好寂寞啊

补张运行结果图

package net.gerhut.coolest;

import java.awt.BorderLayout;
import java.awt.Color;
import java.awt.Dimension;
import java.awt.FlowLayout;
import java.awt.Font;
import java.awt.FontMetrics;
import java.awt.Graphics;
import java.awt.Graphics2D;
import java.awt.Image;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.awt.image.BufferedImage;
import java.io.File;
import java.io.IOException;

import javax.imageio.ImageIO;
import javax.swing.JButton;
import javax.swing.JColorChooser;
import javax.swing.JFileChooser;
import javax.swing.JFrame;
import javax.swing.JOptionPane;
import javax.swing.JPanel;
import javax.swing.JTextField;
import javax.swing.event.ChangeEvent;
import javax.swing.event.ChangeListener;
import javax.swing.event.DocumentEvent;
import javax.swing.event.DocumentListener;
import javax.swing.filechooser.FileFilter;

public class Coolest {
    
	private Coolest() {
		(new MainFrame()).setVisible(true);
	}
	
	public static void main(String[] args) {
		new Coolest();
	}
	
	class MainFrame extends JFrame {
		
		private static final long serialVersionUID = 1L;
		
		private String bigText="古力斯特";
		private String smallText="Coolest!";
		private Color backColor=Color.BLACK;
		IconPanel pnlIcon=new IconPanel();
		
		public MainFrame()
		{
			this.setLayout(new BorderLayout());
			this.add(pnlIcon,BorderLayout.CENTER);
			this.add(new ControlPanel(),BorderLayout.EAST);
			this.pack();
			this.setDefaultCloseOperation(EXIT_ON_CLOSE);
			this.setResizable(false);
			this.setTitle("Coolest!");
		}
		
		class IconPanel extends JPanel
		{
			private static final long serialVersionUID = 1L;
			
			public IconPanel()
			{
				this.setPreferredSize(new Dimension(420,420));
			}
			
			@Override
			public void paint(Graphics g)
			{
				(new IconPainter(bigText,smallText,backColor)).startPaint((Graphics2D)g,true);
			}
		}
		
		class ControlPanel extends JPanel
		{
			private static final long serialVersionUID = 1L;
			
			public ControlPanel()
			{
				this.setLayout(new BorderLayout());
				JPanel pnlUp = new JPanel(new FlowLayout());
				this.add(pnlUp,BorderLayout.NORTH);
				final JTextField tfBigText=new JTextField(bigText,5);
				tfBigText.getDocument().addDocumentListener(new DocumentListener(){
					@Override
					public void changedUpdate(DocumentEvent e) {
						bigText=tfBigText.getText();
						pnlIcon.repaint();
					}
					
					@Override
					public void insertUpdate(DocumentEvent e) {
						bigText=tfBigText.getText();
						pnlIcon.repaint();
					}
					
					@Override
					public void removeUpdate(DocumentEvent e) {
						bigText=tfBigText.getText();
						pnlIcon.repaint();
					}
				});
				pnlUp.add(tfBigText);
				
				final JTextField tfSmallText=new JTextField(smallText,10);
				tfSmallText.getDocument().addDocumentListener(new DocumentListener(){
					@Override
					public void changedUpdate(DocumentEvent e) {
						smallText=tfSmallText.getText();
						pnlIcon.repaint();
					}
					
					@Override
					public void insertUpdate(DocumentEvent e) {
						smallText=tfSmallText.getText();
						pnlIcon.repaint();
					}
					
					@Override
					public void removeUpdate(DocumentEvent e) {
						smallText=tfSmallText.getText();
						pnlIcon.repaint();
					}
				});
				pnlUp.add(tfSmallText);
				
				JButton btnSave=new JButton("保存");
				btnSave.addActionListener(new ActionListener(){
					@Override
					public void actionPerformed(ActionEvent e) {
						JFileChooser fc=new JFileChooser(){
							private static final long serialVersionUID = 1L;
							
							public void approveSelection()
							{
								File savedFile = getSelectedFile();
								
								if (savedFile.exists())
								{
									int overwriteSelect = JOptionPane.showConfirmDialog(this,
									"文件" + savedFile.getName() + "已存在，是否覆盖?",
									"是否覆盖?",
									JOptionPane.YES_NO_OPTION,
									JOptionPane.WARNING_MESSAGE);
									if (overwriteSelect != JOptionPane.YES_OPTION)
									{
										return;
									}
								}
								
								super.approveSelection();
							}
						};
						fc.setFileFilter(new FileFilter(){
							@Override
							public boolean accept(File f) {
								return f.getName().substring(f.getName().lastIndexOf(".")+1).toLowerCase().equals("gif");
							}
							@Override
							public String getDescription() {
								return "GIF Image(*.gif).";
							}
						});
						fc.setSelectedFile(new File(bigText+".gif"));
						if(fc.showSaveDialog(null)==JFileChooser.APPROVE_OPTION)
						{
							File f=fc.getSelectedFile();
							if(f.getName().endsWith("gif"))f=new File(f.getAbsolutePath(),f.getName()+".gif");
							(new IconPainter(bigText,smallText,backColor)).save(fc.getSelectedFile());
						}
					}
				});
				pnlUp.add(btnSave);
				
				final JColorChooser ccBack=new JColorChooser(backColor);
				ccBack.setPreviewPanel(new JPanel());
				ccBack.removeChooserPanel(ccBack.getChooserPanels()[2]);
				ccBack.getSelectionModel().addChangeListener(new ChangeListener(){
					@Override
					public void stateChanged(ChangeEvent e) {
						backColor=ccBack.getColor();
						pnlIcon.repaint();
					}
				});
				this.add(ccBack,BorderLayout.CENTER);
			}
		}
	}
	class IconPainter {
		private final int GRAD_R=15;
		
		private String bigText="";
		private String smallText="";
		private Color backColor=Color.BLACK;
		
		public IconPainter(){}
		public IconPainter(String bigText,String smallText)
		{
			this.bigText=bigText;
			this.smallText=smallText;
		}
		public IconPainter(String bigText,String smallText,Color backColor)
		{
			this.bigText=bigText;
			this.smallText=smallText;
			this.backColor=backColor;
		}
		public void setBigText(String bigText) {
			this.bigText = bigText;
		}
		public String getBigText() {
			return bigText;
		}
		public void setSmallText(String smallText) {
			this.smallText = smallText;
		}
		public String getSmallText() {
			return smallText;
		}
		public void setBackColor(Color backColor) {
			this.backColor = backColor;
		}
		public Color getBackColor() {
			return backColor;
		}
		public void startPaint(Graphics2D graph,boolean clear)
		{
			Image img=new BufferedImage(420,420,BufferedImage.TYPE_INT_RGB);
			Graphics g=img.getGraphics();
			if(clear)
			{
				g.setColor(Color.WHITE);
				g.fillRect(0, 0, 420, 420);
			}
			for(int i=0;i<=GRAD_R;i++)
			{
				Color c=new Color(
				255-(255-backColor.getRed())*i/GRAD_R,
				255-(255-backColor.getGreen())*i/GRAD_R,
				255-(255-backColor.getBlue())*i/GRAD_R);
				g.setColor(c);
				g.fillOval(i+10, i+10, 400-2*i, 400-2*i);
			}
			
			g.setFont(new Font("黑体",Font.BOLD,160));
			g.setColor(Color.WHITE);
			String upText;
			String downText;
			if(bigText.length()<=2)
			{
				upText=bigText;
				downText="";
			}else if(bigText.length()<=4)
			{
				upText=bigText.substring(0,2);
				downText=bigText.substring(2);
			}else{
				upText=bigText.substring(0,2);
				downText=bigText.substring(2,4);
			}
			FontMetrics metrics=g.getFontMetrics();
			g.drawString(upText,
			210-metrics.stringWidth(upText)/2, 165);
			g.drawString(downText,
			210-metrics.stringWidth(downText)/2, 365);
			
			g.setFont(new Font("Wide Latin",Font.PLAIN,40));
			metrics=g.getFontMetrics();
			g.setColor(Color.YELLOW);
			g.drawString(smallText,
			210-metrics.stringWidth(smallText)/2,
			210+metrics.getHeight()/2);
			if(clear)
			{
				graph.setColor(Color.WHITE);
				graph.fillRect(0, 0, 420, 420);
			}
			graph.rotate(6,210,210);
			graph.drawImage(img,0,0,null);
		}
		
		public void save(File f)
		{
			BufferedImage img = new BufferedImage(420,420,BufferedImage.TYPE_4BYTE_ABGR);
			startPaint((Graphics2D) img.getGraphics(),true);
			try {
				ImageIO.write(img, "gif", f);
			} catch (IOException e) {
				e.printStackTrace();
			}
		}
	}
}