给你的头像+1

记得那些年我们玩过的头像+1，恶作剧让朋友圈里的人都以为有人和他说话~

 

 

 

思路，刚学习完Swing,使用Java中Java2D图形操作库进行绘制

参考代码如下：

import javax.swing.*;
import java.awt.*;
import java.awt.font.*;
import java.awt.geom.*;
import java.util.Scanner;

/**
 * Created by CAD on 2016/12/1.
 */
public class ImagePlusOne {
    public static void main(String[] args){
        Scanner in = new Scanner(System.in);
        String imageUrl = in.next();  //输入路径，注意转义
        int num = in.nextInt();  //输入图中数字
        EventQueue.invokeLater(new Runnable() {
            @Override
            public void run() {
                JFrame frame = new ImageFrame(imageUrl,num);
                frame.setTitle("imageTest");
                frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
                frame.setVisible(true);
            }
        });
    }
}

class ImageFrame extends JFrame {
    private Image image;
    public ImageFrame(String url,int n){
        ImageComponent imageComponent = new ImageComponent(url,n);
        add(imageComponent);
        image = imageComponent.getImage();
        setSize(image.getWidth(this) + 45,image.getHeight(this) + 45);
        setLocationByPlatform(true);
    }
}

class ImageComponent extends JComponent {
    private Image image;
    private int num;

    public ImageComponent(String url,int an){
        image = new ImageIcon(url).getImage();
        num = an;
    }

    public Image getImage() {
        return image;
    }
    public void paintComponent(Graphics g){
        if (image == null) return ;
        int imageWidth = image.getWidth(this);
        int imageHeight = image.getHeight(this);

        // draw the image int the upper-left corner
        g.drawImage(image,0,0,null);

        // 画圆
        Graphics2D g2 = (Graphics2D)g;
        double radius = imageHeight / 10;  // 圆半径
        double centerX = imageWidth - radius;
        double centerY = radius;
        Ellipse2D circle = new Ellipse2D.Double();
        circle.setFrameFromCenter(centerX,centerY,centerX + radius,centerY + radius);
        g2.setPaint(Color.RED);  // 设置颜色
        g2.fill(circle);  //填充圆颜色

        String numTemp = "";
        if(num >= 100)
            numTemp += "99+";
        else
            numTemp += num;

        // 设置字体
        Font f = new Font("Arial",Font.BOLD,(int)radius);
        g2.setFont(f);

        // 得到包围字体的矩形,为了让字体近似居中
        FontRenderContext context = g2.getFontRenderContext();
        Rectangle2D fontBounds = f.getStringBounds(numTemp,context);

        double numX = centerX - fontBounds.getWidth() / 2;
        double numY = centerY + fontBounds.getHeight() / 3;
        g2.setPaint(Color.WHITE);
        g2.drawString(numTemp,(int)numX,(int)numY);
    }
}

图片处理结果如下：