[FIXED] error Exception in thread "main" java.lang.ArrayIndexOutOfBoundsException: how to fix?

Issue

I have a problem, when i running this code, i found this problem. how to fix it ?

this code

      

      public class kpi {
      static String host = "";
      
      public static void main(String[] args) {
        host = args[0].toLowerCase();
        try {
          SimpleDateFormat sdfDate = new SimpleDateFormat("yyyy-MM-dd HH:mm:ssZ");
          Date now = new Date();
          String strDate = sdfDate.format(now);
          JSch jsch = new JSch();
          Session session = jsch.getSession("hs", args[1], 22);
          session.setConfig("StrictHostKeyChecking", "no");
          session.setPassword("kti365LM");
          session.connect();
          System.out.println("session connected");
          Channel channel = session.openChannel("shell");
          OutputStream ops = channel.getOutputStream();
          PrintStream ps = new PrintStream(ops, true);
          channel.connect();
          System.out.println("channel connected");
          String prompt = "[local]" + args[0] + "#";
          System.out.println(exec(channel, ps, "epg node status", prompt));
          String nodeinfo = "";
          nodeinfo = exec(channel, ps, "pdc_kpi.pl", prompt);
          String[] linenode = nodeinfo.split("\\r?\\n");
          String key = "";
          JSONObject peerjson = new JSONObject();
          peerjson.put("time", strDate.replace(" ", "T"));
          peerjson.put("node", args[0]);
          for (int i = 6; i  0 && c  0) {`
                    Pattern p = Pattern.compile("(\\d+(?:\\.\\d+)?)");
                    Matcher m = p.matcher(fields[j]);
                    if (m.find()) {
                      System.out.println(key + ":" + m.group());
                      peerjson.put(key, Float.parseFloat(m.group().trim()));
                      c++;
                    } 
                  } 
                  key = key + fields[j];
                  c++;
                } 
                if (j > 4 && c == 0)
                  break; 
              } 
              key = "";
            } 
          } 
          insert(strDate, "nodekpimme", peerjson.toString());
          channel.disconnect();
          session.disconnect();
        } catch (Exception e) {
          e.printStackTrace();
        } 
      }

and this error

Exception in thread "main" java.lang.ArrayIndexOutOfBoundsException: Index 0 out of bounds for length 0 at trcrt.kpi.main(kpi.java:24)

Solution

Index 0 would be first element but you have no elements in your args.You are probably running your app without arguments. You need to pass them to args variable if you want them to be available.

Answered By - Vojin Purić
Answer Checked By - Cary Denson (JavaFixing Admin)