title: Printing string array also prints null
body: <p>When I am printing contents of a string array the output is printing 'null' as well. I am not sure what's wrong with this. Here is the output, what I expect is the output without 'null'</p>
  
  <pre><code>null(wa?&gt;=0)nullnull*(wo?&gt;=0)nullnull*(4*wa?+7*wo?&gt;=50)nullnull*(d1=10)nullnull*((d2=1)+(k=2))nullnull
  </code></pre>
  
  <p>Thanks and appreciate your help. I would say my skill in Java in beginner level and I started two weeks back.</p>
  
  <p>Here is the actual code:</p>
  
  <pre><code>        String[] arrStr = new String[50];
          int countStr = 0;
  
          for (int i = 0; i &lt; para.length; i++) {
              if (para[i] == '(') {
                  count = count + 1;
              }
              if (para[i] == ')') {
                  count = count - 1;
              }
              if (count &gt; 0) {
                  arrStr[countStr] = arrStr[countStr] + para[i];
              } else {
                  if (para[i] == ')') {
                      arrStr[countStr] = arrStr[countStr] + para[i];
                      countStr += 1;
                  } else {
                      countStr += 1;
                      arrStr[countStr] = arrStr[countStr] + para[i];
                      // System.out.println(para[i]);
                  }
              }
          }
          System.out.println(countStr);
  
          for (int i = 0; i &lt; countStr; i++) {
              System.out.print(arrStr[i]);
          }
  </code></pre>
  
  <p>Before this part, I am reading the following string from a word document:</p>
  
  <pre><code>(wa?&gt;=0)AND(wo?&gt;=0)AND(4*wa?+7*wo?&gt;=50)AND(d1=10)AND((d2=1)+(k=2))
  </code></pre>
  
  <p>I think the problem may be due to the line: </p>
  
  <pre><code>arrStr[countStr] = arrStr[countStr] + para[i]; 
  </code></pre>
  
  <p>Since <code>arrStr[countStr]</code> is null initially and I add an element to it, it saves it as <code>null+para[i]</code>. Do you think it is possible? </p>
  
  <p>Like when I try: <code>System.out.println(arrStr[0]);</code> I get the output as </p>
  
  <pre><code>null(wa?&gt;=0)
  </code></pre>