代码能运行成功但东西出不来能帮忙看下代码吗？.O_O.importjava.awt.Color;importjava.awt.Graphics2D;importjavax.swing.JComponent;importjavax.swing.JFrame;importjava.awt.geom....

代码 能运行成功 但东西出不来 能帮忙看下代码吗？.O_O.

import java.awt.Color;

import java.awt.Graphics2D;

import javax.swing.JComponent;

import javax.swing.JFrame;

import java.awt.geom.Ellipse2D;

import javax.swing.JComponent;

import java.awt.Graphics;

class circleComponent extends JComponent

{

public void drawComponent(Graphics g)

{

Graphics2D g2=(Graphics2D) g;

Ellipse2D.Double ellipse=new Ellipse2D.Double(100,100,100,100);

g2.setColor(Color.PINK);

g2.draw(ellipse);

g2.fill(ellipse);

Ellipse2D.Double ellipse2=new Ellipse2D.Double(150,150,50,50);

g2.setColor(Color.WHITE);

g2.draw(ellipse2);

g2.fill(ellipse2);

}

}

class ab

{

public static void main(String args [])

{

JFrame frame=new JFrame();

final int FRAME_WIDTH=300;

final int FRAME_HEIGHT=300;

frame.setSize(FRAME_WIDTH,FRAME_HEIGHT);

frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);

circleComponent component=new circleComponent();

frame.add(component);

frame.setVisible(true);

}

}

那我要怎么改啊？

展开