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@mikkipastel
Created June 8, 2017 13:59
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from my flash drive
INSERT INTO Players (playerno,pname,initials,Year_of_birthsex,year_jointed,town,leagueno)
VALUES (6,Paramenter,R,1964,M,1977,Stratford,8467);
CREATE TABLE Teams
( paymentno int,
pdate datetime,
amonut float,
PRIMARY KEY (paymentno)
)
SELECT pname
FROM Players P
WHERE p.sex=M;
SELECT *
FROM Players P
WHERE P.sex="M" and P.town="Stratford";
SELECT P.pname,PN.amonut
FROM Players P,Penalties PN
WHERE P.playerno = PN.playerno and PN.amonut >50
ORDER BY P.pname
** เวลา เซฟชื่อไฟลืต้องเซฟชื่อตามชื่อ class
**********
Dir >> รับข้อมูลทางคีย์บอร์ดโดยใช้ JOptionPane
import javax.swing.*;
class test
{
public static void main(String[] args)
{
double width,height,area;
String buf;
for(int i=0;i<5;i++){
buf = JOptionPane.showInputDialog("width");
width = Double.parseDouble(buf);
buf = JOptionPane.showInputDialog("height");
height = Double.parseDouble(buf);
area=0.5*width*height;
System.out.println("Area = " +area);
}
}
}
***************
Dir >> รับข้อมูลทางคีย์บอร์ดโดยใช้ scanner
import java.util.*;
class test
{
public static void main(String[] args)
{
double width,height,area;
String buf;
Scanner input = new Scanner(System.in);
for(int i=0;i<5;i++){
System.out.print("Width = ");
width = input.nextDouble();
System.out.print("height = ");
height = input.nextDouble();
area=0.5*width*height;
System.out.println("Area = " +area);
}
}
}
***************
Dir >> รับข้อมูลจาก file โดยที่ไฟล์ข้อมูลต้องอยุ่ใน ไดเรกทอรี่เดียวกับที่เซฟจาวา ไว้
import java.util.*;
import java.io.*;
class test
{
public static void main(String[] args)
{
double width,height,area;
String buf;
try{
Scanner input = new Scanner(new File("data.txt"));
while(input.hasNext()){
width = input.nextDouble();
height = input.nextDouble();
area=0.5*width*height;
System.out.println("Area = " +area);
}
}
catch(Exception e){System.err.println(e);}
}
}
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