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Thread: Have I lost it?

  1. #1
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    Default Have I lost it?

    For some reason my boolean keeps getting changed. Any ideas why and where I screwed up?

    Class one
    public class PrimeTester {
     
    	  public static boolean isPrime ( int num )
    	  {
    	    boolean prime = true;
    	    int limit = (int) Math.sqrt ( num );  
     
    	    for ( int i = 2; i <= limit; i++ )
    	    {
    	      if ( num % i == 0 )
    	      {
    	        prime = false;
    	        break;
    	      }
    	    }
     
    	    return prime;
    	  }
     
    }

    Class Two (Problem Class)

     
     
    public static void main(String[] args) {
     
    		int currentNum = 2;
    		int numOfPrim = 0;
    		int currentPrime = 0;
    		boolean check = false;
     
    		while(currentNum < 10)
    		{
    			System.out.println("1st check " + check);
    			check = PrimeTester.isPrime(currentNum);
    			System.out.println("2nd check " +check);
    			if(check = true){
    				System.out.println("3rd check " +check);
    				numOfPrim = numOfPrim +1;
    				//System.out.println("Number of Prime: " + numOfPrim);
    				currentPrime = currentNum;
    				System.out.println("Current Prime " + currentPrime);
    				System.out.println("");
    			}
    			//System.out.println("3rd check " +check);
    			//System.out.println("Current Num " + currentNum);
    			//System.out.println("");
    			currentNum = currentNum + 1;
     
    		}
     
    		//System.out.println(currentPrime);
     
     
    	}
     
    }


  2. #2
    Super Moderator helloworld922's Avatar
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    Default Re: Have I lost it?

    if(check = true){

    = is the assignment operator. == is the equality check operator.

  3. The Following User Says Thank You to helloworld922 For This Useful Post:

    pooleman133 (September 7th, 2012)

  4. #3
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    Default Re: Have I lost it?

    Big thanks

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