「java描边」html描边
今天给各位分享java描边的知识，其中也会对html描边进行解释，如果能碰巧解决你现在面临的问题，别忘了关注本站，现在开始吧！
本文目录一览：
java中五角星怎么用代码去打
=========以下代码抄的
import java.awt.*;
import javax.swing.*;
public class WuJiaoXing extends JPanel {
private static final long serialVersionUID = 1L;
private JFrame frame = null;
private int r = 150; // 外顶点外接圆半径
private int[] x = new int[5]; // 5个X外顶点坐标
private int[] y = new int[5]; // 5个Y外顶点坐标
private int[] x_ = new int[5]; // 5个X内顶点坐标
private int[] y_ = new int[5]; // 5个Y内顶点坐标
public WuJiaoXing() {
this.math();
frame = new JFrame("五角星");
frame.getContentPane().add(this);
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
frame.setSize(500,500);
frame.setLocation(200, 200);
frame.setVisible(true);
}
private void math() {
int c = 360 / 5; // 角度
for (int i = 0; i 5; i++) {
x[i] = (int) (Math.cos(i * c * Math.PI / 30 - Math.PI / 2) * (r) + r);
y[i] = (int) (Math.sin(i * c * Math.PI / 30 - Math.PI / 2) * (r) + r);
}
int r_ = (int) (r * Math.sin(18 * Math.PI / 180) / Math
.sin(126 * Math.PI / 180)); // 内顶点外接圆半径
for (int i = 0; i 5; i++) {
x_[i] = (int) (Math.cos((i * c + 18) * Math.PI / 30 - Math.PI / 2)
* (r_) + r);
y_[i] = (int) (Math.sin((i * c + 18) * Math.PI / 30 - Math.PI / 2)
* (r_) + r);
}
}
public void paint(Graphics g) {
super.paint(g);
g.setColor(Color.YELLOW);
// g.setBackground(Color.RED);
// 填充
int[] x1 = { x[0], x[2], x_[2] };
int[] y1 = { y[0], y[2], y_[2] };
int[] x2 = { x[1], x[3], x_[3] };
int[] y2 = { y[1], y[3], y_[3] };
int[] x3 = { x[2], x[4], x_[4] };
int[] y3 = { y[2], y[4], y_[4] };
g.fillPolygon(x1, y1, 3);
g.fillPolygon(x2, y2, 3);
g.fillPolygon(x3, y3, 3);
// 描边
// g.setColor(Color.BLACK);
// g.drawLine(x[0], y[0], x[2], y[2]);
// g.drawLine(x[0], y[0], x[3], y[3]);
// g.drawLine(x[1], y[1], x[3], y[3]);
// g.drawLine(x[1], y[1], x[4], y[4]);
// g.drawLine(x[2], y[2], x[4], y[4]);
// g.drawLine(x[2], y[2], x[0], y[0]);
}
public static void main(String[] args) {
new WuJiaoXing();
}
}
第二种，用控制台
class Pentagram {
private final char FILL_CHAR; // 填充字符
private final char SPACE_CHAR; // 空档字符
private final int R; // 五角星的外接圆半径
private final float ROTATION; // 五角星逆时针旋转角度
private final int X; // 用于生成画图数组
private final int Y; // 用于生成画图数组
/**
* 构造一个Pentagram对象
*
* @param radius
* 五角星的半径
* @param rotation
* 五角星的逆时针旋转度数
* @param spaceChar
* 画布上空白处填充字符
* @param fillChar
* 画布上线条部分填充字符
*/
public Pentagram(int radius, float rotation, char spaceChar, char fillChar) {
this.R = radius;
this.ROTATION = rotation;
this.FILL_CHAR = fillChar;
this.SPACE_CHAR = spaceChar;
this.X = 2 * R + 1;
this.Y = 2 * R + 1;
}
public char[][] getPentagram() {
char[][] canvas = initCanvas();
Draw draw = new Draw(FILL_CHAR);
// 设五角星的最右边的一个点为 A，逆时针选取点 B~E
// 通过圆的极坐标公式可以得出：
// 得出以下各点的坐标
// A 点坐标(0.951R, 0.309R)
// B 点坐标(0, R)
// C 点坐标(-0.951R, 0.309R)
// D 点坐标(-0.588R, -0.809R)
// E 点坐标(0.588R, -0.809R)
// 画线段CA
draw.drawLine(mcos(162) * R, msin(162) * R, mcos(18) * R, msin(18) * R, canvas);
// 画线段DA
draw.drawLine(mcos(234) * R, msin(234) * R, mcos(18) * R, msin(18) * R, canvas);
// 画线段CE
draw.drawLine(mcos(162) * R, msin(162) * R, mcos(306) * R, msin(306) * R, canvas);
// 画线段DB
draw.drawLine(mcos(234) * R, msin(234) * R, mcos(90) * R, msin(90) * R, canvas);
// 画线段BE
draw.drawLine(mcos(90) * R, msin(90) * R, mcos(306) * R, msin(306) * R, canvas);
return canvas;
}
// 在方形的字符数组中指定两点画线条
// 对图形数组进行初始化，填充空格
private char[][] initCanvas() {
char[][] canvas = new char[Y][X];
for (int i = 0; i Y; i++) {
for (int j = 0; j X; j++) {
canvas[i][j] = SPACE_CHAR;
}
}
return canvas;
}
// 根据角度求正弦值，保留两位小数
private double msin(float a) {
return ((int) (Math.sin(Math.toRadians(a + ROTATION)) * 100)) / 100.0;
}
// 根据角度求余弦值，保留两位小数
private double mcos(float a) {
return ((int) (Math.cos(Math.toRadians(a + ROTATION)) * 100)) / 100.0;
}
}
class Draw {
private char fillChar;
public Draw(char fillChar) {
this.fillChar = fillChar;
}
/**
* 根据两个点画线在二维字符数组上画线
*
* @param x1
* @param y1
* @param x2
* @param y2
* @param canvas
*/
public void drawLine(double x1, double y1, double x2, double y2, char[][] canvas) {
int radius = (canvas.length - 1) / 2;
// 从 x 方向进行填充
if (x1 x2) {
double t = x1;
x1 = x2;
x2 = t;
t = y1;
y1 = y2;
y2 = t;
}
// 获得直线方程的两个系数
double a = (y1 - y2) / (x1 - x2);
double b = y1 - a * x1;
// 根据 x 方向的值求出 y 值，并填充图形
for (int i = (int) Math.round(x1); i = (int) Math.round(x2); i++) {
// 根据直线方程 y = ax + b，求 y
int y = (int) Math.round(a * i + b);
// 因为 y 和 i 算出来的结果有可能是负数，
// 为了采用数组来表示坐标，做了以下变换
// c[R][R] 即为坐标原点
// c[R][0..R] 为 x 方向的负半轴
// c[R][R+1..2*R] 为 x 方向的正半轴
// c[0..R][R] 为 y 方向的正半轴
// c[R+1..2*R][R] 为 y 方向的负半轴
int yy = radius - y;
int xx = radius + i;
yy = yy 0 ? 0 : yy;
yy = yy 2 * radius ? 2 * radius : yy;
xx = xx 0 ? 0 : xx;
xx = xx 2 * radius ? 2 * radius : xx;
canvas[yy][xx] = fillChar;
}
// 从 y 方向进行填充，便于减少间距问题产生的字符空档
if (y1 y2) {
double t = x1;
x1 = x2;
x2 = t;
t = y1;
y1 = y2;
y2 = t;
}
// 根据 y 方向的值求出 x 值，并填充图形
for (int i = (int) Math.round(y1); i = (int) Math.round(y2); i++) {
// 根据 x = (y - b) / a，求 x
int y = (int) Math.round((i - b) / a);
int yy = radius - i;
int xx = radius + y;
yy = yy 0 ? 0 : yy;
yy = yy 2 * radius ? 2 * radius : yy;
xx = xx 0 ? 0 : xx;
xx = xx 2 * radius ? 2 * radius : xx;
canvas[yy][xx] = fillChar;
}
}
/**
* 将画完图之后的画布输出到控制台上
*
* @param canvas
*/
public static void printCanvas(char[][] canvas) {
for (int i = 0; i canvas.length; i++) {
for (int j = 0; j canvas[i].length; j++) {
System.out.print(canvas[i][j]);
}
System.out.println();
}
}
}
public class Test {
public static void main(String[] args) {
// 画一个半径为10，旋转为0，空白为全身空格，填充为★的五角星
Pentagram pen = new Pentagram(10, 0, ' ', '★');
// 在控制台上输出这个五角星
Draw.printCanvas(pen.getPentagram());
}
}
注：其中Pentagram pen = new Pentagram(10, 0, ' ', '★');
10是半径，0是旋转度，' '是以空格表示空格,★是打印的字符。可以自己改
用JAVA写应用程序，绘制一个五角形
import java.awt.*;
import javax.swing.*;
public class Test extends JPanel {
private JFrame frame = null;
private int r = 50; // 外顶点外接圆半径
private int[] x = new int[5]; // 5个X外顶点坐标
private int[] y = new int[5]; // 5个Y外顶点坐标
private int[] x_ = new int[5]; // 5个X内顶点坐标
private int[] y_ = new int[5]; // 5个Y内顶点坐标
public Test() {
this.math();
frame = new JFrame("五角星");
frame.getContentPane().add(this);
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
frame.setSize(300, 200);
frame.setVisible(true);
}
private void math() {
int c = 360 / 5; // 角度
for (int i = 0; i 5; i++) {
x[i] = (int) (Math.cos(i * c * Math.PI / 30 - Math.PI / 2) * (r) + r);
y[i] = (int) (Math.sin(i * c * Math.PI / 30 - Math.PI / 2) * (r) + r);
}
int r_ = (int) (r * Math.sin(18 * Math.PI / 180) / Math.sin(126 * Math.PI / 180)); // 内顶点外接圆半径
for (int i = 0; i 5; i++) {
x_[i] = (int) (Math.cos((i * c + 18) * Math.PI / 30 - Math.PI / 2) * (r_) + r);
y_[i] = (int) (Math.sin((i * c + 18) * Math.PI / 30 - Math.PI / 2) * (r_) + r);
}
}
public void paint(Graphics g) {
super.paint(g);
// 填充
int [] x1 = {x[0], x[2], x_[2]};
int [] y1 = {y[0], y[2], y_[2]};
int [] x2 = {x[1], x[3], x_[3]};
int [] y2 = {y[1], y[3], y_[3]};
int [] x3 = {x[2], x[4], x_[4]};
int [] y3 = {y[2], y[4], y_[4]};
g.fillPolygon(x1, y1, 3);
g.fillPolygon(x2, y2, 3);
g.fillPolygon(x3, y3, 3);
// 描边
g.setColor(new Color(255, 0, 0));
g.drawLine(x[0], y[0], x[2], y[2]);
g.drawLine(x[0], y[0], x[3], y[3]);
g.drawLine(x[1], y[1], x[3], y[3]);
g.drawLine(x[1], y[1], x[4], y[4]);
g.drawLine(x[2], y[2], x[4], y[4]);
g.drawLine(x[2], y[2], x[0], y[0]);
}
public static void main(String[] args) {
new Test();
}
}
如何用Java程序写出五角星?
第一种，用图形
import java.awt.*;
import javax.swing.*;
public class WuJiaoXing extends JPanel {
private static final long serialVersionUID = 1L;
private JFrame frame = null;
private int r = 150; // 外顶点外接圆半径
private int[] x = new int[5]; // 5个X外顶点坐标
private int[] y = new int[5]; // 5个Y外顶点坐标
private int[] x_ = new int[5]; // 5个X内顶点坐标
private int[] y_ = new int[5]; // 5个Y内顶点坐标
public WuJiaoXing() {
this.math();
frame = new JFrame("五角星");
frame.getContentPane().add(this);
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
frame.setSize(500,500);
frame.setLocation(200, 200);
frame.setVisible(true);
}
private void math() {
int c = 360 / 5; // 角度
for (int i = 0; i 5; i++) {
x[i] = (int) (Math.cos(i * c * Math.PI / 30 - Math.PI / 2) * (r) + r);
y[i] = (int) (Math.sin(i * c * Math.PI / 30 - Math.PI / 2) * (r) + r);
}
int r_ = (int) (r * Math.sin(18 * Math.PI / 180) / Math
.sin(126 * Math.PI / 180)); // 内顶点外接圆半径
for (int i = 0; i 5; i++) {
x_[i] = (int) (Math.cos((i * c + 18) * Math.PI / 30 - Math.PI / 2)
* (r_) + r);
y_[i] = (int) (Math.sin((i * c + 18) * Math.PI / 30 - Math.PI / 2)
* (r_) + r);
}
}
public void paint(Graphics g) {
super.paint(g);
g.setColor(Color.YELLOW);
// g.setBackground(Color.RED);
// 填充
int[] x1 = { x[0], x[2], x_[2] };
int[] y1 = { y[0], y[2], y_[2] };
int[] x2 = { x[1], x[3], x_[3] };
int[] y2 = { y[1], y[3], y_[3] };
int[] x3 = { x[2], x[4], x_[4] };
int[] y3 = { y[2], y[4], y_[4] };
g.fillPolygon(x1, y1, 3);
g.fillPolygon(x2, y2, 3);
g.fillPolygon(x3, y3, 3);
// 描边
// g.setColor(Color.BLACK);
// g.drawLine(x[0], y[0], x[2], y[2]);
// g.drawLine(x[0], y[0], x[3], y[3]);
// g.drawLine(x[1], y[1], x[3], y[3]);
// g.drawLine(x[1], y[1], x[4], y[4]);
// g.drawLine(x[2], y[2], x[4], y[4]);
// g.drawLine(x[2], y[2], x[0], y[0]);
}
public static void main(String[] args) {
new WuJiaoXing();
}
}
第二种，用控制台
class Pentagram {
private final char FILL_CHAR; // 填充字符
private final char SPACE_CHAR; // 空档字符
private final int R; // 五角星的外接圆半径
private final float ROTATION; // 五角星逆时针旋转角度
private final int X; // 用于生成画图数组
private final int Y; // 用于生成画图数组
/**
* 构造一个Pentagram对象
*
* @param radius
* 五角星的半径
* @param rotation
* 五角星的逆时针旋转度数
* @param spaceChar
* 画布上空白处填充字符
* @param fillChar
* 画布上线条部分填充字符
*/
public Pentagram(int radius, float rotation, char spaceChar, char fillChar) {
this.R = radius;
this.ROTATION = rotation;
this.FILL_CHAR = fillChar;
this.SPACE_CHAR = spaceChar;
this.X = 2 * R + 1;
this.Y = 2 * R + 1;
}
public char[][] getPentagram() {
char[][] canvas = initCanvas();
Draw draw = new Draw(FILL_CHAR);
// 设五角星的最右边的一个点为 A，逆时针选取点 B~E
// 通过圆的极坐标公式可以得出：
// 得出以下各点的坐标
// A 点坐标(0.951R, 0.309R)
// B 点坐标(0, R)
// C 点坐标(-0.951R, 0.309R)
// D 点坐标(-0.588R, -0.809R)
// E 点坐标(0.588R, -0.809R)
// 画线段CA
draw.drawLine(mcos(162) * R, msin(162) * R, mcos(18) * R, msin(18) * R, canvas);
// 画线段DA
draw.drawLine(mcos(234) * R, msin(234) * R, mcos(18) * R, msin(18) * R, canvas);
// 画线段CE
draw.drawLine(mcos(162) * R, msin(162) * R, mcos(306) * R, msin(306) * R, canvas);
// 画线段DB
draw.drawLine(mcos(234) * R, msin(234) * R, mcos(90) * R, msin(90) * R, canvas);
// 画线段BE
draw.drawLine(mcos(90) * R, msin(90) * R, mcos(306) * R, msin(306) * R, canvas);
return canvas;
}
// 在方形的字符数组中指定两点画线条
// 对图形数组进行初始化，填充空格
private char[][] initCanvas() {
char[][] canvas = new char[Y][X];
for (int i = 0; i Y; i++) {
for (int j = 0; j X; j++) {
canvas[i][j] = SPACE_CHAR;
}
}
return canvas;
}
// 根据角度求正弦值，保留两位小数
private double msin(float a) {
return ((int) (Math.sin(Math.toRadians(a + ROTATION)) * 100)) / 100.0;
}
// 根据角度求余弦值，保留两位小数
private double mcos(float a) {
return ((int) (Math.cos(Math.toRadians(a + ROTATION)) * 100)) / 100.0;
}
}
class Draw {
private char fillChar;
public Draw(char fillChar) {
this.fillChar = fillChar;
}
/**
* 根据两个点画线在二维字符数组上画线
*
* @param x1
* @param y1
* @param x2
* @param y2
* @param canvas
*/
public void drawLine(double x1, double y1, double x2, double y2, char[][] canvas) {
int radius = (canvas.length - 1) / 2;
// 从 x 方向进行填充
if (x1 x2) {
double t = x1;
x1 = x2;
x2 = t;
t = y1;
y1 = y2;
y2 = t;
}
// 获得直线方程的两个系数
double a = (y1 - y2) / (x1 - x2);
double b = y1 - a * x1;
// 根据 x 方向的值求出 y 值，并填充图形
for (int i = (int) Math.round(x1); i = (int) Math.round(x2); i++) {
// 根据直线方程 y = ax + b，求 y
int y = (int) Math.round(a * i + b);
// 因为 y 和 i 算出来的结果有可能是负数，
// 为了采用数组来表示坐标，做了以下变换
// c[R][R] 即为坐标原点
// c[R][0..R] 为 x 方向的负半轴
// c[R][R+1..2*R] 为 x 方向的正半轴
// c[0..R][R] 为 y 方向的正半轴
// c[R+1..2*R][R] 为 y 方向的负半轴
int yy = radius - y;
int xx = radius + i;
yy = yy 0 ? 0 : yy;
yy = yy 2 * radius ? 2 * radius : yy;
xx = xx 0 ? 0 : xx;
xx = xx 2 * radius ? 2 * radius : xx;
canvas[yy][xx] = fillChar;
}
// 从 y 方向进行填充，便于减少间距问题产生的字符空档
if (y1 y2) {
double t = x1;
x1 = x2;
x2 = t;
t = y1;
y1 = y2;
y2 = t;
}
// 根据 y 方向的值求出 x 值，并填充图形
for (int i = (int) Math.round(y1); i = (int) Math.round(y2); i++) {
// 根据 x = (y - b) / a，求 x
int y = (int) Math.round((i - b) / a);
int yy = radius - i;
int xx = radius + y;
yy = yy 0 ? 0 : yy;
yy = yy 2 * radius ? 2 * radius : yy;
xx = xx 0 ? 0 : xx;
xx = xx 2 * radius ? 2 * radius : xx;
canvas[yy][xx] = fillChar;
}
}
/**
* 将画完图之后的画布输出到控制台上
*
* @param canvas
*/
public static void printCanvas(char[][] canvas) {
for (int i = 0; i canvas.length; i++) {
for (int j = 0; j canvas[i].length; j++) {
System.out.print(canvas[i][j]);
}
System.out.println();
}
}
}
public class Test {
public static void main(String[] args) {
// 画一个半径为10，旋转为0，空白为全身空格，填充为★的五角星
Pentagram pen = new Pentagram(10, 0, ' ', '★');
// 在控制台上输出这个五角星
Draw.printCanvas(pen.getPentagram());
}
}
注：其中Pentagram pen = new Pentagram(10, 0, ' ', '★');
10是半径，0是旋转度，' '是以空格表示空格,★是打印的字符。可以自己改
求个JAVA画图程序
//:P.java
//用法，将所有内容保存到文件 P.java 编译运行就行了，鼠标点到哪里，矩形就画到哪里！
import java.awt.*;
import java.awt.event.*;
import javax.swing.*;
public class P {
public static void main(String[] args) {
new FrameX().setVisible(true);
}
}
class FrameX extends JFrame implements ActionListener{
private JComboBox mode,color,radius;
private JPanel menu;
private JButton clear,reset;
private CanvasX canvas;
private int x,y;
private static Color[] cs = {Color.yellow,Color.red,Color.blue,Color.green,};
public FrameX(){
super("画图哦～～呵呵");
this.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
this.setSize(600,400);
this.setLocationRelativeTo(null);
this.mode=new JComboBox(new Object[]{"填充","描边",});
this.color = new JComboBox(new Object[]{"黄","红","蓝","绿",});
this.radius=new JComboBox(new Object[]{"20","35","50","70","100","150",});
this.menu=new JPanel(null);
this.menu.setPreferredSize(new Dimension(1,30));
this.getContentPane().add(menu,"South");
JLabel l = new JLabel("模式：");
l.setSize(40,23);
l.setLocation(10,0);
this.menu.add(l);
this.mode.setBounds(l.getWidth(),0,60,23);
this.menu.add(mode);
this.mode.addActionListener(this);
l = new JLabel("颜色：");
l.setBounds(mode.getX()+mode.getWidth()+10,0,40,23);
this.menu.add(l);
this.color.setBounds(l.getX()+l.getWidth(),0,60,23);
this.color.addActionListener(this);
this.menu.add(color);
l = new JLabel("半径：");
l.setBounds(color.getX()+color.getWidth()+10,0,40,23);
this.menu.add(l);
this.radius.setBounds(l.getX()+l.getWidth(),0,60,23);
this.radius.addActionListener(this);
this.menu.add(radius);
this.reset=new JButton("清除");
this.reset.setBounds(radius.getX()+radius.getWidth()+20,0,78,23);
this.reset.addActionListener(this);
this.menu.add(reset);
this.canvas=new CanvasX();
this.getContentPane().add(canvas,"Center");
this.reset();
}
public void actionPerformed(ActionEvent e) {
Object o = e.getSource();
if(o.equals(reset))reset();
else this.canvas.setShapeX(makeShapeX());
}
private ShapeX makeShapeX() {
int wh = Integer.parseInt(radius.getSelectedItem().toString());
Rectangle r = new Rectangle(0,0,wh,wh);
int mod = this.mode.getSelectedIndex()+1;
Color c = cs[this.color.getSelectedIndex()];
ShapeX s = new ShapeX();
s.bc=c;
s.fc=c;
s.mod=mod;
s.s=r;
return s;
}
private void reset() {
this.canvas.clear();
this.mode.setSelectedIndex(0);
this.color.setSelectedIndex(0);
this.radius.setSelectedIndex(0);
this.canvas.setShapeX(makeShapeX());
}
}
class ShapeX{
Shape s;
int mod;
Color fc,bc;
}
class CanvasX extends Canvas implements MouseListener{
public static final int MODE_FILL=1;
public static final int MODE_DRAW=2;
private ShapeX sx;
public CanvasX(){
this.addMouseListener(this);
}
public void setShapeX(ShapeX x){
this.sx=x;
}
public void clear(){
Graphics g = this.getGraphics();
if(g==null)return;
g.setColor(Color.white);
g.fillRect(0,0,this.getWidth(),this.getHeight());
g.dispose();
sx=null;
}
public void process(int x,int y){
if(sx==null)return;
Rectangle r = (Rectangle)sx.s;
r.setBounds(x-r.width/2,y-r.height/2,r.width,r.height);
Graphics2D g = (Graphics2D)this.getGraphics();
if(sx.mod==MODE_FILL){
g.setColor(sx.fc);
g.fill(sx.s);
}
else if(sx.mod==MODE_DRAW){
g.setColor(sx.bc);
g.draw(sx.s);
}
else if(sx.mod==(MODE_FILL|MODE_DRAW)){
g.setColor(sx.fc);
g.fill(sx.s);
g.setColor(sx.bc);
g.draw(sx.s);
}
g.dispose();
}
public void mouseClicked(MouseEvent e) {}
public void mouseEntered(MouseEvent e) {}
public void mouseExited(MouseEvent e) {}
public void mousePressed(MouseEvent e) {process(e.getX(),e.getY());}
public void mouseReleased(MouseEvent e) {}
}
关于java描边和html描边的介绍到此就结束了，不知道你从中找到你需要的信息了吗 ？如果你还想了解更多这方面的信息，记得收藏关注本站。