選択 - 経済統計練習帳

package select;
 
import java.sql.*; 
 
class select{ 
 
Connection dbx;   
Statement stx;   
String sqx; 
ResultSet  rsx; 
 
int key; 
String word;
int sx,number;
String[] name=new String[500];
String[] tonkilo=new String[500];
int[] year=new int[500];
int[] month=new int[500];
 
void makedata(String db,String tab,String code){ 
 
String url = "jdbc:h2:"+db+";create=true";   
String usr = "";   
String pwd = ""; 
 
 
 try
          {
            Class.forName("org.h2.Driver");
 
dbx = DriverManager.getConnection(url, usr, pwd); 
} catch (Exception ex) { ex.printStackTrace();} 
 
sx=0;
try {   
stx = dbx.createStatement(); 
sqx="select * from "+tab+" WHERE code="+change(code);   
rsx = stx.executeQuery(sqx); 
if (rsx != null) { 
while (rsx.next()) { 
sx=sx+1;
name[sx]= rsx.getString("name");
year[sx]= rsx.getInt("year");
} 
} 
 
number=sx;
 
rsx.close(); 
stx.close(); 
dbx.close(); 
 
} catch (Exception ex) {ex.printStackTrace();} 
 
 
 
 
} 
 
String change(String word){
String e;
e="'"+word+"'";
return e;    
}    
 
 
 
}
 
 
 
package select;
 
public class pro {
 
    String[] v=new String[500];
int[] year=new int[500];
int[] month=new int[500];
int number;
 String[] name=new String[500];
 
 
    public static void main(String[] args) {
       pro ts=new pro(); 
    }
    pro(){
 
 
            String db,tab;
 
        db="tamo";
        tab="tamo";
 
 
        select sub3=new select();
        sub3.makedata(db,tab,"251313");
        number=sub3.number;
        year=sub3.year;
        name=sub3.name;
 
        int s;
 
 
        for(s=1;s<number+1;s++){    
        System.out.println(year[s]+"年,"+name[s]);
        }
 
 
 
 
    }
 
 
 
}