0903(first)

//冒泡
public class Sort {
public static void main(String[] args) {

int[] nNum=new int[]{2,5,8,9,3};

for(int i=0;i<nNum.length;i++)
{
for (int j = i+1; j < nNum.length; j++)
{
if(nNum[j]>nNum[i])
{
int temp=nNum[j];
nNum[j]=nNum[i];
nNum[i]=temp;
}

}
}


for (int i = 0; i < nNum.length; i++)
{
System.out.println(nNum[i]);
}
}

}



import java.awt.Color;

import javax.swing.JFrame;


public class ShowStars extends JFrame{       //创建窗体
public static void main(String[] args) {

JFrame jf=new JFrame();

jf.setVisible(true);
jf.setSize(450, 450);
jf.getContentPane().setBackground(Color.black);

MyPanel mp=new MyPanel();
jf.add(mp);

}

}


import java.awt.Color;
import java.awt.Graphics;

import javax.swing.JPanel;


import java.awt.Color;
import java.awt.Graphics;
import javax.swing.JPanel;


public class MyPanel extends JPanel{     //创建画纸
@Override
public void paint(Graphics g) {
// TODO Auto-generated method stub
super.paint(g);

this.setBackground(Color.black);//画纸背景
g.setColor(Color.white);

g.drawLine(0, 0, 200, 200);  //画线
g.drawOval(20, 20, 50, 50);  //画圆
g.fillOval(20, 20,20, 20);   //实心圆

for(int i=50;i<300;i=i+10)
{
g.drawString("！", i, 50);
}

}

}