「java圆形控件」java圆形代码

admin 2023-01-25 16:51:05 501

今天给各位分享java圆形控件的知识，其中也会对java圆形代码进行解释，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、问一个问题，JAVA上可不可以做出来一个圆形的按钮？
2、java 设置了带透明圆形的png图片的圆形按钮后,用setIcon没反应了。
3、JAVA画图板程序，用netbeans做，要求画圆，椭圆，直线，三角形，矩形，可以填充颜色和擦除

问一个问题，JAVA上可不可以做出来一个圆形的按钮？

可以自定义的

贴代码给你看下

import java.awt.Color;

import java.awt.Dimension;

import java.awt.FlowLayout;

import java.awt.Graphics;

import java.awt.Shape;

import java.awt.SystemColor;

import java.awt.event.ActionEvent;

import java.awt.event.ActionListener;

import java.awt.geom.Ellipse2D;

import javax.swing.JButton;

import javax.swing.JFrame;

public class CircleButton extends JButton {

Shape shape;

Color bgColor = SystemColor.control;

public CircleButton() {

this("未命名", null);

}

public CircleButton(String label) {

this(label, null);

}

public CircleButton(String label, Color bgColor) {

super(label); // 调用父类构造方法

if (bgColor != null) {

this.bgColor = bgColor;

}

Dimension size = this.getPreferredSize();

size.width = size.height = Math.max(size.width, size.height);

this.setPreferredSize(size); // 设置宽高等距

this.setContentAreaFilled(false); // 不绘制内容区域

this.setBorderPainted(false); // 不绘制边框

this.setFocusPainted(false); // 不绘制焦点状态

}

protected void paintComponent(Graphics g) {

// 如果鼠标按下，isArmed()方法返回true

if (this.getModel().isArmed()) {

g.setColor(java.awt.SystemColor.controlHighlight);

} else {

g.setColor(java.awt.SystemColor.controlShadow);

g.setColor(this.bgColor); // 设置背景颜色

}

g.fillOval(0, 0, this.getSize().width - 1, this.getSize().height - 1); // 绘制圆形背景区域

g.setColor(java.awt.SystemColor.controlShadow); // 设置边框颜色

g.drawOval(0, 0, this.getSize().width - 1, this.getSize().height - 1); // 绘制边框线

super.paintComponent(g);

}

public boolean contains(int x, int y) {

if ((shape == null) || (!shape.getBounds().equals(this.getBounds()))) {

this.shape = new Ellipse2D.Float(0, 0, this.getWidth(), this

.getHeight());

}

return shape.contains(x, y);

}

class CircleButtonTest {

public static void main(String[] args) {

JFrame jf = new JFrame("自定义按钮");

jf.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);

jf.setSize(350, 280);

jf.setLocationRelativeTo(null);

jf.setLayout(new FlowLayout());

Color arrColor[] = new Color[] { Color.blue, Color.black, Color.red,

Color.yellow, Color.green };

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

CircleButton cb = new CircleButton("圆形按钮" + (i+1),arrColor[i]);

jf.getContentPane().add(cb);

cb.addActionListener(new ActionListener() {

public void actionPerformed(ActionEvent e) {

System.out.println("按钮");

}

});

}

jf.setVisible(true);

}

java 设置了带透明圆形的png图片的圆形按钮后,用setIcon没反应了。

注意使用加上下面两个方法，具体是true，还是false。

我记不清了，你试一试吧。

============================

button.setOpaque(false);

button.setContentAreaFilled(false);

JAVA画图板程序，用netbeans做，要求画圆，椭圆，直线，三角形，矩形，可以填充颜色和擦除

import java.applet.*;

import java.awt.*;

import java.awt.event.*;

import java.util.*;

import javax.swing.*;

import java.awt.geom.*;

import java.io.*;

import java.sql.Connection;

class Point implements Serializable

{

int x,y;

Color col;

int tool;

int boarder;

Point(int x, int y, Color col, int tool, int boarder)

{

this.x = x;

this.y = y;

this.col = col;

this.tool = tool;

this.boarder = boarder;

}

class paintboard extends Frame implements ActionListener,MouseMotionListener,MouseListener,ItemListener

{

int x = -1, y = -1;

int con = 1;//画笔大小

int Econ = 5;//橡皮大小

int toolFlag = 0;//toolFlag:工具标记

//toolFlag工具对应表：

//（0--画笔）；（1--橡皮）；（2--清除）；

//（3--直线）；（4--圆）；（5--矩形）；

Color c = new Color(0,0,0); //画笔颜色

BasicStroke size = new BasicStroke(con,BasicStroke.CAP_BUTT,BasicStroke.JOIN_BEVEL);//画笔粗细

Point cutflag = new Point(-1, -1, c, 6, con);//截断标志

Vector paintInfo = null;//点信息向量组

int n = 1;

FileInputStream picIn = null;

FileOutputStream picOut = null;

ObjectInputStream VIn = null;

ObjectOutputStream VOut = null;

// *工具面板--画笔，直线，圆，矩形，多边形,橡皮，清除*/

Panel toolPanel;

Button eraser, drLine,drCircle,drRect;

Button clear ,pen;

Choice ColChoice,SizeChoice,EraserChoice;

Button colchooser;

Label 颜色,大小B,大小E;

//保存功能

Button openPic,savePic;

FileDialog openPicture,savePicture;

paintboard(String s)

{

super(s);

addMouseMotionListener(this);

addMouseListener(this);

paintInfo = new Vector();

/*各工具按钮及选择项*/

//颜色选择

ColChoice = new Choice();

ColChoice.add("black");

ColChoice.add("red");

ColChoice.add("blue");

ColChoice.add("green");

ColChoice.addItemListener(this);

//画笔大小选择

SizeChoice = new Choice();

SizeChoice.add("1");

SizeChoice.add("3");

SizeChoice.add("5");

SizeChoice.add("7");

SizeChoice.add("9");

SizeChoice.addItemListener(this);

//橡皮大小选择

EraserChoice = new Choice();

EraserChoice.add("5");

EraserChoice.add("9");

EraserChoice.add("13");

EraserChoice.add("17");

EraserChoice.addItemListener(this);

////////////////////////////////////////////////////

toolPanel = new Panel();

clear = new Button("清除");

eraser = new Button("橡皮");

pen = new Button("画笔");

drLine = new Button("画直线");

drCircle = new Button("画圆形");

drRect = new Button("画矩形");

openPic = new Button("打开图画");

savePic = new Button("保存图画");

colchooser = new Button("显示调色板");

//各组件事件监听

clear.addActionListener(this);

eraser.addActionListener(this);

pen.addActionListener(this);

drLine.addActionListener(this);

drCircle.addActionListener(this);

drRect.addActionListener(this);

openPic.addActionListener(this);

savePic.addActionListener(this);

colchooser.addActionListener(this);

颜色 = new Label("画笔颜色",Label.CENTER);

大小B = new Label("画笔大小",Label.CENTER);

大小E = new Label("橡皮大小",Label.CENTER);

//面板添加组件

toolPanel.add(openPic);

toolPanel.add(savePic);

toolPanel.add(pen);

toolPanel.add(drLine);

toolPanel.add(drCircle);

toolPanel.add(drRect);

toolPanel.add(颜色); toolPanel.add(ColChoice);

toolPanel.add(大小B); toolPanel.add(SizeChoice);

toolPanel.add(colchooser);

toolPanel.add(eraser);

toolPanel.add(大小E); toolPanel.add(EraserChoice);

toolPanel.add(clear);

//工具面板到APPLET面板

add(toolPanel,BorderLayout.NORTH);

setBounds(60,60,900,600); setVisible(true);

validate();

//dialog for save and load

openPicture = new FileDialog(this,"打开图画",FileDialog.LOAD);

openPicture.setVisible(false);

savePicture = new FileDialog(this,"保存图画",FileDialog.SAVE);

savePicture.setVisible(false);

openPicture.addWindowListener(new WindowAdapter()

{

public void windowClosing(WindowEvent e)

{ openPicture.setVisible(false); }

});

savePicture.addWindowListener(new WindowAdapter()

{

@Override

public void windowClosing(WindowEvent e)

{ savePicture.setVisible(false); }

});

addWindowListener(new WindowAdapter()

{

public void windowClosing(WindowEvent e)

{ System.exit(0);}

});

}

public void paint(Graphics g)

{

Graphics2D g2d = (Graphics2D)g;

Point p1,p2;

n = paintInfo.size();

if(toolFlag==2)

g.clearRect(0,0,getSize().width,getSize().height);//清除

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

p1 = (Point)paintInfo.elementAt(i);

p2 = (Point)paintInfo.elementAt(i+1);

size = new BasicStroke(p1.boarder,BasicStroke.CAP_BUTT,BasicStroke.JOIN_BEVEL);

g2d.setColor(p1.col);

g2d.setStroke(size);

if(p1.tool==p2.tool)

{

switch(p1.tool)

{

case 0://画笔

Line2D line1 = new Line2D.Double(p1.x, p1.y, p2.x, p2.y);

g2d.draw(line1);

break;

case 1://橡皮

g.clearRect(p1.x, p1.y, p1.boarder, p1.boarder);

break;

case 3://画直线

Line2D line2 = new Line2D.Double(p1.x, p1.y, p2.x, p2.y);

g2d.draw(line2);

break;

case 4://画圆

Ellipse2D ellipse = new Ellipse2D.Double(p1.x, p1.y, Math.abs(p2.x-p1.x) , Math.abs(p2.y-p1.y));

g2d.draw(ellipse);

break;

case 5://画矩形

Rectangle2D rect = new Rectangle2D.Double(p1.x, p1.y, Math.abs(p2.x-p1.x) , Math.abs(p2.y-p1.y));

g2d.draw(rect);

break;

case 6://截断，跳过

i=i+1;

break;

default :

}//end switch

}//end if

}//end for

}

public void itemStateChanged(ItemEvent e)

{

if(e.getSource()==ColChoice)//预选颜色

{

String name = ColChoice.getSelectedItem();

switch (name) {

case "black":

c = new Color(0,0,0);

break;

case "red":

c = new Color(255,0,0);

break;

case "green":

c = new Color(0,255,0);

break;

case "blue":

c = new Color(0,0,255);

break;

}

else if(e.getSource()==SizeChoice)//画笔大小

{

String selected = SizeChoice.getSelectedItem();

switch (selected) {

case "1":

con = 1;