「java绘图课程设计」java程序设计网课

admin 2022-12-31 10:39:11 709

今天给各位分享java绘图课程设计的知识，其中也会对java程序设计网课进行解释，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：

1、如何用java实现画图
2、请问Java课程设计设计一个以图形界面方式输入一个日期，计算出是星期几，这个课程设计在哪本书上可以
3、java课程设计题目及代码是什么？
4、利用Java实现简单绘图功能,具体要求:画直线,画空心或实心椭圆等,,并实现拖动
5、求一个java程序：绘图程序包括画圆，椭圆，线，矩形，自定义。并且可以调图形颜色！

如何用java实现画图

使用Java的Graphics类进行绘图

Graphics类提供基本的几何图形绘制方法，主要有：画线段、画矩形、画圆、画带颜色的图形、画椭圆、画圆弧、画多边形等

请问Java课程设计设计一个以图形界面方式输入一个日期，计算出是星期几，这个课程设计在哪本书上可以

效果图.

解析说明

java 8对时间进行操作,非常的方便

import java.awt.*;

import javax.swing.border.EmptyBorder;

import javax.swing.*;

import java.time.*;

import java.awt.event.*;

//jdk 8版本

public class DayFrame extends JFrame {

private JPanel contentPane;

private JTextField jtfTime;

private JTextField jtfDay;

private static final String[] days = {"一","二","三","四","五","六","日"};

public static void main(String[] args) {

EventQueue.invokeLater(new Runnable() {

public void run() {

try {

DayFrame frame = new DayFrame();

frame.setVisible(true);

} catch (Exception e) {

e.printStackTrace();

}

});

}

public DayFrame() {

setTitle("星期计算器");

setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);

setSize(500,100);

setLocationRelativeTo(null);

contentPane = new JPanel();

contentPane.setBorder(new EmptyBorder(5, 5, 5, 5));

contentPane.setLayout(new BorderLayout(0, 0));

setContentPane(contentPane);

JPanel panel = new JPanel();

contentPane.add(panel, BorderLayout.CENTER);

JLabel label = new JLabel("输入时间:(格式YYYY-MM-DD)");

panel.add(label);

jtfTime = new JTextField();

panel.add(jtfTime);

jtfTime.setColumns(10);

JButton jbJS = new JButton("计算");

jbJS.addActionListener(new ActionListener() {

public void actionPerformed(ActionEvent e) {//计算出时间

String[] t = jtfTime.getText().trim().split("-");

int year = Integer.parseInt(t[0]);

int month = Integer.parseInt(t[1]);

int day = Integer.parseInt(t[2]);

LocalDate time = LocalDate.of(year, month, day);//jdk 8

int n = time.getDayOfWeek().getValue();

jtfDay.setText("星期"+days[n-1]);//显示星期几

}

});

panel.add(jbJS);

jtfDay = new JTextField();

panel.add(jtfDay);

jtfDay.setColumns(10);

}

java课程设计题目及代码是什么？

java课程设计题目及代码分别是：

1、题目：计算器。设计内容是设计一个图形界面（GUI）的计算器应用程序，完成简单的算术运算。

设计要求是设计的计算器应用程序可以完成家法、减法、乘法、除法和取余运算。且有小数点、正负号、求倒数、退格和清零功能。

2、代码：

数字按钮NumberButton类如下：

import java.awt.

import java.awt.event.

import javax.swing.

public class NumberButton extends Button.

{

int number.

public NumberButton(int number).

{

super(""+number).

this.number=number.

setForeground(Color.blue).

}

public int getNumber().

{

return number;

}

其它java课程设计题目及代码是：

题目：华容道。编写一个按钮的子类，使用该子类创建的对象代表华容道中的人物。通过焦点事件控制人物颜色，当人物获得焦点时颜色为蓝色，当失去焦点时颜色为灰色。

通过键盘事件和鼠标事件来实现曹操、关羽等人物的移动。当人物上发生鼠标事件或键盘事件时，如果鼠标指针的位置是在人物的下方（也就是组件的下半部分）或按下键盘的“↓“键，该人物向下移动。向左、向右和向上的移动原理类似。

代码是：

String name[]={"曹操","关羽","张","刘","马","许","兵","兵","兵","兵"}.

for(int i=0;iname.length;i++).

{

person[i]=new Person(i,name[i]).

person[i].addKeyListener(this).

person[i].addMouseListener(this).

// person[i].addFocusListener(new Person).

add(person[i]).

}

person[0].setBounds(104,54,100,100).

person[1].setBounds(104,154,100,50).

person[2].setBounds(54,154,50,100).

person[3].setBounds(204,154,50,100).

person[4].setBounds(54,54,50,100).

person[5].setBounds(204,54,50,100);

person[6].setBounds(54,254,50,50);

person[7].setBounds(204,254,50,50);

person[8].setBounds(104,204,50,50);

person[9].setBounds(154,204,50,50);

利用Java实现简单绘图功能,具体要求:画直线,画空心或实心椭圆等,,并实现拖动

这个是画图

你所谓的拖动是拖动画出来的图形不，如果是，你需要把每次画的图形存在list里

监听鼠标事件，然后从list最后一个找鼠标坐标在图形内的，然后判断鼠标点下和移动后的位置，重新设置所拖动图形的位置，然后repaint

求一个java程序：绘图程序包括画圆，椭圆，线，矩形，自定义。并且可以调图形颜色！

public enum ShapeTypes {

LINE, CIRCLE, RECTANGLE

}

public interface Shape {

void paint(Graphics g);

}

public class Rectangle implements Shape {

// 矩形左上角的坐标

private int x, y;

// 矩形的宽度和高度

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 {

// 直线的起始位置

private int x1, y1;

// 直线的终止位置

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 {

// 圆的颜色

private Color circleColor;

// 圆心的坐标

private int x, y;

// 圆的半径

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);

// 画弧, 当弧的宽度和高度一致且从0~360度时就是原形了

g.drawArc(x, y, radius, radius, 0, 360);

}

public class SketchpadPanel extends Canvas implements MouseListener, MouseMotionListener {

private static final long serialVersionUID = -5229161042153132522L;

// 鼠标点击起始坐标和当前坐标

private int beginX = 0, beginY = 0, currentX = 0, currentY = 0;

// 判断鼠标是否被按下

private boolean isMousePressing = false;

// 保存当前的图形, 在撤销和恢复时使用

private final StackShape currentShapes = new StackShape();

// 保存已经删除过的图形

private final StackShape deletedShapes = new StackShape();

private ShapeTypes type;

private Color color;

public SketchpadPanel() {

addMouseListener(this);

addMouseMotionListener(this);

}

/**

* 撤销方法

public void undo() {

if (currentShapes.size() 0) {

// 从所有保存过的图形中取出最后一个, 放入到已删除的图形中去

Shape shape = currentShapes.pop();

deletedShapes.push(shape);

repaint();

}

/**

* 恢复撤销方法

public void redo() {

if (deletedShapes.size() 0) {

// 从所有删除的图形中取出最后一个, 放入保存的图形中

Shape shape = deletedShapes.pop();

currentShapes.push(shape);

repaint();

}

/**

* 设置命令

* @param type

public void setShapeType(ShapeTypes type) {

this.type = type;

}

/**

* 设置颜色

* @param color

public void setColor(Color color) {

this.color = color;

}

public void updete(Graphics g) {

paint(g);

}

/**

* 绘制画板

@Override

public void paint(Graphics g) {

// 绘制画板

Dimension size = getSize();

int width = size.width;

int height = size.height;

g.setColor(Color.WHITE);

g.fillRect(0, 0, width, height);

// 绘制所有图形

Shape shape = null;

EnumerationShape e = currentShapes.elements();

while (e.hasMoreElements()) {

shape = e.nextElement();

shape.paint(g);

}

// 如果当前鼠标没有释放

if (isMousePressing) {

g.setColor(color);

switch (type) {

// 绘制直线

case LINE:

g.drawLine(beginX, beginY, currentX, currentY);

break;

// 绘制矩形

case RECTANGLE:

if (currentX beginX) {

if (currentY beginY) {

// 如果当前位置在起始位置的左上方, 则以鼠标当前位置为矩形的左上角位置

g.drawRect(currentX, currentY, beginX - currentX, beginY - currentY);

} else {

// 如果当前位置在起始位置的左下方, 则以鼠标当前位置的横坐标和起始位置的纵坐标作为矩形的左上角位置

g.drawRect(currentX, beginY, beginX - currentX, currentY - beginY);

}

} else {

if (currentY beginY) {

// 如果当前位置在起始位置的右上方, 则以鼠标起始位置的很坐标和当前位置的纵坐标作为矩形的左上角位置

g.drawRect(beginX, currentY, currentX - beginX, beginY - currentY);

} else {

// 如果当前位置在起始位置的右下方, 则已起始位置作为矩形的左上叫位置

g.drawRect(beginX, beginY, currentX - beginX, currentY - beginY);

}

break;

// 绘制圆形

case CIRCLE:

// 半径为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) {

}

/**

* 当鼠标按下的时候获得起始坐标

@Override

public void mousePressed(MouseEvent e) {

beginX = e.getX();

beginY = e.getY();

isMousePressing = true;

}

/**

* 当鼠标释放时获得当前坐标

@Override

public void mouseReleased(MouseEvent e) {

currentX = e.getX();

currentY = e.getY();

isMousePressing = false;

// 当释放鼠标时, 将绘制的图形保存到shapes中

switch (type) {

// 绘制直线

case LINE:

Line line = new Line(beginX, beginY, currentX, currentY, color);

currentShapes.push(line);

break;

// 绘制圆形

case CIRCLE:

// 半径为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;

// 绘制矩形

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(); // 存放颜色的面板

private final JPanel mainPanel = new JPanel(); // 主面板

private final JButton redButton = new JButton("红色");

private final JButton blueButton = new JButton("蓝色");

private final JButton greenButton = new JButton("绿色");

private final JButton lineButton = new JButton("直线");

private final JButton circleButton = new JButton("圆");

private final JButton rectangleButton = new JButton("矩形");

private final JButton undoButton = new JButton("撤销");

private final JButton redoButton = new JButton("恢复撤销");

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);

// 初始化设置:颜色和命令

lineButton.setForeground(Color.RED);

sketchPanel.setColor(Color.RED);

redButton.setForeground(Color.RED);

sketchPanel.setShapeType(ShapeTypes.LINE);

}

private void initListener() {

redButton.addActionListener(new ActionListener() {

@Override