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java代碼放大 編程放大代碼和縮小代碼

求java編程實現(xiàn)一個正方形放大縮小的代碼

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import java.awt.*;

import javax.swing.*;

public class Square extends JFrame{

public static void main(String[] args){

JFrame frame=new JFrame("可變正方形");

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);//當(dāng)正方形移到屏幕里面時關(guān)閉程序，如果沒有該語句則最后屏幕會變成綠色

}

repaint();

}

}

//縮小就只需要把相關(guān)數(shù)據(jù)更改一下就OK了，希望對你有幫助!

//其實就是利用線程不斷重新畫圖

求Java編一個放大縮小一個字符串的代碼？

給你一個簡單的例子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);// 顯示

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);// 關(guān)閉方式

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, "字體達(dá)到最大值");

}

panel.repaint();

}

});

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

JButton b2 = new JButton("縮小");

b2.addActionListener(new ActionListener() {

public void actionPerformed(ActionEvent e) {

if(size = 12){

size -= 2;

}else{

JOptionPane.showMessageDialog(null, "字體達(dá)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 = "這是一個簡單的JFrame";

g2D.drawString(intNumber, 70, 32);

}

};

}

public static void main(String[] args) {

new ImageDemo();

}

}

如何用Java實現(xiàn)圖形的放大和縮小

java實現(xiàn)圖形的放大和縮小，其實就是在畫圖時，改變圖片的長和寬。以下代碼參考一下：

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");

//?設(shè)置文件類型

chooser.setFileFilter(filter);

//?打開選擇器面板

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范圍內(nèi)移動認(rèn)為是水平移動

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代碼放大或縮小圖片不失真。

放大圖像不會導(dǎo)致失真，而縮小圖像將不可避免的失真。Java中也同樣是這樣。但java提供了4個縮放的微調(diào)選項。image.SCALE_SMOOTH //平滑優(yōu)先image.SCALE_FAST//速度優(yōu)先image.SCALE_AREA_AVERAGING //區(qū)域均值image.SCALE_REPLICATE //像素復(fù)制型縮放image.SCALE_DEFAULT //默認(rèn)縮放模式調(diào)用方法Image new_img=old_img.getScaledInstance(1024, 768, Image.SCALE_SMOOTH);得到一張縮放后的新圖。怎么用java代碼放大或縮小圖片不失真。

怎么講編程軟件上的代碼放大，比如說將VC++6.0或是java或是VC2008之類的軟件上面的代碼放大。求高手??！

vc6.0設(shè)置如下：點菜單　工具－》選擇，然后彈出一個對話框，找到“格式”選項卡，里面可以設(shè)置字體，背景色和前景色。截圖如下：

java小程序圖片查看器代碼，實現(xiàn)放大、縮小、旋轉(zhuǎn)功能

我只實現(xiàn)了放大縮小功能，旋轉(zhuǎn)還有點問題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：實現(xiàn)圖片的放大縮小與旋轉(zhuǎn)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; //滑動塊組建

// 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("圖片操作");

//設(shè)置窗體大小

setSize(800, 600);

//設(shè)置窗體顯示在中央位置

setLocationRelativeTo(null);

//URL imgUrl = OperationOnPic.class.getResource("2.jpg"); //獲得圖片路徑

//img = Toolkit.getDefaultToolkit().getImage(imgUrl);// 獲取圖片資源

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

img=image.getImage();

canvas=new Mycanvas();

//調(diào)用布局方法

init();

//設(shè)置窗體可見

setVisible(true);

}

public void init(){

setDefaultCloseOperation(this.EXIT_ON_CLOSE); //設(shè)置窗體可關(guān)閉

imageJpanel=new JPanel();

southJpanel=new JPanel();

imageJpanel.setLayout(new BorderLayout());

imageJpanel.add(canvas,BorderLayout.CENTER);

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

rorateButton=new JButton("圖片旋轉(zhuǎn)");

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); //將按鈕添加到面板上

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

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

}

public JSlider getJSlider(){

if(jSlide==null){

jSlide=new JSlider(); //實例化一個滑動塊對象

jSlide.setMaximum(500); //設(shè)置滑動塊的最大取值

jSlide.setMinimum(1); //設(shè)置滑動塊的最小取值

jSlide.setValue(50); //設(shè)置滑動塊當(dāng)前值

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

// TODO Auto-generated method stub

canvas.repaint(); //重新繪制圖像

}

});

}

return jSlide;

}

public static void main(String[] args) {

new OperationOnPic();

}

class Mycanvas extends Canvas{

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

if(isroate==false){

imgWidth=img.getWidth(this);

imgHeight=img.getHeight(this);

float value=jSlide.getValue(); //取得滑動塊的值

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();

}

}

}


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