Asked By
yannie
0 points
N/A
Posted on - 04/13/2012
Hi,
I really need some Java Programmers to help me solve this problem. I have a database which has already data stored in it. I'm planning to get a random value in the database every time it calls it. My program is a guessing game like Hangaroo and random words from db should be get.
For example in my database I have 5 values in it and then when the program opens, it gets a random one from those 5 values. I only know how to get values from a db but not randomly.
What will I do to make my program get a random value?
Answered By
looni23
0 points
N/A
#99328
Calling a Random Value from a Database in JAVA
Hello Yannie,
The things you will be needed are a variable that generates a random number and a java switch case.
Step 1: Import the class that generates random numbers in various ranges.
Import java.util.Random;
Step 2: Initialize a variable that receives a random number.
Â
Random randomNumber = new Random();
int x = randomNumber.nextInt(5);Â
Â
Variable x is needed/important in the next step to come up with a random value.
The number inside "nextInt(5)" which is 5 is the limit of the number to be generated. In the Example show the number to be generated is until 5. So the generated number will be 0-5.
Step 3: Use the Java Switch Case.
Â
String value;
switch (x)
{
case 0:
value = value1; // value in the database
break;
case 1:
value = value2; // value in the database
break;
case 2:
value = value3; // value in the database
break;
case 3:
value = value4; // value in the database
break;
case 4:
value = value5; // value in the database
break;
default:
doSomethingElse();
}
The variable x inside "switch (x)" is now random.
Hope my answer help you.
