随机圈JAVA [英] Random circles JAVA
本文介绍了随机圈JAVA的处理方法，对大家解决问题具有一定的参考价值，需要的朋友们下面随着小编来一起学习吧！
问题描述
我正在尝试创建一个图形用户界面，用于绘制圈数，并将它们绘制到随机位置/大小的drawPanel中。在我的actionListener上，当我尝试绘制圆时，它会在我的drawOval中给出红线
第一类：
import java.awt.BorderLayout;
import java.awt.Color;
import java.awt.Dimension;
import java.awt.FlowLayout;
import java.awt.Graphics;
import java.awt.GridLayout;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.util.Random;
import javax.swing.BorderFactory;
import javax.swing.JButton;
import javax.swing.JPanel;
import javax.swing.JTextArea;
/ **
*
* @作者Chris
*
* /
公共类CirclesPanel扩展JPanel {
private JButton绘制，清晰;
private JTextArea textArea;
私人JPanel面板，drawPanel，buttonPanel;
private int count;
$ b $ / **构造函数
*构建框架
* /
public CirclesPanel（）{
//创建按钮和textArea
draw = new JButton（Draw）;
clear = new JButton（Clear）;
textArea = new JTextArea（1,10）;
textArea.setBorder（BorderFactory.createTitledBorder（Circles））;
//创建面板
JPanel面板= new JPanel（）;
panel.setLayout（new BorderLayout（））;
setPreferredSize（new Dimension（620，425））;
//创建子面板drawPanel
JPanel drawPanel = new JPanel（）;
drawPanel.setPreferredSize（new Dimension（450,400））;
drawPanel.setBackground（Color.BLACK）;
//创建子面板buttonPanel
JPanel buttonPanel = new JPanel（）;
buttonPanel.setLayout（new GridLayout（3,1））;
//将所有内容添加到框架
add（panel）;
add（buttonPanel，BorderLayout.WEST）;
add（drawPanel，BorderLayout.EAST）;
buttonPanel.add（textArea）;
buttonPanel.add（draw）;
buttonPanel.add（clear）;
//读取单击绘图按钮
draw.addActionListener（new ActionListener（）{
public void actionPerformed（ActionEvent e）
{
count = Integer.parseInt（textArea.getText（））; //获取
中的计数repaint（）; //重新绘制图片以添加圆圈
}
}）;
//读取清除按钮被点击
clear.addActionListener（new ActionListener（）{
public void actionPerformed（ActionEvent e）
{
count = 0; //将计数设置为0因此没有任何内容被绘制
repaint（）; //重新绘制窗口
}
}）;
$ b / **绘制组件
*绘制随机圆圈
* /
public void paintComponent（Graphics g）{
Random generator = new Random（）;
int x，y，直径;
for（int i = 0; i< count; i ++）{//循环接受计数并执行此操作x次
g.setColor（Color.BLUE）; //设置颜色到蓝色
x = generator.nextInt（90）; //随机位置为x
y = generator.nextInt（90）; //随机位置为y
diameter = generator.nextInt（30） ; //随机大小
g.fillOval（x，y，diameter，diameter）; //绘制圆形
}
}
}
第二课程
import javax。 swing.JFrame;
public class Circle {
public static void main（String [] args）{
JFrame frame = new JFrame（Cicles HW9）;
frame.setDefaultCloseOperation（JFrame.EXIT_ON_CLOSE）;
frame.getContentPane（）。add（new CirclesPanel（））;
frame.pack（）;
frame.setVisible（true）;
$ b
解决方案
当您点击按钮时，您想在 drawPanel 上绘制一些随机圆圈 。我给你写了一个简体版，以显示工作情况。
drawButton 和 > paintPanel 让事情变得简单。 public class PaintFrame extends JFrame {
private JPanel content = new JPanel（）;
private JButton drawButton = new JButton（Draw）;
private PaintPanel paintPanel = new PaintPanel（）;
public PaintFrame（）{
getContentPane（）。add（content）;
content.setLayout（new BorderLayout（））;
drawButton.setSize（100，500）;
drawButton.addActionListener（new ActionListener（）{
@Override
public void actionPerformed（ActionEvent e）{
// drawButton被触发，重新绘制paintPanel
paintPanel.repaint（）;
}
}）;
content.add（drawButton，BorderLayout.WEST）;
content.add（paintPanel，BorderLayout.CENTER）;
}
}
您需要一个新的类来扩展JPanel并重写 paintComponent 方法为您完成绘画作业。这确保您正在绘制面板。
class PaintPanel扩展JPanel {
$ b $ public PaintPanel（）{
setSize（500， 500）;
setBackground（Color.BLACK）;
@Override
protected void paintComponent（Graphics g）{
super.paintComponent（g）;
Random random = new Random（）;
g.setColor（Color.WHITE）;
//绘制5个随机圆圈
int count = 5; （250），
random.nextInt（250），
（int i = 0; i
$ b $ / code $ / pre
$ b $主要类
public class DrawMain {
public static void main（String [] args）{
JFrame frame = new PaintFrame（）;
frame.setDefaultCloseOperation（PaintFrame.EXIT_ON_CLOSE）;
frame.setSize（600，500）;
frame.setVisible（true）;
}
}
I am trying to create a GUI that will take in the number of circles to draw, and draw them in drawPanel with random locations/sizes. On my actionListener, when I try to draw the circle, it gives me red lines on my drawOval
1st class:
import java.awt.BorderLayout;
import java.awt.Color;
import java.awt.Dimension;
import java.awt.FlowLayout;
import java.awt.Graphics;
import java.awt.GridLayout;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.util.Random;
import javax.swing.BorderFactory;
import javax.swing.JButton;
import javax.swing.JPanel;
import javax.swing.JTextArea;
/**
*
* @author Chris
*
*/
public class CirclesPanel extends JPanel{
private JButton draw, clear;
private JTextArea textArea;
private JPanel panel, drawPanel, buttonPanel;
private int count;
/**constructor
* builds the frame
*/
public CirclesPanel(){
//creates buttons and textArea
draw = new JButton("Draw");
clear = new JButton("Clear");
textArea = new JTextArea(1,10);
textArea.setBorder(BorderFactory.createTitledBorder("Circles"));
//creats panel
JPanel panel = new JPanel();
panel.setLayout(new BorderLayout());
setPreferredSize(new Dimension(620, 425));
//creates subpanel drawPanel
JPanel drawPanel = new JPanel();
drawPanel.setPreferredSize(new Dimension(450,400));
drawPanel.setBackground(Color.BLACK);
//creates subpanel buttonPanel
JPanel buttonPanel = new JPanel();
buttonPanel.setLayout(new GridLayout(3,1));
//adds all the content to the frame
add(panel);
add(buttonPanel, BorderLayout.WEST);
add(drawPanel, BorderLayout.EAST);
buttonPanel.add(textArea);
buttonPanel.add(draw);
buttonPanel.add(clear);
//reads if the draw button is clicked
draw.addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent e)
{
count =Integer.parseInt(textArea.getText());//takes the count in
repaint();//repaints the picture to add the circles
}
});
//reads if the clear button is clicked
clear.addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent e)
{
count=0;//sets the count to 0 so nothing is painted
repaint();//repaints the window
}
});
}
/**Paint component
* draws the random circles
*/
public void paintComponent(Graphics g) {
Random generator = new Random();
int x, y, diameter;
for(int i = 0; i < count; i++){ //loop that takes the count and does this "x" times
g.setColor(Color.BLUE);//sets color to blue
x = generator.nextInt(90);//random location for x
y = generator.nextInt(90);//random location for y
diameter = generator.nextInt(30);//random size
g.fillOval(x, y, diameter, diameter);//draws the circle
}
}
}
2nd class
import javax.swing.JFrame;
public class Circles {
public static void main(String[]args){
JFrame frame = new JFrame("Cicles HW9");
frame.setDefaultCloseOperation (JFrame.EXIT_ON_CLOSE);
frame.getContentPane().add(new CirclesPanel());
frame.pack();
frame.setVisible(true);
}
}
解决方案 What you want to do is drawing some random circles on the drawPanel when button clicked. I write you a simplified version to show how things work.
I only keep the drawButton and paintPanel to keep things simple.
public class PaintFrame extends JFrame {
private JPanel content = new JPanel();
private JButton drawButton = new JButton("Draw");
private PaintPanel paintPanel = new PaintPanel();
public PaintFrame() {
getContentPane().add(content);
content.setLayout(new BorderLayout());
drawButton.setSize(100, 500);
drawButton.addActionListener(new ActionListener() {
@Override
public void actionPerformed(ActionEvent e) {
// drawButton is fired, repaint the paintPanel
paintPanel.repaint();
}
});
content.add(drawButton, BorderLayout.WEST);
content.add(paintPanel, BorderLayout.CENTER);
}
}
You need a new class extending the JPanel and override the paintComponent method to do the paint job for you. This makes sure you are drawing on the panel.
class PaintPanel extends JPanel {
public PaintPanel() {
setSize(500, 500);
setBackground(Color.BLACK);
}
@Override
protected void paintComponent(Graphics g) {
super.paintComponent(g);
Random random = new Random();
g.setColor(Color.WHITE);
// draw 5 random circles
int count = 5;
for (int i = 0; i < count; i++) {
g.drawOval(random.nextInt(250), random.nextInt(250),
random.nextInt(250), random.nextInt(250));
}
}
}
Main class
public class DrawMain {
public static void main(String[] args) {
JFrame frame = new PaintFrame();
frame.setDefaultCloseOperation(PaintFrame.EXIT_ON_CLOSE);
frame.setSize(600, 500);
frame.setVisible(true);
}
}
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