While1.java

/**
 * Write a description of While1 here.
 * 
 * @author (your name) 
 * @version (a version number or a date)
 */
public class While1 {
    public String FindGene(String dna){
        int startIndex= dna.indexOf("ATG");
        
        int currIndex=dna.indexOf("TAA",startIndex+3);
        
        while(currIndex!=-1){
            if((currIndex-startIndex)%3==0){
                return dna.substring(startIndex,currIndex+3);
             
            
             }
             else{
                 currIndex= dna.indexOf("TAA",currIndex+1);
            
            
            
             }
            

   } 
   return "";


 }
 public void testFindGeneSimple(){
    
     String dna="AATGCGTAATTAATCG";
     System.out.println("DNA strand is " + dna);
     String gene=FindGene(dna);
     System.out.println("Gene is " + gene);
    
    
    
    
    }
 
 
 
 
 
 
 

}