java – 将图像置于面板中间
发布时间:2020-12-15 05:07:37 所属栏目:Java 来源:网络整理
导读:我正在研究 Java中的Graphics并在JPanel上创建一个圆圈. 如何在JPanel中圈出圆圈? package exerciseninetwo;import javax.swing.*;import java.awt.*;import java.awt.geom.Ellipse2D; public class ExerciseNineTwo extends JFrame{ public ExerciseNineTw
我正在研究
Java中的Graphics并在JPanel上创建一个圆圈.
如何在JPanel中圈出圆圈? package exerciseninetwo; import javax.swing.*; import java.awt.*; import java.awt.geom.Ellipse2D; public class ExerciseNineTwo extends JFrame { public ExerciseNineTwo() { super("My Frame"); setSize(500,500); setDefaultCloSEOperation(JFrame.EXIT_ON_CLOSE); add(new CanvasPanel()); setVisible(true); } public static void main(String[] args) { new ExerciseNineTwo(); } } class CanvasPanel extends JPanel { CanvasPanel() { setSize(120,120); //setBackground(Color.cyan); } protected void paintComponent(Graphics g) { Graphics2D comp = (Graphics2D)g; Ellipse2D circle = new Ellipse2D.Float(200,200,200); comp.draw(circle); comp.setColor(Color.cyan); comp.fillRect(0,500,500); comp.setClip(circle); comp.setColor(Color.magenta); comp.fillRect(0,500); } } 解决方法
只需在面板中间绘制它.
float x = getWidth()/2 - ELLIPSE_WIDTH/2; float y = getHeight()/2 - ELLIPSE_HEIGHT/2; Ellipse2D circle = new Ellipse2D.Float(x,y,ELLIPSE_WIDTH,ELLIPSE_HEIGHT); (编辑:李大同) 【声明】本站内容均来自网络,其相关言论仅代表作者个人观点,不代表本站立场。若无意侵犯到您的权利,请及时与联系站长删除相关内容! |