4 different random number for sqlite test aplication?

Question

I want four different numbers within the specified range but I get some number and some date.

This application is a test application for these choices

Random rn = new Random(); 
int rangetp = maximumb - minimumb + 1; 
randomNums = rn.nextInt(rangetp) + minimumb; 

Random rn1 = new Random(); 
int rangetp1 = maximumb - minimumb + 1; 
randomNums1 = rn1.nextInt(rangetp1) + minimumb; 

Random rn2 = new Random(); 
int rangetp2 = maximumb - minimumb + 1; 
randomNums2= rn2.nextInt(rangetp2) + minimumb; 

Random rn3 = new Random(); 
int rangetp3 = maximumb - minimumb + 1; 
randomNums3 = rn3.nextInt(rangetp3) + minimumb; 

SQLiteDatabase db = veridepo.getReadableDatabase();
cursor = db.rawQuery(
    "SELECT yabanci, turkce, biliyorum
    FROM tablomm
    WHERE id = " + randomNums + "" + sorsunmu + "", null);

cursor1 = db.rawQuery(
    "SELECT yabanci, turkce, biliyorum 
    FROM tablomm 
    WHERE id = " + randomNums1 + "" + sorsunmu + "", null); 

cursor2 = db.rawQuery(
    "SELECT yabanci, turkce, biliyorum 
    FROM tablomm 
    WHERE id = " + randomNums2 + "" + sorsunmu + "", null); 

cursor3 = db.rawQuery(
    "SELECT yabanci, turkce, biliyorum 
    FROM tablomm 
    WHERE id = " + randomNums3 + "" + sorsunmu + "", null);

what is the question pls modify it so that its become clear – DjHacktorReborn Mar 10 '13 at 11:10 — DjHacktorReborn, Mar 10 '13 at 11:10
related QA: http://stackoverflow.com/q/363681/944070 – madlymad Mar 10 '13 at 12:45 — madlymad, Mar 10 '13 at 12:45

madlymad · Accepted Answer · 2013-03-10T11:26:50.403

3

You just need one Random Object not 4!

Random rn = new Random(); 
int rangetp = maximumb - minimumb + 1; 
randomNums = rn.nextInt(rangetp) + minimumb; 

int rangetp1 = maximumb - minimumb + 1; 
randomNums1 = rn.nextInt(rangetp1) + minimumb; 

int rangetp2 = maximumb - minimumb + 1; 
randomNums2= rn.nextInt(rangetp2) + minimumb; 

int rangetp3 = maximumb - minimumb + 1; 
randomNums3 = rn.nextInt(rangetp3) + minimumb;

read documentation about Random: https://developer.android.com/reference/java/util/Random.html

this a java "problem" about randoming numbers and how to achieve a more random way of getting a random number.

edited Mar 10 '13 at 11:26

answered Mar 10 '13 at 11:21

madlymad

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//random numbers are 0,1,2,3 ArrayList numbers = new ArrayList(); Random randomGenerator = new Random(); while (numbers.size() < 4) { int random = randomGenerator .nextInt(4); if (!numbers.contains(random)) { numbers.add(random); } } Can it ? – tedris Mar 10 '13 at 12:00
The problem is that are in sequence? Because the way you allow the add only gets 0,1,2,3 – madlymad Mar 10 '13 at 12:07
the problem is solved – tedris Mar 10 '13 at 12:26

4 different random number for sqlite test aplication?

1 Answers1