title: Java : what is this colon(:) doing in this code?
body: <pre><code>public void go(){
      String o = "";
      z:
      for (int x = 0; x&lt;3; x++) {
          for (int y = 0; y&lt;2;y++) {
              if (x==1) 
                  break;
              if (x==2 &amp;&amp; y==1)
                  break z;
              o = o + x+y;
          }
      }
  
      System.out.println(o);
  }
  </code></pre>