How to generate password?

Question

Dear all,
Do anyone know how to generate the password??
I don't know use which method to that aim...
Can anyone give some advices?

Answer 1

Here's the code:
public class RandomPassword
     int l = 0;
     int h = 5;
     String charr[] = {"A", "B", "C", "1", "2", "3"};
     private String[] rarr = new String[6];
     RandomPassword()
          buildPassword();
          printPassword();
     private void buildPassword()
          int n;
          for (int i = 0; i <= 5; i++)
               n = getRandom(l, h);
               rarr[i] = charr[n];
private void printPassword()
          for (int i = 0; i <= 5; i++)
          System.out.print(rarr);
          System.out.println();
private int getRandom( int lower, int upper )
double nNum = Math.random();
int nDif,nResult;
while ( true )
nDif = (upper + 1) - lower;
nResult = lower + (int)( (double)nDif * nNum );
if ( ( nResult >= lower ) && ( nResult <= upper ) )
return nResult;
     public static void main(String args[])
          try
               new RandomPassword ();
               System.exit(0);
          catch ( Exception e )
               System.out.println ( "Can not start program");
Klint