写出一个random函数,随机产生执行接口shape的对象:包括矩形、椭圆,线等,位置随机,调用它10次,画出所有图形,
我看这道题目的意思就是执行shape接口,随机画出10个图形。已经写好的程序部分如下:
Use the following class as your main class:
import javax.swing.JFrame;
public class RandomShapeViewer
{
public static void main(String[] args)
{
JFrame frame = new JFrame();
final int FRAME_WIDTH = 300;
final int FRAME_HEIGHT = 400;
frame.setSize(FRAME_WIDTH, FRAME_HEIGHT);
frame.setTitle("RandomShapeViewer");
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
RandomShapesComponent component = new RandomShapesComponent();
frame.add(component);
frame.setVisible(true);
}
}
Use the following class in your solution:
import javax.swing.JComponent;
import java.awt.Graphics;
import java.awt.Graphics2D;
public class RandomShapesComponent extends JComponent
{
public void paintComponent(Graphics g)
{
Graphics2D g2 = (Graphics2D) g;
RandomShapeGenerator r
= new RandomShapeGenerator(getWidth(), getHeight());
for (int i = 1; i <= 10; i++)
g2.draw(r.randomShape());
}
}
怎么产生随机图形呢,说是要实现shape interface啊
我看这道题目的意思就是执行shape接口,随机画出10个图形。已经写好的程序部分如下:
Use the following class as your main class:
import javax.swing.JFrame;
public class RandomShapeViewer
{
public static void main(String[] args)
{
JFrame frame = new JFrame();
final int FRAME_WIDTH = 300;
final int FRAME_HEIGHT = 400;
frame.setSize(FRAME_WIDTH, FRAME_HEIGHT);
frame.setTitle("RandomShapeViewer");
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
RandomShapesComponent component = new RandomShapesComponent();
frame.add(component);
frame.setVisible(true);
}
}
Use the following class in your solution:
import javax.swing.JComponent;
import java.awt.Graphics;
import java.awt.Graphics2D;
public class RandomShapesComponent extends JComponent
{
public void paintComponent(Graphics g)
{
Graphics2D g2 = (Graphics2D) g;
RandomShapeGenerator r
= new RandomShapeGenerator(getWidth(), getHeight());
for (int i = 1; i <= 10; i++)
g2.draw(r.randomShape());
}
}
怎么产生随机图形呢,说是要实现shape interface啊
public void print();
}public rectangle implements shape{
public void print(){
system.out.print("draw rectangle");
}
}public triangle implements shape{
public void print(){
system.out.print("draw triangle ");
}
}
.
.
.
public static void main(String[] args){
Random rd=new Random();
Shape shape=null;
int num=rd.next(10);
switch(num){
case 1: new triangle ().print();
case 2: new rectangle().print();
.
.
.
}
}