public?class?Test?{
在掇刀等地區(qū),都構(gòu)建了全面的區(qū)域性戰(zhàn)略布局,加強發(fā)展的系統(tǒng)性、市場前瞻性、產(chǎn)品創(chuàng)新能力,以專注、極致的服務(wù)理念,為客戶提供網(wǎng)站設(shè)計、成都網(wǎng)站設(shè)計 網(wǎng)站設(shè)計制作定制網(wǎng)站開發(fā),公司網(wǎng)站建設(shè),企業(yè)網(wǎng)站建設(shè),品牌網(wǎng)站建設(shè),成都全網(wǎng)營銷推廣,成都外貿(mào)網(wǎng)站建設(shè),掇刀網(wǎng)站建設(shè)費用合理。
public?static?void?main(String[]?args)?{
int?height?=8;
int[][]?nums?=?new?int[height][height*2];
for(int?i=0;inums.length;i++)?{
for(int?j=0;jnums[i].length;j++)?{
if(j=i||j=nums[i].length-i-1)?{
nums[i][j]=1;
}
}
}
print(nums);
}
public?static?void?print(int[][]?n)?{
for(int?i=0;in.length;i++)?{
for(int?j=0;jn[i].length;j++)?{
if(n[i][j]==1)?{
System.out.print("*");
}else?{
System.out.print("?");
}
}
System.out.println();
}
}
}
public?enum?ShapeTypes?{
LINE,?CIRCLE,?RECTANGLE
}
public?interface?Shape?{
void?paint(Graphics?g);
}
public?class?Rectangle?implements?Shape?{
//?矩形左上角的坐標
private?int?x,?y;
//?矩形的寬度和高度
private?int?width,?height;
private?Color?rectangleColor;
public?Rectangle()?{
super();
}
public?Rectangle(int?x,?int?y,?int?width,?int?height,?Color?rectangleColor)?{
super();
this.x?=?x;
this.y?=?y;
this.width?=?width;
this.height?=?height;
this.rectangleColor?=?rectangleColor;
}
@Override
public?void?paint(Graphics?g)?{
g.setColor(rectangleColor);
g.drawRect(x,?y,?width,?height);
}
}
public?class?Line?implements?Shape?{
//?直線的起始位置
private?int?x1,?y1;
//?直線的終止位置
private?int?x2,?y2;
private?Color?lineColor;
public?Line(int?x1,?int?y1,?int?x2,?int?y2,?Color?lineColor)?{
super();
this.x1?=?x1;
this.y1?=?y1;
this.x2?=?x2;
this.y2?=?y2;
this.lineColor?=?lineColor;
}
public?Line()?{
super();
}
@Override
public?void?paint(Graphics?g)?{
g.setColor(lineColor);
g.drawLine(x1,?y1,?x2,?y2);
}
}
public?class?Circle?implements?Shape?{
//?圓的顏色
private?Color?circleColor;
//?圓心的坐標
private?int?x,?y;
//?圓的半徑
private?int?radius;
public?Circle()?{
super();
}
public?Circle(int?x,?int?y,?int?radius,?Color?circleColor)?{
super();
this.circleColor?=?circleColor;
this.x?=?x;
this.y?=?y;
this.radius?=?radius;
}
@Override
public?void?paint(Graphics?g)?{
g.setColor(circleColor);
//?畫弧,?當弧的寬度和高度一致且從0~360度時就是原形了
g.drawArc(x,?y,?radius,?radius,?0,?360);
}
}
public?class?SketchpadPanel?extends?Canvas?implements?MouseListener,?MouseMotionListener?{
private?static?final?long?serialVersionUID?=?-5229161042153132522L;
//?鼠標點擊起始坐標和當前坐標
private?int?beginX?=?0,?beginY?=?0,?currentX?=?0,?currentY?=?0;
//?判斷鼠標是否被按下
private?boolean?isMousePressing?=?false;
//?保存當前的圖形,?在撤銷和恢復(fù)時使用
private?final?StackShape?currentShapes?=?new?StackShape();
//?保存已經(jīng)刪除過的圖形
private?final?StackShape?deletedShapes?=?new?StackShape();
private?ShapeTypes?type;
private?Color?color;
public?SketchpadPanel()?{
addMouseListener(this);
addMouseMotionListener(this);
}
/**
?*?撤銷方法
?*/
public?void?undo()?{
if?(currentShapes.size()??0)?{
//?從所有保存過的圖形中取出最后一個,?放入到已刪除的圖形中去
Shape?shape?=?currentShapes.pop();
deletedShapes.push(shape);
repaint();
}
}
/**
?*?恢復(fù)撤銷方法
?*/
public?void?redo()?{
if?(deletedShapes.size()??0)?{
//?從所有刪除的圖形中取出最后一個,?放入保存的圖形中
Shape?shape?=?deletedShapes.pop();
currentShapes.push(shape);
repaint();
}
}
/**
?*?設(shè)置命令
?*?
?*?@param?type
?*/
public?void?setShapeType(ShapeTypes?type)?{
this.type?=?type;
}
/**
?*?設(shè)置顏色
?*?
?*?@param?color
?*/
public?void?setColor(Color?color)?{
this.color?=?color;
}
public?void?updete(Graphics?g)?{
paint(g);
}
/**
?*?繪制畫板
?*/
@Override
public?void?paint(Graphics?g)?{
//?繪制畫板
Dimension?size?=?getSize();
int?width?=?size.width;
int?height?=?size.height;
g.setColor(Color.WHITE);
g.fillRect(0,?0,?width,?height);
//?繪制所有圖形
Shape?shape?=?null;
EnumerationShape?e?=?currentShapes.elements();
while?(e.hasMoreElements())?{
shape?=?e.nextElement();
shape.paint(g);
}
//?如果當前鼠標沒有釋放
if?(isMousePressing)?{
g.setColor(color);
switch?(type)?{
//?繪制直線
case?LINE:
g.drawLine(beginX,?beginY,?currentX,?currentY);
break;
//?繪制矩形
case?RECTANGLE:
if?(currentX??beginX)?{
if?(currentY??beginY)?{
//?如果當前位置在起始位置的左上方,?則以鼠標當前位置為矩形的左上角位置
g.drawRect(currentX,?currentY,?beginX?-?currentX,?beginY?-?currentY);
}?else?{
//?如果當前位置在起始位置的左下方,?則以鼠標當前位置的橫坐標和起始位置的縱坐標作為矩形的左上角位置
g.drawRect(currentX,?beginY,?beginX?-?currentX,?currentY?-?beginY);
}
}?else?{
if?(currentY??beginY)?{
//?如果當前位置在起始位置的右上方,?則以鼠標起始位置的很坐標和當前位置的縱坐標作為矩形的左上角位置
g.drawRect(beginX,?currentY,?currentX?-?beginX,?beginY?-?currentY);
}?else?{
//?如果當前位置在起始位置的右下方,?則已起始位置作為矩形的左上叫位置
g.drawRect(beginX,?beginY,?currentX?-?beginX,?currentY?-?beginY);
}
}
break;
//?繪制圓形
case?CIRCLE:
//?半徑為a*a?+?b*b的平方根
int?radius?=?(int)?Math
.sqrt((beginX?-?currentX)?*?(beginX?-?currentX)?+?(beginY?-?currentY)?*?(beginY?-?currentY));
g.drawArc(beginX?-?radius?/?2,?beginY?-?radius?/?2,?radius,?radius,?0,?360);
break;
}
}
}
@Override
public?void?mouseClicked(MouseEvent?e)?{
}
@Override
public?void?mouseEntered(MouseEvent?e)?{
}
@Override
public?void?mouseExited(MouseEvent?e)?{
}
/**
?*?當鼠標按下的時候獲得起始坐標
?*/
@Override
public?void?mousePressed(MouseEvent?e)?{
beginX?=?e.getX();
beginY?=?e.getY();
isMousePressing?=?true;
}
/**
?*?當鼠標釋放時獲得當前坐標
?*/
@Override
public?void?mouseReleased(MouseEvent?e)?{
currentX?=?e.getX();
currentY?=?e.getY();
isMousePressing?=?false;
//?當釋放鼠標時,?將繪制的圖形保存到shapes中
switch?(type)?{
//?繪制直線
case?LINE:
Line?line?=?new?Line(beginX,?beginY,?currentX,?currentY,?color);
currentShapes.push(line);
break;
//?繪制圓形
case?CIRCLE:
//?半徑為a*a?+?b*b的平方根
int?radius?=?(int)?Math
.sqrt((beginX?-?currentX)?*?(beginX?-?currentX)?+?(beginY?-?currentY)?*?(beginY?-?currentY));
Circle?circle?=?new?Circle(beginX?-?radius?/?2,?beginY?-?radius?/?2,?radius,?color);
currentShapes.push(circle);
break;
//?繪制矩形
case?RECTANGLE:
Rectangle?rectangle?=?null;
if?(currentX??beginX)?{
if?(currentY??beginY)?{
rectangle?=?new?Rectangle(currentX,?currentY,?beginX?-?currentX,?beginY?-?currentY,?color);
}?else?{
rectangle?=?new?Rectangle(currentX,?beginY,?beginX?-?currentX,?currentY?-?beginY,?color);
}
}?else?{
if?(currentY??beginY)?{
rectangle?=?new?Rectangle(beginX,?currentY,?currentX?-?beginX,?beginY?-?currentY,?color);
}?else?{
rectangle?=?new?Rectangle(beginX,?beginY,?currentX?-?beginX,?currentY?-?beginY,?color);
}
}
currentShapes.push(rectangle);
break;
}
repaint();
}
@Override
public?void?mouseDragged(MouseEvent?e)?{
currentX?=?e.getX();
currentY?=?e.getY();
this.repaint();
}
@Override
public?void?mouseMoved(MouseEvent?e)?{
}
}
public?class?SketchpadFrame?extends?JFrame?{
private?static?final?long?serialVersionUID?=?-7080053971741609904L;
private?final?JPanel?commandPanel?=?new?JPanel();?//?存放命令的面板
private?final?JPanel?colorPanel?=?new?JPanel();?//?存放顏色的面板
private?final?JPanel?mainPanel?=?new?JPanel();?//?主面板
private?final?JButton?redButton?=?new?JButton("紅色");
private?final?JButton?blueButton?=?new?JButton("藍色");
private?final?JButton?greenButton?=?new?JButton("綠色");
private?final?JButton?lineButton?=?new?JButton("直線");
private?final?JButton?circleButton?=?new?JButton("圓");
private?final?JButton?rectangleButton?=?new?JButton("矩形");
private?final?JButton?undoButton?=?new?JButton("撤銷");
private?final?JButton?redoButton?=?new?JButton("恢復(fù)撤銷");
private?final?JButton?exitButton?=?new?JButton("退出");
SketchpadPanel?sketchPanel?=?new?SketchpadPanel();
private?void?initFrame()?{
commandPanel.setLayout(new?FlowLayout());
commandPanel.add(lineButton);
commandPanel.add(circleButton);
commandPanel.add(rectangleButton);
commandPanel.add(undoButton);
commandPanel.add(redoButton);
commandPanel.add(exitButton);
colorPanel.setLayout(new?FlowLayout());
colorPanel.add(redButton);
colorPanel.add(blueButton);
colorPanel.add(greenButton);
mainPanel.setLayout(new?BorderLayout());
mainPanel.add(commandPanel,?BorderLayout.NORTH);
mainPanel.add(colorPanel,?BorderLayout.CENTER);
getContentPane().add("South",?mainPanel);
getContentPane().add("Center",?sketchPanel);
//?初始化設(shè)置:顏色和命令
lineButton.setForeground(Color.RED);
sketchPanel.setColor(Color.RED);
redButton.setForeground(Color.RED);
sketchPanel.setShapeType(ShapeTypes.LINE);
}
private?void?initListener()?{
redButton.addActionListener(new?ActionListener()?{
@Override
public?void?actionPerformed(ActionEvent?e)?{
redAction(e);
}
});
blueButton.addActionListener(new?ActionListener()?{
@Override
public?void?actionPerformed(ActionEvent?e)?{
blueAction(e);
}
});
greenButton.addActionListener(new?ActionListener()?{
@Override
public?void?actionPerformed(ActionEvent?e)?{
greenAction(e);
}
});
undoButton.addActionListener(new?ActionListener()?{
@Override
public?void?actionPerformed(ActionEvent?e)?{
undoAction(e);
}
});
redoButton.addActionListener(new?ActionListener()?{
@Override
public?void?actionPerformed(ActionEvent?e)?{
redoAction(e);
}
});
exitButton.addActionListener(new?ActionListener()?{
@Override
public?void?actionPerformed(ActionEvent?e)?{
exitAction(e);
}
});
lineButton.addActionListener(new?ActionListener()?{
@Override
public?void?actionPerformed(ActionEvent?e)?{
lineAction(e);
}
});
circleButton.addActionListener(new?ActionListener()?{
@Override
public?void?actionPerformed(ActionEvent?e)?{
circleAction(e);
}
});
rectangleButton.addActionListener(new?ActionListener()?{
@Override
public?void?actionPerformed(ActionEvent?e)?{
rectangleAction(e);
}
});
}
public?SketchpadFrame()?{
initFrame();
initListener();
this.setSize(500,?600);
setLocationByPlatform(true);
setResizable(true);
}
/*?********************處理事件*********************?*/
private?void?undoAction(ActionEvent?e)?{
sketchPanel.undo();
}
private?void?redoAction(ActionEvent?e)?{
sketchPanel.redo();
}
private?void?exitAction(ActionEvent?e)?{
System.exit(0);
}
private?void?lineAction(ActionEvent?e)?{
//?選中按鈕為紅色,?其余為黑色
lineButton.setForeground(Color.RED);
circleButton.setForeground(Color.BLACK);
rectangleButton.setForeground(Color.BLACK);
sketchPanel.setShapeType(ShapeTypes.LINE);
}
private?void?circleAction(ActionEvent?e)?{
circleButton.setForeground(Color.RED);
lineButton.setForeground(Color.BLACK);
rectangleButton.setForeground(Color.BLACK);
sketchPanel.setShapeType(ShapeTypes.CIRCLE);
}
private?void?rectangleAction(ActionEvent?e)?{
rectangleButton.setForeground(Color.RED);
lineButton.setForeground(Color.BLACK);
circleButton.setForeground(Color.BLACK);
sketchPanel.setShapeType(ShapeTypes.RECTANGLE);
}
private?void?redAction(ActionEvent?e)?{
redButton.setForeground(Color.RED);
blueButton.setForeground(Color.BLACK);
greenButton.setForeground(Color.BLACK);
sketchPanel.setColor(Color.RED);
}
private?void?blueAction(ActionEvent?e)?{
blueButton.setForeground(Color.RED);
redButton.setForeground(Color.BLACK);
greenButton.setForeground(Color.BLACK);
sketchPanel.setColor(Color.BLUE);
}
private?void?greenAction(ActionEvent?e)?{
greenButton.setForeground(Color.RED);
redButton.setForeground(Color.BLACK);
blueButton.setForeground(Color.BLACK);
sketchPanel.setColor(Color.GREEN);
}
}
/**
*?
*?@author?不落的太陽(Sean?Yang)
*?@version?1.0
*?@since?JDK?1.8
*?
*/
public?class?SketchpadMain?{
/**
?*?測試方法
?*?
?*?@param?args命令行參數(shù)
?*/
public?static?void?main(String[]?args)?{
EventQueue.invokeLater(new?Runnable()?{
@Override
public?void?run()?{
JFrame?frame?=?new?SketchpadFrame();
frame.setVisible(true);
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
}
});
}
}
像這種圖形對稱的由少變多再變少可以考慮絕對值控制。
打個比方:就像在一個數(shù)軸上,越接近中心則距離越短,然后過了中心后,就會離中心越來越遠。代碼如下,如果n是可輸入的,你用IO輸入流代替即可。
public static void main(String[] args){
int n = 5;//*號的行數(shù)
/*控制*號的數(shù)量,最小為1,最大為n,由絕對值計算出變化*/
int m = 1;
int space = (n + 1) / 2;//空格的最大值
int s = 1;//和上面同理
for(int i = 0; i n; i++){
//控制空格輸出
for(int j = 0; j Math.abs(space-s); j++){
System.out.print(" ");
}
s++;
//控制*號輸出
for(int k = 0; k n - Math.abs(n - m); k++){
System.out.print("*");
}
m += 2;
System.out.println();
}
}
package epm.mp.gateway.util;
import java.awt.Color;
import java.awt.FlowLayout;
import java.awt.Graphics;
import java.awt.event.ComponentEvent;
import java.awt.event.ComponentListener;
import java.awt.event.ItemEvent;
import java.awt.event.ItemListener;
import javax.swing.JComboBox;
import javax.swing.JFrame;
public class Rose extends JFrame implements ComponentListener, ItemListener {
private JComboBox comboboxColor;
// 顏色組合框
public Rose() {
super("玫瑰線");
this.setSize(600, 400);
this.setDefaultCloseOperation(EXIT_ON_CLOSE);
this.setLayout(new FlowLayout());
Object data[] = { Color.red, Color.green, Color.blue };
comboboxColor = new JComboBox(data);
// 顏色組合框
comboboxColor.addItemListener(this);
// 注冊組合框的選擇事件監(jiān)聽器
this.add(comboboxColor);
this.addComponentListener(this);
// 注冊框架窗口的選擇事件監(jiān)聽器
this.setVisible(true);
this.validate();
}
//r=asin3θ
//轉(zhuǎn)化為直角坐標系
// 輸入下面程序用于輸出三葉玫瑰線的圖形,三葉玫瑰線的參數(shù)方程為:
// x = r * sin(3t)* cos(t);
//y = r *sin(3t) * sin(t)
//其中: 0 = t = 2 * 3.14159
//
public void paint(Graphics g){
paint(g,3);
}
public void paint(Graphics g,int roses) {
int x0, y0;
// 原點坐標
x0 = this.getWidth() / 2;
// 窗口的寬度
y0 = this.getHeight() / 2;
g.setColor((Color) comboboxColor.getSelectedItem());
// 設(shè)置畫線顏色為組合框選中顏色
g.drawLine(x0, 0, x0, y0 * 2);
g.drawLine(0, y0, x0 * 2, y0);
int j = 0;
while (j 200) {
for (int i = 0; i 1023; i++) {
double angle = i * Math.PI / 512;
double radius = j * Math.sin(roses * angle);
int x = (int) Math.round(radius * Math.cos(angle) );
int y = (int) Math.round(radius * Math.sin(angle));
g.fillOval(x0 + x, y0 + y, 1, 1);//畫點
}
j += 10;
}
}
public void itemStateChanged(ItemEvent e) {
// 選中單選按鈕
repaint();
// 重畫
}
public void componentResized(ComponentEvent e) {
// 改變窗口大小時
repaint();
}
public void componentMoved(ComponentEvent e) {
}
public void componentHidden(ComponentEvent e) {
}
public void componentShown(ComponentEvent e) {
}
public static void main(String[] arg) {
new Rose();
}
}
java 輸出菱形代碼:
System.out.print(" ");
for (k = 1; k = 2 * i - 1; k++)
System.out.print("*");
System.out.println("");
}
for (i = 1; i = 4; i++) {
for (j = 1; j = i; j++)
System.out.print(" ");
for (k = 1; k = 9 - 2 * i; k++)
System.out.print("*");
System.out.println("");
}
}
}
繪制算法:
1、分為兩部分,上半部分和下半部分
2、輸出空格部分換個輸出*部分
3、最后一個標簽需要換行
支持一樓,另附上另一方法,利用數(shù)組亦可!方法如下:
聲明數(shù)組String[] array = new String[5];
array[0]="*";
array[1]="**";
array[2]="***";
array[3]="****";
array[4]="*****";
使用一樓仁兄的方法輸出下標0-4的圖形,即 * ** *** **** *****
不換行再倒序輸出一次!
思想:一個需求的滿足有多種方案,在你的題目中,我根據(jù)你的需求,將你的圖形以對稱軸為中心的兩部分,這是數(shù)組中常用的手段,利用對稱進行 正、反 輸出!
示例:
public class HelloJccp {
static String[] array=new String[5];
public static String printXing(){
return "*";
}
// i 為數(shù)組下標
public static String print(int i){
String charector = ""; // 符號變量 *
for(int j=0;j=i;j++){
charector=printXing()+charector;
}
return charector;
}
public static void main(String[] args){
for(int i=0;iarray.length;i++){
array[i] = print(i);
System.out.print(" ");
System.out.print(array[i]);
}
for(int i=array.length-1;i=0;i--){
System.out.print(array[i]);
System.out.print(" ");
}
}
}
當前標題:java對稱線形圖形代碼 線面平行圖形語言
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