drawtu.java~16~

java语言写的

package scoremis;
import java.awt.*;
import javax.swing.*;
import java.sql.*;

/**
 * <p>Title: </p>
 * <p>Description: </p>
 * <p>Copyright: Copyright (c) 2007</p>
 * <p>Company: </p>
 * @
 * @version 1.0
 */

public class drawTu extends JPanel{
  String tname;
  String tgreade;
  int count=0;   //存放总人数
  int dengji[]=new int[10];//存放各等级人数
  //JPanel p1=new JPanel();
  public drawTu(String tname,String tgreade) {
    try{
      this.tname=tname;
      this.tgreade=tgreade;
      jbInit();
      }catch(Exception exception)  {exception.printStackTrace();}
  }
  private void jbInit(){
    try{
      setLayout(new BorderLayout());
      for(int i=0;i<10;i++)   //将各等级人数清零
        dengji[i]=0;
        dbconn db=new dbconn();
        ResultSet rs=db.Query("select * from S_C where CID='"+tname+"' and Tgreade='"+tgreade+"'");
        while(rs.next()){
          float fen=rs.getFloat("score");
          count++;
          switch((int)fen/10){
             case 10:
             case 9:dengji[9]=dengji[9]+1;break;
             case 8:dengji[8]=dengji[8]+1;break;
             case 7:dengji[7]=dengji[7]+1;break;
             case 6:dengji[6]=dengji[6]+1;break;
             case 5:dengji[5]=dengji[5]+1;break;
             case 4:dengji[4]=dengji[4]+1;break;
             case 3:dengji[3]=dengji[3]+1;break;
             case 2:dengji[2]=dengji[2]+1;break;
             case 1:dengji[1]=dengji[1]+1;break;
             case 0:dengji[0]=dengji[0]+1;
             }
        }
    }catch(Exception e){System.out.println(e.toString());}
  }
  public void paintComponent(Graphics g){
    int x=0,y=0,x1=0,y1=10;
    g.drawLine(40,30,40,300); //输出坐标轴（X,Y）
    g.drawLine(40,300,380,300);
    for(int i=0;i<=10;i++) { //输出x,y坐标的刻度及数值
      g.setColor(Color.red);
      g.drawLine(40+x,298,40+x,302);
      g.drawString(String.valueOf(y),38+x,315);
      g.drawLine(38,280-x1,41,280-x1);
      g.drawString(String.valueOf(y1),20,285-x1);
      x=x+30; //每刻度的间隔
      y=y+10;
      x1=x1+25;
      y1=y1+10;
    }
    g.drawString("分数",405,310);
    g.drawString("百分比单位%",20,25);
    for(int i=1;i<=10;i++) {
      g.setColor(Color.blue);
      g.fillRect(30+(i-1)*30,300-(int)((float)dengji[i-1]/count*100*2.5),15,(int)((float)dengji[i-1]/count*100*2.5)); ;
      g.setColor(Color.blue); //写百分比
      g.drawString(String.valueOf((int)((float)dengji[i-1]/count*100))+'%',30+(i-1)*30,290-(int)((float)dengji[i-1]/count*100*2.5));
    }
  }
}