Question

求Java 简单程序 从对话框中（Dialog）输入一个数，输入1画线，2画圈，三画方框。每个图形个数1-7.

窗口大小为（300,300）；
求速度。!!。追加分，，在线等。。。

Answer 1

//只是做了 能够显示 线 圈 方框
//其他地方 楼主自己修改下
import java.awt.BorderLayout;
import java.awt.Container;
import java.awt.Graphics;
import java.awt.Graphics2D;
import java.awt.Polygon;
import java.awt.Rectangle;
import java.awt.geom.Arc2D;

import javax.swing.JFrame;
import javax.swing.JPanel;

class J_Panel extends JPanel
{
protected void paintComponent(Graphics g)
{
int[] x =
{ 55, 67, 109 };
int[] y =
{ 0, 36, 36 };
Graphics2D g2d = (Graphics2D) g;
g.clearRect(0, 0, getWidth(), getHeight());

g.drawLine(30, 30, 30, 90);
g2d.translate(80, 20);
g2d.draw(new Rectangle(0, 10, 60, 40));

g2d.translate(50, 20);
g2d.rotate(Math.PI / 2);
g2d.rotate(-Math.PI / 2);
g2d.translate(40, -30);
g2d.draw(new Arc2D.Double(0, 30, 40, 40, 0, 360, Arc2D.OPEN));
g2d.translate(70, 0);
g2d.draw(new Polygon(x, y, x.length));

}
}

public class pic extends JFrame
{
public pic()
{
super("图形显示");
Container c = getContentPane();
c.add(new J_Panel(), BorderLayout.CENTER);
}

public static void main(String args[])
{
pic pp = new pic();

pp.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
pp.setSize(300, 300);
pp.setVisible(true);
}
}