java代码放大 编程放大代码和缩小代码

求java编程实现一个正方形放大缩小的代码

package bdzhidao;

创新互联科技有限公司专业互联网基础服务商,为您提供四川电信科技城机房高防服务器租用,成都IDC机房托管,成都主机托管等互联网服务。

import java.awt.*;

import javax.swing.*;

public class Square extends JFrame{

public static void main(String[] args){

JFrame frame=new JFrame("可变正方形");

Spanel jp=new Spanel();

frame.add(jp);

frame.setSize(1366,768);

frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);

frame.setResizable(true);

frame.setLocation(0,0);

frame.setVisible(true);

}

}

class Spanel extends JPanel{

int x=640;

int Width=8;

protected void paintComponent(Graphics g){

super.paintComponent(g);

g.setColor(new Color(10,200,40));

try{

Thread.sleep(1000);

}catch(InterruptedException e){

}

g.drawRect(x-=20,x-=20,Width+=10,Width+=10);

if(x=0){

System.exit(0);//当正方形移到屏幕里面时关闭程序,如果没有该语句则最后屏幕会变成绿色

}

repaint();

}

}

//缩小就只需要把相关数据更改一下就OK了,希望对你有帮助!

//其实就是利用线程不断重新画图

求Java编一个放大缩小一个字符串的代码?

给你一个简单的例子import java.awt.Dimension;

import java.awt.Font;

import java.awt.Graphics;

import java.awt.Graphics2D;

import java.awt.Toolkit;

import java.awt.event.ActionEvent;

import java.awt.event.ActionListener;

import javax.swing.JButton;

import javax.swing.JFrame;

import javax.swing.JOptionPane;

import javax.swing.JPanel;

import javax.swing.JPopupMenu;

public class ImageDemo extends JFrame {

/**

*

*/

private static final long serialVersionUID = 1L;

private JPanel panel;

private int size = 14;

public ImageDemo() {

super("test");

setVisible(true);// 显示

Dimension d = Toolkit.getDefaultToolkit().getScreenSize();// 屏幕大小

setBounds((d.width - 300) / 2, (d.height - 200) / 2, 300, 200);// 大小,定位

setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);// 关闭方式

setLayout(null);

JButton b1 = new JButton("放大");

b1.addActionListener(new ActionListener() {

public void actionPerformed(ActionEvent e) {

if(size = 46){

size += 2;

}else{

JOptionPane.showMessageDialog(null, "字体达到最大值");

}

panel.repaint();

}

});

b1.setBounds(75, 2, 150, 30);

JButton b2 = new JButton("缩小");

b2.addActionListener(new ActionListener() {

public void actionPerformed(ActionEvent e) {

if(size = 12){

size -= 2;

}else{

JOptionPane.showMessageDialog(null, "字体达到最小值");

}

panel.repaint();

}

});

b2.setBounds(75, 90, 150, 30);

setPanel();

panel.setBounds(0, 40, 300, 50);

add(b1);

add(panel);

add(b2);

validate();

JPanel pane = (JPanel) this.getContentPane();

pane.updateUI();

}

private void setPanel() {

panel = new JPanel() {

private static final long serialVersionUID = 1L;

@Override

public void paint(Graphics g) {

super.paint(g);

Graphics2D g2D = (Graphics2D) g;

g2D.setFont(new Font("", Font.BOLD, size));

String intNumber = "这是一个简单的JFrame";

g2D.drawString(intNumber, 70, 32);

}

};

}

public static void main(String[] args) {

new ImageDemo();

}

}

如何用Java实现图形的放大和缩小

java实现图形的放大和缩小,其实就是在画图时,改变图片的长和宽。以下代码参考一下:

import java.awt.Graphics;

import java.awt.MouseInfo;

import java.awt.Point;

import java.awt.event.ActionEvent;

import java.awt.event.ActionListener;

import java.awt.event.MouseEvent;

import java.awt.event.MouseListener;

import java.io.File;

import javax.swing.ImageIcon;

import javax.swing.JButton;

import javax.swing.JFileChooser;

import javax.swing.JFrame;

import javax.swing.JPanel;

import javax.swing.filechooser.FileNameExtensionFilter;

public class App extends JFrame implements MouseListener, ActionListener {

int x = 0;

int y = 0;

File[] selectedFiles = null;

int fileIndex = 0;

int width = 200;

int height = 200;

public App() {

setDefaultCloseOperation(EXIT_ON_CLOSE);

setLocationRelativeTo(null);

setSize(400, 300);

setResizable(false);

getContentPane().setLayout(null);

JPanel panel = new ImagePanel();

panel.setBounds(12, 40, 370, 218);

getContentPane().add(panel);

addMouseListener(this);

JButton btnBrowse = new JButton("Browse");

btnBrowse.addActionListener(this);

btnBrowse.setBounds(12, 9, 91, 21);

getContentPane().add(btnBrowse);

setVisible(true);

}

public static void main(String[] args) {

new App();

}

public void actionPerformed(ActionEvent e) {

JFileChooser chooser = new JFileChooser();

chooser.setMultiSelectionEnabled(true);

FileNameExtensionFilter filter = new FileNameExtensionFilter(

"JPG  GIF Images", "jpg", "gif");

// 设置文件类型

chooser.setFileFilter(filter);

// 打开选择器面板

int returnVal = chooser.showOpenDialog(this);

if (returnVal == JFileChooser.APPROVE_OPTION) {

selectedFiles = chooser.getSelectedFiles();

repaint();

}

}

public void mouseClicked(MouseEvent e) {

}

public void mouseEntered(MouseEvent e) {

}

public void mouseExited(MouseEvent e) {

}

public void mousePressed(MouseEvent e) {

Point point = MouseInfo.getPointerInfo().getLocation();

x = point.x;

y = point.y;

}

public void mouseReleased(MouseEvent e) {

Point point = MouseInfo.getPointerInfo().getLocation();

int thisX = point.x;

int thisY = point.y;

System.out.println("thisX=" + thisX + "  " + "thisY=" + thisY);

if ((y - thisY  20  y - thisY  0)

|| (y - thisY  0  y - thisY  -20)) {

// Y 在20范围内移动认为是水平移动

if (x  thisX) {

// right

if (selectedFiles != null

 fileIndex  selectedFiles.length - 1) {

fileIndex++;

}

} else {

// left

if (selectedFiles != null  fileIndex  0) {

fileIndex--;

}

}

} else {

if (x  thisX) {

// 右下

width += 20;

height += 20;

} else {

// 左上

width -= 20;

height -= 20;

}

}

repaint();

}

class ImagePanel extends JPanel {

public void paint(Graphics g) {

super.paint(g);

if (selectedFiles != null) {

ImageIcon icon = new ImageIcon(selectedFiles[fileIndex]

.getPath());

g.drawImage(icon.getImage(), 0, 0, width, height, this);

}

}

}

}

怎么用java代码放大或缩小图片不失真。

放大图像不会导致失真,而缩小图像将不可避免的失真。Java中也同样是这样。但java提供了4个缩放的微调选项。image.SCALE_SMOOTH //平滑优先image.SCALE_FAST//速度优先image.SCALE_AREA_AVERAGING //区域均值image.SCALE_REPLICATE //像素复制型缩放image.SCALE_DEFAULT //默认缩放模式调用方法Image new_img=old_img.getScaledInstance(1024, 768, Image.SCALE_SMOOTH);得到一张缩放后的新图。怎么用java代码放大或缩小图片不失真。

怎么讲编程软件上的代码放大,比如说将VC++6.0或是java或是VC2008之类的软件上面的代码放大。求高手啊!

vc6.0设置如下:点菜单 工具-》选择,然后弹出一个对话框,找到“格式”选项卡,里面可以设置字体,背景色和前景色。截图如下:

java小程序图片查看器代码,实现放大、缩小、旋转功能

我只实现了放大缩小功能,旋转还有点问题package com.lzw;import java.awt.BorderLayout;

import java.awt.Canvas;

import java.awt.Graphics;

import java.awt.Graphics2D;

import java.awt.Image;

import java.awt.Toolkit;

import java.awt.event.ActionEvent;

import java.awt.event.ActionListener;

import java.net.URL;import javax.swing.ImageIcon;

import javax.swing.JButton;

import javax.swing.JFrame;

import javax.swing.JPanel;

import javax.swing.JScrollPane;

import javax.swing.JSlider;

import javax.swing.event.ChangeEvent;

import javax.swing.event.ChangeListener;

/*

* @功能:实现图片的放大缩小与旋转功能

* @日期:2011.6.29

*/

public class OperationOnPic extends JFrame{

private JPanel imageJpanel;

private JPanel southJpanel;

private JButton rorateButton;

private Mycanvas canvas ;

private int imgWidth, imgHeight;

private JSlider jSlide; //滑动块组建

// private JScrollPane jScrollPane ;

Image img;

private static int num=0;

private static int newWidth=0;

private static int newHeigth=0;

public static boolean isroate=false;

public OperationOnPic(){

setTitle("图片操作");

//设置窗体大小

setSize(800, 600);

//设置窗体显示在中央位置

setLocationRelativeTo(null);

//URL imgUrl = OperationOnPic.class.getResource("2.jpg"); //获得图片路径

//img = Toolkit.getDefaultToolkit().getImage(imgUrl);// 获取图片资源

ImageIcon image=new ImageIcon(OperationOnPic.class.getResource("2.jpg"));

img=image.getImage();

canvas=new Mycanvas();

//调用布局方法

init();

//设置窗体可见

setVisible(true);

}

public void init(){

setDefaultCloseOperation(this.EXIT_ON_CLOSE); //设置窗体可关闭

imageJpanel=new JPanel();

southJpanel=new JPanel();

imageJpanel.setLayout(new BorderLayout());

imageJpanel.add(canvas,BorderLayout.CENTER);

imageJpanel.add(getJSlider(),BorderLayout.SOUTH);

rorateButton=new JButton("图片旋转");

rorateButton.addActionListener(new ActionListener(){ public void actionPerformed(ActionEvent e) {

// TODO Auto-generated method stub

num+=5;

isroate=true;

canvas.repaint();

isroate=false;

}

});

southJpanel.add(rorateButton); //将按钮添加到面板上

this.getContentPane().add(imageJpanel,BorderLayout.CENTER);

this.getContentPane().add(southJpanel,BorderLayout.SOUTH);

}

public JSlider getJSlider(){

if(jSlide==null){

jSlide=new JSlider(); //实例化一个滑动块对象

jSlide.setMaximum(500); //设置滑动块的最大取值

jSlide.setMinimum(1); //设置滑动块的最小取值

jSlide.setValue(50); //设置滑动块当前值

jSlide.addChangeListener(new ChangeListener(){ public void stateChanged(ChangeEvent e) {

// TODO Auto-generated method stub

canvas.repaint(); //重新绘制图像

}

});

}

return jSlide;

}

public static void main(String[] args) {

new OperationOnPic();

}

class Mycanvas extends Canvas{

public void paint(final Graphics g){ //重写paint

if(isroate==false){

imgWidth=img.getWidth(this);

imgHeight=img.getHeight(this);

float value=jSlide.getValue(); //取得滑动块的值

newWidth=(int)(imgWidth*value/100);

newHeigth=(int)(imgHeight*value/100);

g.drawImage(img,0,0,newWidth,newHeigth,this);

g.dispose();

}else{

num+=5;

Graphics2D g2=(Graphics2D)g;

g2.rotate(Math.toRadians(num));

g2.drawImage(img,0,0,400,400,this);

g.dispose();

}

}

}


新闻名称:java代码放大 编程放大代码和缩小代码
文章链接:http://pwwzsj.com/article/hhcsss.html