3 lines i dont understand

[Dmitri Makovetskiy]

my task is..:
1) create a dictionary. the user should feed words to both languages till the word "enough" is typed in.
2) write a sentence in hebrew.
3)seperate teh words in teh senentece and compare them to the words in teh dictionary i previously created

i practiced rewriting the code myself, i re-wrote everything successfully . apart from those lines.. i dont know what they mean,,please help.

  import java.io.*;
class Trans
{
	public static void main(String[] args)
	{
		Console console=System.console();
		int count=0;
		String hebrew="";
		String deutsch="";
		String word;
		System.out.println("Please enter a word in hebrew or ENOUGH to finish");
		word=console.readLine();
		while(!word.equals("ENOUGH"))
		{
			
			hebrew=hebrew+word+"|";
			System.out.println("Please enter the meaning of "+word+" in german");
			word=console.readLine();
			deutsch=deutsch+word+"|";
			count++;
			System.out.println("Please enter a word in hebrew or ENOUGH to finish");
			word=console.readLine();
		}		

		String[] heb;
		String[] ger;
		heb=new String[count];
		ger=new String[count];

		int index=0;
		for(int i=0;i<count;i++)
		{
			word="";
			while(hebrew.charAt(index)!='|')
			{
				word+=hebrew.charAt(index);
				index++;
			}
			heb[i]=word;		
			index++;
		}

		index=0;
		for(int i=0;i<count;i++)
		{
			word="";
			while(deutsch.charAt(index)!='|')
			{
				word+=deutsch.charAt(index);
				index++;
			}
			ger[i]=word;		
			index++;
		}

		///////////////////////////////////
		int i;
		boolean found;
		System.out.println("Please enter a sentence in german for translation");
		String sentence;
		String translation;
		sentence=console.readLine();
		while(!sentence.equals("ENOUGH"))
		{
		      translation="";
			
     		      index=0;

		      while(index<sentence.length())
		      {
			word="";
			while(index<sentence.length() && sentence.charAt(index)==' ') // what does this method do , and why do i need it the code to work
				index++;

			while(index<sentence.length() && sentence.charAt(index)!=' ') // isnt this line enough to make the code work? 
			{
				word+=sentence.charAt(index);		
				index++;
			}

			found=false;
			for(i=0;i<ger.length && !found;i++)
			{
				if(word.equals(ger[i]))
					found=true;
			}
			
			if(found)
				translation=translation+heb[i-1]+" ";
			else
				translation=translation+word+" ";
		      }

		       System.out.println(translation);
		       System.out.println("Please enter a sentence in german for translation");		
		       sentence=console.readLine();

		}
		




	}
}  

[David Newton]

Well, when you were "playing computer" with the pen and paper, what did you come up with?

Maybe start by breaking down each of the conditionals: what do each of the following mean?

1) index < sentence.length()
2) sentence.charAt(index) == ''
3) sentence.charAt(index) != ''

As to whether or not it works with only one of those, when you commented one out, what happened?

(And I'm not sure what "practiced rewriting the code myself" means; if you re-wrote it yourself, why would you write two lines you didn't understand, and how did you know to write them?)

[David Newton]

This code:

        int index=0;  
        for(int i=0;i<count;i++)  
        {  
            word="";  
            while(hebrew.charAt(index)!='|')  
            {  
                word+=hebrew.charAt(index);  
                index++;  
            }  
            heb[i]=word;          
            index++;  
        }  
  
        index=0;  
        for(int i=0;i<count;i++)  
        {  
            word="";  
            while(deutsch.charAt(index)!='|')  
            {  
                word+=deutsch.charAt(index);  
                index++;  
            }  
            ger[i]=word;          
            index++;  
        }  

is essentially identical, and should be refactored into a single method.