Java – get arrayindexoutofbound: 1 exception

I try to parse a string and store it in a string array When I try to parse the string "Log1", I can parse it

Run the following code:

import static java.lang.System.*;

public class test{


    static String[] final_log = new String[13];
    static String audit = null;
    static String[] auditArray = null;
    static int j=0;

    public static void main(String[] args) {



    String[] columnlist = {"UserID","ClientAddress","Severity","EventType","ResourceAccessed","EventStatus","CompulsoryEvent","AuditCategory","ComponentID","AuditDetails","App ID","Cluster ID","Node ID"};

    String log1 = "UserID : ccmadministrator  ClientAddress : 172.30.235.29  Severity : 5  EventType : GeneralConfigurationUpdate  ResourceAccessed: cucmAdmin  EventStatus : Success  CompulsoryEvent : No  AuditCategory : AdministrativeEvent  ComponentID : Cisco cucm Administration  AuditDetails :  record in table batjob with key field name = Export Configuration,Job id : 1380812040 added  App ID: Cisco Tomcat Cluster ID:  Node ID: iptapps-eft-cucm1" ;


    String log2 = "09:03:36.776 |LogMessage   UserID : ccmadministrator  ClientAddress : 172.30.238.14  Severity : 6  EventType : GeneralConfigurationUpdate  ResourceAccessed: Cisco CCM Serviceability RTMT  EventStatus : Success  CompulsoryEvent : No  AuditCategory : AdministrativeEvent  ComponentID : Cisco CCM Serviceability RTMT  AuditDetails : Alert status changed to Enable for the alert: Cisco Syslog Agent:SYSAGENT:SyslogSeverityMatchFound App ID: Cisco Tomcat Cluster ID:  Node ID: iptapps-eft-cucm1";

    auditArray = log2.split("UserID");
    System.out.println("count :" +j);
    audit = auditArray[1];

    for (int i = 1; i < columnlist.length; i++) {
        auditArray = audit.split(columnlist[i]);
        balle();
    }


    final_log[j]= audit.trim().substring(1).trim();

    for (int i = 0; i < final_log.length; i++) {
        System.out.println("test : " +final_log[i]);
    }



    }

    public static void balle(){
        final_log[j] = auditArray[0].trim().substring(1).trim();
        audit = auditArray[1];
        System.out.println(final_log[j]);
        j++;
    }

}

The console output of Log1 is:

count :0
ccmadministrator
172.30.235.29
5
GeneralConfigurationUpdate
cucmAdmin
Success
No
AdministrativeEvent
Cisco cucm Administration
record in table batjob with key field name = Export Configuration,Job id : 1380812040 added
Cisco Tomcat

test : ccmadministrator
test : 172.30.235.29
test : 5
test : GeneralConfigurationUpdate
test : cucmAdmin
test : Success
test : No
test : AdministrativeEvent
test : Cisco cucm Administration
test : record in table batjob with key field name = Export Configuration,Job id : 1380812040 added
test : Cisco Tomcat
test : 
test : iptapps-eft-cucm1

The console output of log2 is:

count :0
ccmadministrator
172.30.238.14
6
GeneralConfigurationUpdate
Cisco CCM Serviceability RTMT
Success
No
AdministrativeEvent
Cisco CCM Serviceability RTMT
Exception in thread "main" java.lang.Arrayindexoutofboundsexception: 1
    at test.balle(test.java:43)
    at test.main(test.java:27)

Comments from OP:

Line 43 is :: audit = auditArray[1]; {present in balle method}

Solution

The problem is that when you repeatedly split a string with a column name, you inadvertently truncate the rest of the string

The function of log2 is that "severity" appears twice in the string, so the result of split is a three element array Then, you continue with only the contents of the element with index 1 Therefore, you will discard the content after the second occurrence of severity

In your loop, you start looking for the string "app ID", and then you can't find it in the string because it is after the second "severity" Therefore, split returns only one element and gets the exception you get

To solve this problem, you should use the second parameter of split to limit the number of tags returned by the method Substitute:

auditArray = audit.split(columnlist[i]);

use

auditArray = audit.split(columnlist[i],2);