請(qǐng)用JAVA代碼制作一個(gè)簡(jiǎn)單的畫板，其中有五角星，且五角星可以調(diào)整大小和旋轉(zhuǎn)

這樣滿足你的要求么

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import?java.awt.Dimension;

import?java.awt.Graphics;

import?java.awt.event.ActionEvent;

import?java.awt.event.ActionListener;

import?javax.swing.JButton;

import?javax.swing.JFrame;

import?javax.swing.JPanel;

public?class?Painter?extends?JFrame{

/**

?*?

?*/

private?static?final?long?serialVersionUID?=?8160427604782702376L;

CanvasPanel?canvas?=?new?CanvasPanel();;

public?Painter()?{

super("Star");

this.add(canvas);

this.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);

this.pack();

this.setResizable(false);

this.setLocationRelativeTo(null);

this.setVisible(true);

}

public?static?void?main(String[]?args)?{

new?Painter();

}

}

class?CanvasPanel?extends?JPanel?implements?ActionListener{

/**

?*?

?*/

private?static?final?long?serialVersionUID?=?-4642528854538741028L;

private?JButton[]?btn?=?new?JButton[4];

private?String[]?btn_name?=?{"+",?"-",?"R",?"L"};

private?int?center_x?=?200,?center_y?=?200,?radius?=?100,?degree?=?0;

public?CanvasPanel()?{

this.setPreferredSize(new?Dimension(400,?500));

this.setLayout(null);

for(int?i?=?0;?i??4;?i++)?{

btn[i]?=?new?JButton(btn_name[i]);

btn[i].setBounds(160?+?i?*?60,?425,?50,?50);

btn[i].addActionListener(this);

this.add(btn[i]);

}

}

@Override

public?void?paintComponent(Graphics?g)?{

super.paintComponent(g);

for(int?i?=?0;?i??5;?i++)?{

g.drawLine(?(int)?(center_x?+?radius?*?Math.sin(Math.toRadians(degree?+?72?*?i))),

(int)?(center_y?-?radius?*?Math.cos(Math.toRadians(degree?+?72?*?i))),

(int)?(center_x?+?radius?*?Math.sin(Math.toRadians(degree?+?72?*?i?+?144))),

(int)?(center_y?-?radius?*?Math.cos(Math.toRadians(degree?+?72?*?i?+?144))));

}

}

public?void?actionPerformed(ActionEvent?e)?{

//?TODO?Auto-generated?method?stub

if(e.getActionCommand()?==?"+")?{

if(radius??200)

radius?+=?2;

repaint();

}?else?if(e.getActionCommand()?==?"-")?{

if(radius??0)

radius?-=?2;

repaint();

}?else?if(e.getActionCommand()?==?"R")?{

degree?=?(degree?+?2)?%?360;

repaint();

}?else?if(e.getActionCommand()?==?"L")?{

degree?=?(degree?-?2)?%?360;

repaint();

}

}

}

用Java 做一個(gè)星星圖案

這段代碼你參考一下。可以運(yùn)行的package common;public class test {

public static void main(String[] args){

Pentagram pen = new Pentagram(10,0,'　','★');

Draw.printCanvas(pen.getPentagram());

}

}// Pentagram.java 五角星類

class Pentagram {

private final char FILL_CHAR; // 填充字符

private final char SPACE_CHAR; // 空檔字符

private final int R; // 五角星的外接圓半徑

private final float ROTATION; // 五角星逆時(shí)針旋轉(zhuǎn)角度

private final int X; // 用于生成畫圖數(shù)組

private final int Y; // 用于生成畫圖數(shù)組 /**

* 構(gòu)造一個(gè)Pentagram對(duì)象

*

* @param radius

* 五角星的半徑

* @param rotation

* 五角星的逆時(shí)針旋轉(zhuǎn)度數(shù)

* @param spaceChar

* 畫布上空白處填充字符

* @param fillChar

* 畫布上線條部分填充字符

*/

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);

// 設(shè)五角星的最右邊的一個(gè)點(diǎn)為 A，逆時(shí)針選取點(diǎn) B~E

// 通過(guò)圓的極坐標(biāo)公式可以得出：

// 得出以下各點(diǎn)的坐標(biāo)

// A 點(diǎn)坐標(biāo)(0.951R, 0.309R)

// B 點(diǎn)坐標(biāo)(0, R)

// C 點(diǎn)坐標(biāo)(-0.951R, 0.309R)

// D 點(diǎn)坐標(biāo)(-0.588R, -0.809R)

// E 點(diǎn)坐標(biāo)(0.588R, -0.809R)

// 畫線段CA

draw.drawLine(mcos(162) * R, msin(162) * R, mcos(18) * R, msin(18) * R,

canvas);

// 畫線段DA

draw.drawLine(mcos(234) * R, msin(234) * R, mcos(18) * R, msin(18) * R,

canvas);

// 畫線段CE

draw.drawLine(mcos(162) * R, msin(162) * R, mcos(306) * R, msin(306)

* R, canvas);

// 畫線段DB

draw.drawLine(mcos(234) * R, msin(234) * R, mcos(90) * R, msin(90) * R,

canvas);

// 畫線段BE

draw.drawLine(mcos(90) * R, msin(90) * R, mcos(306) * R, msin(306) * R,

canvas);

return canvas;

} // 在方形的字符數(shù)組中指定兩點(diǎn)畫線條

// 對(duì)圖形數(shù)組進(jìn)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;

} // 根據(jù)角度求正弦值，保留兩位小數(shù)

private double msin(float a) {

return ((int) (Math.sin(Math.toRadians(a + ROTATION)) * 100)) / 100.0;

} // 根據(jù)角度求余弦值，保留兩位小數(shù)

private double mcos(float a) {

return ((int) (Math.cos(Math.toRadians(a + ROTATION)) * 100)) / 100.0;

}

}// Draw.java 畫圖工具類

class Draw {

private char fillChar; public Draw(char fillChar) {

this.fillChar = fillChar;

} /**

* 根據(jù)兩個(gè)點(diǎn)畫線在二維字符數(shù)組上畫線

*

* @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;

// 從 x 方向進(jìn)行填充

if (x1 x2) {

double t = x1;

x1 = x2;

x2 = t;

t = y1;

y1 = y2;

y2 = t;

}

// 獲得直線方程的兩個(gè)系數(shù)

double a = (y1 - y2) / (x1 - x2);

double b = y1 - a * x1;

// 根據(jù) x 方向的值求出 y 值，并填充圖形

for (int i = (int) Math.round(x1); i = (int) Math.round(x2); i++) {

// 根據(jù)直線方程 y = ax + b，求 y

int y = (int) Math.round(a * i + b);

// 因?yàn)?y 和 i 算出來(lái)的結(jié)果有可能是負(fù)數(shù)，

// 為了采用數(shù)組來(lái)表示坐標(biāo)，做了以下變換

// c[R][R] 即為坐標(biāo)原點(diǎn)

// c[R][0..R] 為 x 方向的負(fù)半軸

// c[R][R+1..2*R] 為 x 方向的正半軸

// c[0..R][R] 為 y 方向的正半軸

// c[R+1..2*R][R] 為 y 方向的負(fù)半軸

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;

}

// 從 y 方向進(jìn)行填充，便于減少間距問(wèn)題產(chǎn)生的字符空檔

if (y1 y2) {

double t = x1;

x1 = x2;

x2 = t;

t = y1;

y1 = y2;

y2 = t;

}

// 根據(jù) y 方向的值求出 x 值，并填充圖形

for (int i = (int) Math.round(y1); i = (int) Math.round(y2); i++) {

// 根據(jù) 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;

}

} /**

* 將畫完圖之后的畫布輸出到控制臺(tái)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();

}

}

}

用3個(gè)for循環(huán)輸出五角星用java寫

char[][] wjx={

{' ',' ',' ',' ','*','\r'},

{' ',' ',' ','*',' ','*','\r'},

{'*',' ','*',' ',' ',' ','*',' ','*','\r'},

{' ','*',' ',' ',' ',' ',' ','*','\r'},

{' ',' ','*',' ',' ',' ','*','\r'},

{' ','*',' ','*',' ','*',' ','*','\r'},

{'*',' ',' ',' ',' ',' ',' ',' ','*','\r'}

};

for(int i=0;i7;i++){

for(int j=0;jwjx[i].length;j++){

System.out.print(wjx[i][j]);

}

}

一個(gè)五角星的JAVA代碼是什么?拜托各位了 3Q

import java.applet.*; import java.awt.*; public class Wjx extends java.applet.Applet implements Runnable{ Thread PaintThread; public void init() { } public void start(){ PaintThread=new Thread(this); PaintThread.start(); } public void stop(){ PaintThread=null; } public void paint(Graphics g){ //變量定義及初始化 int x[], y[], ox, oy, i, j, R, r, w, h; double a, inca, cura; Color c; int cr, cg, cb; inca=2 * Math.PI / 5; x=new int[10]; y=new int[10]; w=getSize().width; h=getSize().height; //五角星 for (i=0; i50; i++){ //隨機(jī)五角星特征 ox=(int)(Math.random() * w); oy=(int)(Math.random() * w); R=(int)(Math.random() * 50); r=(int)(R / 2); a=(int)(Math.random() * 2 * Math.PI / 5); //計(jì)算頂點(diǎn)數(shù)據(jù) for(j=0; j10; j+=2){ cura=a + inca * (j / 2); x[j]=ox + (int)(R * Math.sin(cura)); y[j]=oy + (int)(R * Math.cos(cura)); cura=cura + inca / 2; x[j+1]=ox + (int)(r * Math.sin(cura)); y[j+1]=oy + (int)(r * Math.cos(cura)); } cr=(int)(Math.random() * 255); cg=(int)(Math.random() * 255); cb=(int)(Math.random() * 255); c=new Color(cr, cg, cb); //畫出五角星 g.setColor(c); g.fillPolygon(x, y, 10); } } public void run() { while(PaintThread!=null){ repaint(); try{ Thread.sleep(125); } catch(InterruptedException E){ } } } }

如何用Java程序?qū)懗鑫褰切?

第一種，用圖形

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; // 外頂點(diǎn)外接圓半徑

private int[] x = new int[5]; // 5個(gè)X外頂點(diǎn)坐標(biāo)

private int[] y = new int[5]; // 5個(gè)Y外頂點(diǎn)坐標(biāo)

private int[] x_ = new int[5]; // 5個(gè)X內(nèi)頂點(diǎn)坐標(biāo)

private int[] y_ = new int[5]; // 5個(gè)Y內(nèi)頂點(diǎn)坐標(biāo)

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)); // 內(nèi)頂點(diǎn)外接圓半徑

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);

// 描邊

// 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();

}

}

第二種，用控制臺(tái)

class Pentagram {

private final char FILL_CHAR; // 填充字符

private final char SPACE_CHAR; // 空檔字符

private final int R; // 五角星的外接圓半徑

private final float ROTATION; // 五角星逆時(shí)針旋轉(zhuǎn)角度

private final int X; // 用于生成畫圖數(shù)組

private final int Y; // 用于生成畫圖數(shù)組

/**

* 構(gòu)造一個(gè)Pentagram對(duì)象

*

* @param radius

* 五角星的半徑

* @param rotation

* 五角星的逆時(shí)針旋轉(zhuǎn)度數(shù)

* @param spaceChar

* 畫布上空白處填充字符

* @param fillChar

* 畫布上線條部分填充字符

*/

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);

// 設(shè)五角星的最右邊的一個(gè)點(diǎn)為 A，逆時(shí)針選取點(diǎn) B~E

// 通過(guò)圓的極坐標(biāo)公式可以得出：

// 得出以下各點(diǎn)的坐標(biāo)

// A 點(diǎn)坐標(biāo)(0.951R, 0.309R)

// B 點(diǎn)坐標(biāo)(0, R)

// C 點(diǎn)坐標(biāo)(-0.951R, 0.309R)

// D 點(diǎn)坐標(biāo)(-0.588R, -0.809R)

// E 點(diǎn)坐標(biāo)(0.588R, -0.809R)

// 畫線段CA

draw.drawLine(mcos(162) * R, msin(162) * R, mcos(18) * R, msin(18) * R, canvas);

// 畫線段DA

draw.drawLine(mcos(234) * R, msin(234) * R, mcos(18) * R, msin(18) * R, canvas);

// 畫線段CE

draw.drawLine(mcos(162) * R, msin(162) * R, mcos(306) * R, msin(306) * R, canvas);

// 畫線段DB

draw.drawLine(mcos(234) * R, msin(234) * R, mcos(90) * R, msin(90) * R, canvas);

// 畫線段BE

draw.drawLine(mcos(90) * R, msin(90) * R, mcos(306) * R, msin(306) * R, canvas);

return canvas;

}

// 在方形的字符數(shù)組中指定兩點(diǎn)畫線條

// 對(duì)圖形數(shù)組進(jìn)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;

}

// 根據(jù)角度求正弦值，保留兩位小數(shù)

private double msin(float a) {

return ((int) (Math.sin(Math.toRadians(a + ROTATION)) * 100)) / 100.0;

}

// 根據(jù)角度求余弦值，保留兩位小數(shù)

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;

}

/**

* 根據(jù)兩個(gè)點(diǎn)畫線在二維字符數(shù)組上畫線

*

* @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;

// 從 x 方向進(jìn)行填充

if (x1 x2) {

double t = x1;

x1 = x2;

x2 = t;

t = y1;

y1 = y2;

y2 = t;

}

// 獲得直線方程的兩個(gè)系數(shù)

double a = (y1 - y2) / (x1 - x2);

double b = y1 - a * x1;

// 根據(jù) x 方向的值求出 y 值，并填充圖形

for (int i = (int) Math.round(x1); i = (int) Math.round(x2); i++) {

// 根據(jù)直線方程 y = ax + b，求 y

int y = (int) Math.round(a * i + b);

// 因?yàn)?y 和 i 算出來(lái)的結(jié)果有可能是負(fù)數(shù)，

// 為了采用數(shù)組來(lái)表示坐標(biāo)，做了以下變換

// c[R][R] 即為坐標(biāo)原點(diǎn)

// c[R][0..R] 為 x 方向的負(fù)半軸

// c[R][R+1..2*R] 為 x 方向的正半軸

// c[0..R][R] 為 y 方向的正半軸

// c[R+1..2*R][R] 為 y 方向的負(fù)半軸

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;

}

// 從 y 方向進(jìn)行填充，便于減少間距問(wèn)題產(chǎn)生的字符空檔

if (y1 y2) {

double t = x1;

x1 = x2;

x2 = t;

t = y1;

y1 = y2;

y2 = t;

}

// 根據(jù) y 方向的值求出 x 值，并填充圖形

for (int i = (int) Math.round(y1); i = (int) Math.round(y2); i++) {

// 根據(jù) 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;

}

}

/**

* 將畫完圖之后的畫布輸出到控制臺(tái)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) {

// 畫一個(gè)半徑為10，旋轉(zhuǎn)為0，空白為全身空格，填充為★的五角星

Pentagram pen = new Pentagram(10, 0, ' ', '★');

// 在控制臺(tái)上輸出這個(gè)五角星

Draw.printCanvas(pen.getPentagram());

}

}

注：其中Pentagram pen = new Pentagram(10, 0, ' ', '★');

10是半徑，0是旋轉(zhuǎn)度，' '是以空格表示空格,★是打印的字符。可以自己改

當(dāng)前名稱：java語(yǔ)言五角星代碼,Java畫五角星
文章地址：http://chinadenli.net/article46/hspheg.html

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