java 2D图形绘制

package jisuan;

import java.awt.Dimension;

import java.awt.EventQueue;

import java.awt.Graphics;

import java.awt.Graphics2D;

import java.awt.geom.Ellipse2D;

import java.awt.geom.Line2D;

import java.awt.geom.Rectangle2D;

import javax.swing.JComponent;

import javax.swing.JFrame;

public class Drawtest {

    public static void main(String[] args) {

        EventQueue.invokeLater(new Runnable() {

            @Override

            public void run() {

                JFrame frame = new DrawFrame();

                frame.setTitle("计算器");

                frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);

                frame.setVisible(true);

            }

        });

    }

}

class DrawFrame extends JFrame

{

    /**

     * 创建一个窗口

     */

    private static final long serialVersionUID = 1L;

    public DrawFrame() {

        add(new DrawComponent());

        pack();

    }

}

class DrawComponent extends JComponent

{

    /**

     * 画图

     */

    private static final long serialVersionUID = 1L;

    private static final int DEFAULT_WIDTH = 400;

    private static final int DEFAULY_HEIQHT = 400;

    public void paintComponent(Graphics g) {

        Graphics2D g2 = (Graphics2D)g;

        double leftX = 100;

        double topY = 100;

        double width = 200;

        double height = 150;

        //长方形

        Rectangle2D rect = new Rectangle2D.Double(leftX, topY , width , height);

        g2.draw(rect);

        //椭圆

        Ellipse2D ellipse = new Ellipse2D.Double();

        ellipse.setFrame(rect);

        g2.draw(ellipse);

        //画斜线

        g2.draw(new Line2D.Double(leftX ,topY ,leftX + width, topY + height));

        //大园

        double centerX = rect.getCenterX();

        double centerY = rect.getCenterY();

        double radius = 150;

        Ellipse2D circle = new Ellipse2D.Double();

        circle.setFrameFromCenter(centerX, centerY, centerX + radius, centerY + radius);

        g2.draw(circle);

    }

    public Dimension getPreferredSize() {

        return new Dimension(DEFAULT_WIDTH, DEFAULY_HEIQHT);

    }

}
巴特西

java 2D图形绘制

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