p083106 - 経済統計練習帳

package memo;
 
 
public class pro {
 
 
    int sx,number;
int[] year=new int[500];
String[] v=new String[500];
int[] month=new int[500];
double[] delta=new double[500];
 
 
 
public static void main(String[] args) {
        pro t=new pro();
    }
    pro(){
 
        String db,tab;
 
        db="trade";
        tab="trade";
        String b1;
       int s;
 
 
 
 
        select sub=new select();
        sub.makedata(db,tab,"c1","ex","v","m45");
        number=sub.number;
        v=sub.v;
        year=sub.year;
        month=sub.month;
 
 
    for(s=1;s<number+1;s++){   
    int n=numx(v[s])/(100000);
        System.out.println(year[s]+"年"+month[s]+"月,"+n);     
    }
 
 
 
 
 
 
    }
 
 
 
 
 
 
 
 
     int numx(String str){
 
    int nx;
 
    nx=0;
 
 try{
 
    nx=Integer.parseInt(str);
 
 }catch (Exception e) {}
 
 return nx;
 
 
 
}
 
 
 
 
 
double num(String str){
 
    double nx;
 
    nx=0;
 
 try{
 
    nx=Double.parseDouble(str);
 
 }catch (Exception e) {}
 
 return nx;
 
 
 
}
 
 
 
}
 
 
package memo;
 
import java.sql.*; 
 
class select{ 
 
Connection dbx;   
Statement stx;   
String sqx; 
ResultSet  rsx; 
 
int key; 
String word;
int sx,number;
int[] year=new int[5000];
String[] v=new String[5000];
int[] month=new int[500];
 
void makedata(String db,String tab,String c1,String cr,String u1,String b1){ 
 
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 country ="+change(c1)+" and credit="+change(cr)+" and unit="+change(u1)+" and bus="+change(b1);   
rsx = stx.executeQuery(sqx); 
if (rsx != null) { 
while (rsx.next()) { 
sx=sx+1;
v[sx]= rsx.getString("value");
year[sx]=rsx.getInt("year");
month[sx]=rsx.getInt("month");
} 
} 
 
number=sx;
 
 
rsx.close(); 
stx.close(); 
dbx.close(); 
 
} catch (Exception ex) {ex.printStackTrace();} 
 
 
 
 
} 
 
String change(String word){
String e;
e="'"+word+"'";
return e;    
}    
 
 
 
}