difference betweeh length and length() in java

difference betweeh length and length() in java

description : To find the length of array we use legth.

ex : define and intiger array and find the length of the array.
int[] number =  new int[3];
number[0] = 1;
number[1] = 3;
number[2] = 5;

int secondHighest = number.length;
output : 3

description : To find the length of string we use legth().

String name = "voice";
System.out.println(name.length() + " length");

output : 5

Several ports (8005, 8080, 8009) required by Tomcat Server at localhost are already in use

Several ports (8005, 8080, 8009) required by Tomcat Server at localhost are already in use

do : netstat -a -o -n

kill process id : taskkill /F /PID 6532

ref : stackoverflow

RDS in aws.

RDS in aws.

Three steps to launch mysql on RDS.
1.Launch.
2.Connect.
3.Manage and moniter.

step 1. launch
a. create db instance.
b. Select engine :
Select db instance from option ex : here we choose mysql from option. (amazon aurora/mariadb/postgresql/oracle/sqlserver).
c. Production :
DEV/test (mysql/amazon aurora).
d. specify db details.
click on (Only show options that are eligible for RDS Free Tier) its a db.t2.micro instance.
select :
DB Instance Identifier* : mydbname
Master Username* : myusername
Master Password : mypassword
Confirm Password : mypassword

version : 5.6.29

select default security group:
default
give DB name.

Click on launch.

java.lang.IllegalStateException: LifecycleProcessor not initialized

java.lang.IllegalStateException: LifecycleProcessor not initialized - call 'refresh' before invoking lifecycle methods via the context: Root WebApplicationContext: startup date


check the configuration in
1. applicationcontext.xml
2.pom.xml

observation :
1. make sure to upgrade dependency to 4.0 release or 3.0 release.