores.size()-1);
双Y刻度=((双)getHeight()-(2*填充)-labelPadding)/(getMaxScore()-getMinScore());
List graphPoints=new ArrayList();
对于(int i=0;i0){
g2.设置颜色(网格颜色);
g2.绘制线(padding+labelPadding+1+pointWidth,y0,getWidth()-padding,y1);
g2.设置颜色(颜色为黑色);
字符串yLabel=((int)((getMinScore()+(getMaxScore()-getMinScore())*((i*8.0)/numberYDivisions))*100))/100.0+“”;
FontMetrics=g2.getFontMetrics();
int labelWidth=metrics.stringWidth(yLabel);
g2.拉丝(yLabel,x0-labelWidth-6,y0+(metrics.getHeight()/2)-3);
}
g2.抽绳(x0,y0,x1,y1);
}
对于(int i=0;i1){
int x0=i*(getWidth()-padding*2-labelPadding)/(scores.size()-1)+padding+labelPadding;
int-x1=x0;
int y0=getHeight()-padding-labelPadding;
int y1=y0-点宽度;
如果((i%((int)((scores.size()/8.0))+3))==0){
g2.设置颜色(网格颜色);
g2.绘图线(x0,getHeight()-padding-labelPadding-1-pointWidth,x1,padding);
g2.setColor((Color.BLACK));
字符串xLabel=i+“”;
FontMetrics=g2.getFontMetrics();
int labelWidth=metrics.stringWidth(xLabel);
g2.拉丝(xLabel,x0-labelWidth/2,y0+metrics.getHeight()+3);
}
g2.抽绳(x0,y0,x1,y1);
}
}
g2.抽绳(padding+labelPadding,getHeight()-padding-labelPadding,padding+labelPadding,padding);
g2.抽绳(padding+labelPadding,getHeight()-padding-labelPadding,getWidth()-padding,getHeight()-padding-labelPadding);
Stroke-oldstrope=g2.getStroke();
g2.设置颜色(lineColor);
g2.设定行程(图形_行程);
对于(int i=0;iint y1 = (int) ((getMaxScore() - scores.get(i) * yScale) + padding);
int y1 = (int) (((getMaxScore() - scores.get(i)) * yScale) + padding);
maxScore = Math.min(maxScore, score);
maxScore = Math.max(maxScore, score);